Review Topical Sections

Thermal energy storage based on cementitious materials: A review

  • Renewable energy storage is now essential to enhance the energy performance of buildings and to reduce their environmental impact. Many heat storage materials can be used in the building sector in order to avoid the phase shift between solar radiation and thermal energy demand. However, the use of storage material in the building sector is hampered by problems of investment cost, space requirements, mechanical performance, material stability, and high storage temperature. Cementitious material is increasingly being used as a heat storage material thanks to its low price, mechanical performance and low storage temperature (generally lower than 100 °C). In addition, cementitious materials for heat storage have the prominent advantage of being easy to incorporate into the building landscape as self-supporting structures or even supporting structures (walls, floor, etc.). Concrete solutions for thermal energy storage are usually based on sensible heat transfer and thermal inertia. Phase Change Materials (PCM) incorporated in concrete wall have been widely investigated in the aim of improving building energy performance. Cementitious material with high ettringite content stores heat by a combination of physical (adsorption) and chemical (chemical reaction) processes usable in both the short (daily, weekly) and long (seasonal) term. Ettringite materials have the advantage of high energy storage density at low temperature (around 60 °C). The encouraging experimental results in the literature on heat storage using cementitious materials suggest that they could be attractive in a number of applications. This paper summarizes the investigation and analysis of the available thermal energy storage systems using cementitious materials for use in various applications.

    Citation: Khadim Ndiaye, Stéphane Ginestet, Martin Cyr. Thermal energy storage based on cementitious materials: A review[J]. AIMS Energy, 2018, 6(1): 97-120. doi: 10.3934/energy.2018.1.97

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  • Renewable energy storage is now essential to enhance the energy performance of buildings and to reduce their environmental impact. Many heat storage materials can be used in the building sector in order to avoid the phase shift between solar radiation and thermal energy demand. However, the use of storage material in the building sector is hampered by problems of investment cost, space requirements, mechanical performance, material stability, and high storage temperature. Cementitious material is increasingly being used as a heat storage material thanks to its low price, mechanical performance and low storage temperature (generally lower than 100 °C). In addition, cementitious materials for heat storage have the prominent advantage of being easy to incorporate into the building landscape as self-supporting structures or even supporting structures (walls, floor, etc.). Concrete solutions for thermal energy storage are usually based on sensible heat transfer and thermal inertia. Phase Change Materials (PCM) incorporated in concrete wall have been widely investigated in the aim of improving building energy performance. Cementitious material with high ettringite content stores heat by a combination of physical (adsorption) and chemical (chemical reaction) processes usable in both the short (daily, weekly) and long (seasonal) term. Ettringite materials have the advantage of high energy storage density at low temperature (around 60 °C). The encouraging experimental results in the literature on heat storage using cementitious materials suggest that they could be attractive in a number of applications. This paper summarizes the investigation and analysis of the available thermal energy storage systems using cementitious materials for use in various applications.


    1. Introduction

    World energy consumption has huge environmental and socioeconomic impacts. Heat storage allows the use of renewable energy in buildings to be increased and enhances their energy storage performance. The problem of using solar energy is its intermittent character. It is clear that heat storage could avoid the phase shift between solar radiation and thermal energy demand and would increase the use of solar energy in the building sector. Many heat storage materials could be used for this purpose.

    Sensible heat storage is widely used in such devices as a hot water tanks [1]. Concrete solutions for thermal energy storage are usually based on sensible heat transfer and thermal inertia [2,3,4,5,6,7] and numerous numerical studies have been performed on sensible heat storage using concrete [8,9,10,11]. Despite the prominent advantage of mechanical performance, the disadvantages of sensible heat storage by concrete are low storage density, the space required, heat loss and short duration of heat storage.

    The storage density of Phase Change Materials (PCM) is higher than that of materials storing sensible heat [12,13]. Phase change materials (PCMs) and their applications in thermal energy storage have been considered by several authors [12,14,15,16]. To improve building energy performance, the incorporation of PCM in concrete walls has been investigated [15,16,17,18,19,20,21,22,23,24]. Several models have been developed to predict the heat storage performance and the thermal or mechanical properties of concrete containing phase change materials [16,25,26,27,28]. However, these materials are not suitable for long-term heat storage. A seasonal storage system requires very low heat loss between summer and winter, and high energy density to reduce its size and cost [29].

    Sorption heat storage materials are extensively used in buildings [30,31,32,33,34,35,36] and the behavior of sorption heat storage materials such as zeolites has often been simulated [6,35,37,38]. The method used to improve the heat storage capacity of these materials consists in impregnating the sorption material with hygroscopic salt [39,40,41,42,43,44].

    Chemical storage materials have the advantage of high storage density compared to other storage materials [13,45,46]. Thermodynamic or kinetic models have been designed to simulate chemical reactions that allow heat to be stored [47,48,49,50]. Despite their high storage density, the main problems of chemical storage materials are high storage temperature (500 ℃ for calcium hydroxide), low mechanical resistance and high investment cost. Cementitious materials (paste, mortar, concrete) with high ettringite content demonstrate high energy storage density at low temperature (around 60 ℃), they have high mechanical strength, and are relatively cheap. Thermal energy storage by ettringite material is a combination of physical (adsorption) and chemical (chemical reaction) processes usable in both the short (daily, weekly) and long (seasonal) term. In the charge phase, the heat is stored by endothermic heating (desorption and dehydration) and is not restored as long as the ettringite material is kept dry. In the discharge phase, the heat stored in the ettringite material is released by exothermic adsorption (adsorption and hydration). Figure 1 describes the types of heat storage and the concrete used as the storage material.

    Figure 1. Classification of heat storage by cementitious material.

    Struble and Brown [51] were among the first to study the storage capacity of cementitious materials such as ettringite (3CaO·Al2O3·3CaSO4·32H2O). Heat storage using ettringite-based material (non-aerated material) has also been studied [52]. To improve exchanges (permeability) between water and ettringite molecules (enhancing storage efficacy), aerated cementitious material with high ettringite content was developed by sulfoaluminate cement hydration [53,54]. A numerical model was set up to predict the spatiotemporal behavior of ettringite based material during the charging and discharging phases [55]. The durability and stability of the resulting ettringite material was investigated (thermal stability, carbonation, and reversibility) [56]. Heat storage prototypes with ettringite material have been designed and tested [54,55].

    Hence, we feel it is now essential to compile and review heat storage, particularly that based on cementitious material used as a sensible, latent, thermochemical storage material. This review aims to compile the advances made in cementitious material for heat storage and the place such materials occupy among the usual storage materials used in the building sector.


    2. Concrete properties

    The properties of concrete vary with its density. They can be examined by adapting concrete density. Non-aerated concrete, with a high density, has good mechanical performance but low insulating capacity. Aerated concretes (lightweight concrete) are increasingly used in buildings for their insulating capacities and the economies that their light weight permits in supporting structures (foundations, walls, lower floors). There are 3 methods for pore-formation in (aerated) concrete: the air-entraining method (gas concrete) [57], the foaming method (foamed concrete) [58,59] and a combined pore forming method [59].

    High mechanical strength is required if aerated concrete is to be used as structural material in a building. The method of curing influences the compressive strength [57]. To improve its mechanical performance and shrinkage, aerated concrete can be autoclaved [58,60,61,62]. The chemical reactions taking place during the autoclave process are described in [63,64]. Furthermore, the pore structure and size influence the mechanical resistance of the material [65] and are highly dependent on concrete density [57,62,66]. Samson et al. [66] have plotted the mechanical resistance of concrete according to its density, where each color corresponds to data from a reference in the literature (Figure 2). In addition, the compressive strengths and thermal conductivities of PCM-enhanced cementitious materials are provided in Figure 2 and Figure 3, respectively [67,68]. As expected, Figure 2 shows an increase in the compressive strength with increasing concrete density.

    Figure 2. Compressive strength of concrete according to density (literature data [66,67,68]).
    Figure 3. Thermal conductivity of concrete according to density (literature data [66,67,68]).

    Aerated concrete is widely used as insulating material in buildings thanks to its low conductivity [69]. The cellular concretes have a very low thermal conductivity, which depends on the bulk density, the water content, and the material composition [59,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72]. The thermal conductivity of concrete is very sensitive to its water content [73]. A 1% increase in the water content of the material leads to a 16% increase in thermal conductivity [74]. Like its thermal conductivity, the compressive strength of concrete increases with its density (Figure 3) [66].

    The type, size and distribution of pores are mainly responsible for the permeability [57]. Thus, the measurement of gas permeability indirectly characterizes the pore structure of aerated concrete [75]. Water vapor transfer is explained in terms of gas permeability, although gas permeability does not change significantly according to the pore-formation method [57]. Jacobs and Mayer [76] found the water and gas permeability to be approximately the same in all the materials they tested (Table 1). In [76] it was found that gas permeability decreased with increasing water content beyond a critical water content.

    Table 1. Water and gas permeability values for ACC [76].
    Bulk density (kg/m3) Porosity (%) Gas permeability [10–14 m2] Water permeability [10–14 m2]
    390 84.0 2.8 ± 1.4 3.0 ± 1.8
    490 78.9 1.4 ± 0.4 1.0 ± 0.6
    610 74.8 2.4 ± 1.6 2.0 ± 1.5
    630 74.2 2.4 ± 0.3 2.9 ± 1.8
     | Show Table
    DownLoad: CSV

    Ndiaye et al. [53,56] noted that, like the porosity (14% to 76%), the gas permeability increased greatly (by a factor of 250) between non-aerated and aerated cement paste. The gas permeability of aerated cement paste (8.8 × 10–14 m2) was very much higher than that of non-aerated cement paste (3.6 × 10–16 m2). This strong increase in permeability provided information about the inter-connectivity of the porosity created by chemical foaming. The porosity of the material must be strongly interconnected to allow the gas to circulate.

    Unlike other properties, the specific heat capacity of concrete is independent of its air content. It depends on the concrete composition. Thus, the measured specific heat capacity is almost constant (around 1000 J/(kg·K)) despite variations in the concrete density (Table 2). Because of their high heat capacity, cementitious materials have been used as sensible heat storage material (0–100 ℃) [77].

    Table 2. Heat capacity of autoclaved aerated concrete [78].
    Bulk density (kg/m3) Porosity (%) Specific heat capacity [J/(kg·K)]
    304 85.1 1080
    363 83.7 1160
    500 77.6 1050
     | Show Table
    DownLoad: CSV

    3. Sensible storage

    Storage of sensible heat is due to the increase in the material temperature without phase change. A heat source (e.g. solar heat) makes it possible to raise the material temperature by ΔT, the stored heat generated by this temperature rise being determined by the first principle of thermodynamics (Eq 1).

    E=mcΔT (1)

    with E the energy stored in the material (J), m the mass of the material (kg), c the specific heat capacity of the material (J/(kg·K)) and ΔT the mean temperature rise (K or ℃).

    Sensible heat storage is generally used at low temperature in a range where the material is stable; its phase change temperature must not be reached. The most widely used sensitive heat storage material is liquid water because of its high specific heat capacity: c = 4180 J/(kg·K) at 20 ℃, for a temperature range lower than 100 ℃. Water is used in daily heat storage systems commonly known as solar water heaters [1]. These systems, consisting of solar thermal panels and a water tank are becoming increasingly efficient [79]. The combination of a solar water heater and an auxiliary boiler can cover the hot water needs of a building [80]. In addition, other sensitive heat storage materials such as concrete, compact rock and soil can be used in buildings [77]. Concrete solutions for thermal energy storage are usually based on sensible heat transfer and thermal inertia [2,3,4,5,6].The cementitious material (concrete) is used to store sensible heat in a monolithic block, enhancing the energy building performance (column, wall) [8].

    Compared to other, expensive ceramic materials, concrete has already demonstrated its ability to provide suitable and economically feasible thermal energy storage solutions using sensible heat [81,82,83]. Thanks to its low cost and good thermal conductivity, a concrete block with a piping network has been used in solar power plants at temperatures of up to 400 ℃ (Figure 4) [9,10,84,85].

    Figure 4. Thermal energy storage module (concrete) of solar platform in Almeria (Spain) [84].

    The advantages of concrete storage systems in solar power plants are the low cost of storage media, the easy workability of the material, and the limited degradation of heat transfer between exchanger and storage medium [10]. Among the main disadvantages are cost increments for the exchanger and engineering in general, and long-term instability.

    Sensitive heat storage is suitable for the short term, but for long-term storage (seasonal) a large amount of storage material (e.g. large underground hot water tank) is required, with good thermal insulation. The disadvantages of sensible heat storage in buildings are low storage density, heat loss during storage, the space required and the limited storage time.


    4. Latent storage

    The storage density of Phase Change Materials (PCM) is higher than that of materials storing sensible heat [12,13]. The thermal energy is stored by a change of the physical state of the material at almost constant temperature (Eq 2).

    E=mL (2)

    with E the amount of latent heat stored (J), m the mass of the PCM (kg), and L the specific latent heat of the PCM (J/kg).

    Phase change materials (PCMs) and their applications in thermal energy storage have been investigated by many researchers [12,14,15,16]. To improve building energy performance, the focus has often been on PCM incorporated in concrete walls [15,16,17,18,19,20,21,22,23,24]. Basically, three different ways to use PCMs for heating and cooling of buildings are [86]: (ⅰ) PCMs in building walls, (ⅱ) PCMs in building components other than walls, and (ⅲ) PCMs in hot and cold storage units. The incorporation of PCM into different sections of buildings, such as wallboards, floor and Trombe wall, has shown promise in applications for heating or cooling systems in buildings [15]. It improves the thermal inertia of the building, thus avoiding sudden changes in the indoor temperature [87].

    Figure 5 shows the heat storage capacity of self-compacting concrete with 13.5% PCM by volume [67]. The heat storage capacity of PCM concrete tile (10.6 J/g) has been observed to be significantly better than those of traditional concrete tile. It was found that the addition of 13.5% PCM per volume of concrete tile increased the heat storage capability by 35% while maintaining acceptable compressive strength (28.4 MPa) [67]. This indicated that the 3.8-cm-thick tile of PCM-enhanced concrete had a thermal mass equivalent to that of a 5.9-cm-thick tile of regular concrete. The use of PCM-enhanced concrete floor tile greatly improved the building's thermal inertia (especially in a lightweight building).

    Figure 5. Volumetric heat capacity for self-compacting concrete (SCC) with 13.5% PCM [67].

    Cement based thermal energy storage composites (TESC) were developed by including PCM (paraffin) in ordinary cement mortar [88]. TESC based on Portland cement with 20%, 40%, 60%, and 80% of PCM was tested; the results showed significantly enhance thermal performance with increasing levels of PCM in the composite [88]. The energy storage capacity of the ordinary cement mortar was greatly increased (from 47 to 125 J/g) when the replacement ratio was 80%. However, including PCM in cementitious materials had the disadvantage of leading to a drop in mechanical performance [86,89]; a reduction in compressive strength was observed with increasing levels of PCM in the composite (Figure 6).

    Figure 6. Compressive strength of normal concrete (NC) and various thermal energy storage composites (TESC based on Portland cement with 20%, 40%, 60%, and 80% of PCM) [88].

    The depletion of non-renewable energies and rising energy prices have driven the emergence of European Union directives designed to increase energy efficiency by 20% before 2020. Energy retrofitting is now essential to reduce the high energy consumption in existing buildings [90] and PCM concrete tile is a valuable option this field. Furthermore, the application of PCM wallboards to surfaces in building retrofitting have been shown to improve the thermal comfort [91]. The use of PCM wallboards in the retrofitting of typical office buildings in five European cities led to a significant decrease of cooling energy demands in each city [92]. A composite PCM system (panels) consisting of two commercial PCMs with different melting temperatures (21.7 ℃ and 25 ℃) was investigated for the energy retrofit of high-rise apartments (high, transparent facades) in Toronto [90]. The application of composite PCM to the walls and ceiling of 1:10 scale test cells representing a typical apartment reduced temperature fluctuations (6 ℃) in both the cooling and heating seasons.

    The incorporation of PCM into cementitious matrix material improved its heat storage capacity and the thermal inertia of the building. However, some disadvantages of PCMs constrain their use in the building sector: low phase change enthalpy, limited storage time, mechanical effect on cementitious material, volume instability, and (in some cases) flammability of the PCM.


    5. Sorption storage and chemical storage

    Sorption storage and chemical storage are carried out by physisorption (desorption -adsorption) and chemical heat storage (dehydration -hydration), respectively [93]. These two types of energy storage have the advantage of having a higher storage density than sensible heat storage or latent heat storage.

    Sorption storage consists of storing heat by using it to break the bond between water molecules and the material. The breaking of this physical bond is an endothermic reaction (endothermic desorption) [13,94]. Heating the material for sorption storage leads to endothermic desorption of the water molecules. This is the charging phase. The heat stored in the material is released during the exothermic adsorption of water molecules in the discharge phase [13]. Akgun [95] classifies sorption storage materials as organic, inorganic or hybrid. The characteristics of sorption storage materials (in the form of a powder bed) such as zeolites, activated carbons and silica gels have been widely studied in the literature [34,95,96]. Many experimental or numerical studies have been performed on zeolites [31,32,33,34,35]. These sorption storage materials are suitable for seasonal heat storage in buildings. Nevertheless, their storage density is lower than that of chemical storage materials.

    As the name implies, chemical storage is related to a chemical reaction (Eq 3). In the charging phase, the material (A) is heated (for example by solar energy) until chemical decomposition breaks it down into two stable elements (B) and (C) [13,44,97]. The stored heat is restored during the exothermic chemical reaction of (B) and (C). The chemical storage device requires separate tanks containing the reaction products [13]. The reversible chemical reaction allows heat to be charged and discharged according to Eq 3.

    A+HeatB+C (3)

    Ettringite (3CaO·Al2O3·3CaSO4·32H2O) is a common hydrate found in cement-based materials and it has the advantage of high energy storage density at low temperature (around 60 ℃) [51]. Portland cements used in most construction materials produce a few percent of ettringite, but calcium sulfoaluminate cements (CSA) can produce much larger amounts of this compound (40–80%) with fairly rapid kinetics [53,56]. Thermal energy storage by ettringite material is a physicochemical process usable in both the short term (day, week) and long term (season). The physical process is related to water vapor desorption-adsorption on ettringite molecules. The connection between ettringite and free water molecules is physical bonding related to the weak intermolecular forces (Van der Waals forces) and hydrogen bonding [56]. The chemical heat storage process is based on the reversible ettringite-metaettringite conversion (dehydration-hydration process) according to Eq 4 [55,56]. In the charge phase, the heat is stored by endothermic heating (desorption and dehydration) and is not restored as long as the material is dry. In the discharge phase, the heat stored in the material is released by exothermic adsorption (adsorption and hydration) [54]. The enthalpy of dehydration allows the amount of heat energy stored chemically to be determined.

    Ettringite(30H2O)+HeatMetaettringite(12H2O)+Water(18H2O) (4)

    Struble and Brown [51] were among the first to study the storage capacity of pure ettringite. They produced pure ettringite by chemical synthesis from pure minerals, thus satisfying the high AFt content criterion. However, this method led to ettringite precipitation in the form of powder, whereas monolithic storage material is required for mechanical strength. Several types of substituted ettringitewere chemically synthetized with stoichiometric proportions of raw materials [51]. The precipitated salts were investigated using TGA and DSC (Table 3).

    Table 3. Dehydration data for substituted ettringite phases [51].
    Phase Loss (mol H2O per mole phase) Enthalpy change (J/g phase)
    [Ca3Al(OH)6]2(SO4)3·26H2O 19 600
    [Ca3Fe(OH)6]2(SO4)3·26H2O 24 800
    [Ca3Al(OH)6]2(CO3)3·26H2O 23 800
    [Ca3Si(OH)6]2(SO4)2(CO3)2·24H2O 9 300
     | Show Table
    DownLoad: CSV

    The high dehydration enthalpy of these ettringite phases and the reversibility of the reaction proved their heat storage capacity (Table 3). However, additional studies were necessary to design and produce a prototype with ettringite based cementitious material as a proof of concept.


    5.1. Non-aerated ettringite material

    A heat storage reactor with sulfoaluminate cement based material was tested by Winnefeld and Kaufmann [52,98]. The reactor [98] consisted of ettringite material (18 × 40 × 50 cm) cast on a piping network which allowed heat to be charged (heating) into and discharged (hydration) from the material (Figure 7). During the charging phase, a hot fluid circulated in the horizontal sealed piping network (No.1, Figure 7) generating endothermic dehydration of the material around the tube; the heat was thus stored. The heat discharging phase was controlled by the vertical perforated piping network (No.2, Figure 7) where liquid water circulated and hydrated the material, the stored heat being restored by exothermic rehydration. Liquid water rather than vapor was used to hydrate the material, so only chemical heat was stored.

    Figure 7. Heat storage reactor using ettringite material [98].

    To test the heat storage system at building scale, a full scale prototype project was built to cover the heat needs of a single-family house located in Seelisberg (Switzerland) by seasonal heat storage [99]. The large scale prototype consisted of 6 m3 of sulfoaluminate based material with a copper piping system, which was installed in the garage of the house to store and discharge solar heat. The storage device consisted of 24 separate, 400 kg blocks connected by copper pipe. The ettringite material was sealed off from the surrounding environment by a metal case. The house was equipped with 20 m2 of solar panels heating a water tank (9 m3) to 85 ℃. This sensible storage made it possible to store solar energy from the collector and provided the amount of heat needed to keep the house comfortable until the end of December. The prototype with ettringite material was intended to avoid the heat gap during two months (January and February) [99]. This prototype was connected to the central heating system by a network of pipes connecting the solar panels, water tank, and heat exchanger. The solar panels made it possible to heat the 6 m3 of ettringite material to 80 ℃ during the summer by the circulation of heat transfer fluid (water) in a copper tube. This heating led to endothermic dehydration of the storage material (charging phase). Then the heat was restored in winter by hydration (exothermic reaction) using liquid water (discharging phase). The cold water inside the tubes was heated by the restored heat and transported to the house. However, the use of cementitious material as a thermochemical storage material in the building sector is hampered by problems of durability (carbonation, thermal stability) and material structure [55,56]:

    Sustainability: the main problem of using the material is the chemical stability of ettringite molecules over time in the presence of carbon dioxide (CO2) [56], which, when there is moisture in the cementitious matrix, may cause carbonation leading to the decomposition of hydrated phases. Grounds et al. [100], Nishikawa et al. [101] and Chen and Zou [102] confirmed the sensitivity of ettringite to atmospheric CO2. This showed that the use of ettringite material as heat storage material required it to be protected against CO2. So an open-loop heat storage prototype in air was not adequate. To overcome this stability problem, a prototype using moist nitrogen instead of moist air to humidify the ettringite material in the discharging phase was designed to avoid ettringite carbonation [54,55].

    Material: the ettringite material based on sulfoaluminate cement has low porosity and low permeability [103], which is not favorable for water vapor transfer through the material porous network [56]. During the charging phase, it is necessary for the desorbed water vapor to move easily through porosity from the inside to the outside of the reactor to achieve complete dehydration (fully dry material). Similarly, water vapor from outside should move easily through the porosity to fully hydrate the material (saturated material). Partial hydration (or partial dehydration) leads to incomplete heat release (or to incomplete charging of heat). So to optimize the storage efficiency, it is important to enhance the permeability, thus favoring water transfer in the material porosity. To overcome this structural problem and improve the heat storage capacity of the material, its porosity and permeability must be increased [53].


    5.2. Aerated ettringite material

    The aerated ettringite material for heat storage was developed in the laboratory [53,54,56], where the hydration of sulfoaluminate binders was followed by X-ray diffraction (XRD), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) [53]. This was completed by thermodynamic modeling to predict the chemical evolution of the material during hydration (ettringite content) [53]. The resulting material had a high ettringite content (68%) and dimensional stability. However, this material had a high density, which reduced the accessibility of water molecules to that of AFt. In order to use the ettringite material as heat storage material, it was necessary to improve its permeability, thus enhancing the diffusion of water vapor in the material and the exchanges between water and AFt molecules [56]. The ettringite system based on sulfoaluminate binder (CSA clinker and anhydrite) was aerated by addition of aluminum powder and calcium hydroxide (Ca(OH)2), the reaction of the latter (foaming process) releasing hydrogen gas which increased the volume of the paste and generated porosity [53,54] (Figure 8).

    Figure 8. Aerated ettringite material used as heat storage material [54].

    The heat storage capacity of this improved material was tested using the closed loop heat storage prototype under nitrogen gas. A model based on the energy and mass balance in the cementitious material was developed and simulated in MatLab software, and was able to predict the spatiotemporal behavior of the storage system [55]. This enabled a first thermochemical reactor prototype to be built for heat storage tests in both the charging and discharging phases. This first reactor was a cylindrical adsorber (d = 11 cm, l = 13 cm) equipped with an axial copper pipe (d = 1 cm) [55]. Thus experimental tests validated the numerical model and served as proof of concept. Nevertheless the amount of stored heat released in the discharging phase was only 61 kWh/m3 instead of the theoretical maximum of 138 kWh/m3 (or a heat storage yield of 44%). To enhance the storage yield, a second prototype (without the metal tube) where a single gas (nitrogen) in direct contact with the ettringite material porosity served as the heat transfer fluid in the charging phase and as the humidifying gas in the discharging phase.

    To perform the storage tests in the laboratory, the reactor was connected to a heater and a humidifier to simulate heat charging and discharging, respectively. The heater was only used during the charging phase and the humidifier only hydrated the material during the discharging phase. The {reactor + heat source + source of moisture} set formed the heat storage system. The test bed installed in the laboratory reproduced the functioning of the system. The reactor (second prototype) was a cylindrical thermochemical adsorber, 16 cm in diameter and 32 cm long, with no piping network. It consisted of ettringite material insulated from steam or water by a PVC cylinder (Figure 9). To avoid heat loss, the reactor was thermally insulated from its surroundings by a 10 cm thick layer of glass wool and a thin layer of polystyrene at the surface.

    Figure 9. Prototype of the thermochemical reactor with ettringite material [53].

    During the heat charging phase, the electric heating system was used to heat the dry nitrogen as in a solar collector and the resulting hot gas (60 ℃) passed through the porosity of the material [54]. The dehydration of the material led to the heat storage. This period lasted for about 3 days for this prototype size (4.4 l, 1.8 kg). The heat stored was not restored as long as the ettringite material was isolated from water (vapor or liquid). Unlike in sensitive or latent storage systems, thermal insulation of the ettringite material was not required during the intermediate phase between charging and discharging. Heat storage could be short-term (for days or weeks) or long-term (seasonal) [55]. The chemical part of the storage process (endothermic dehydration) was related to the conversion of ettringite to metaettringite by the loss of 18 molecules of water per molecule of ettringite (Eq 4).

    In the discharging phase, a humidification system consisting of a water bubbler was used to charge the gas (nitrogen) circulating through it with water vapor. This humidified gas passed through the permeable porous material, which adsorbed water vapor (physical reaction) and then hydrated (chemical reaction). This generated an exothermic reaction (Eq 4) and the restored heat was transported by the heat transfer fluid (nitrogen). During this phase of heat recovery, the cold, humidified gas (inlet nitrogen) became hot and dry (outlet nitrogen). The reversibility of the ettringite material reaction was proved by physicochemical investigations over several heat storage cycles [51,56]. The heat storage yield, the ratio of discharged heat to charged heat, was 71%, with a storage density of 117 kWh/m3. The prototype was not only simpler in terms of operation, but also more efficient in terms of heat storage performance than other thermochemical prototypes using hydrate salts [29].


    5.3. Advantages of ettringite material compared to other storage materials

    In addition to the high potential storage density, there are several advantages of using ettringite material for heat storage:

    Low storage temperature (around 60 ℃): Portlandite (Ca(OH)2), identified in Figure 10, is a hydrate phase found in cementitious material capable of storing high amounts of heat (chemical), but with a high storage temperature (500 ℃). Zeolites, one of the most commonly used sorption storage materials, store heat at about 200 ℃. Indeed, the disadvantage of this type of material (chemical storage and sorption storage) is its high storage temperature, difficult to achieve with a conventional solar collector. The advantage of ettringite is its high storage density at low temperature (about 60 ℃). This temperature range (around 60 ℃) is easily reached using a conventional solar collector and is suitable for heating systems, or controlled mechanical ventilation, especially for low-energy buildings [104].

    Figure 10. Energy density and temperature range of storage materials [105].

    Space requirement: Figure 11 compares the volume of material necessary to store 6.7 MJ according to the type of storage [45]. Sensitive heat storage (water for example) requires the highest material volume due to its low storage capacity. Phase change materials (PCM), with higher storage density, require less volume. The figure shows that chemical reaction storage systems, are much less cumbersome than those using sensitive or latent storage. Thus the space issue, which has been holding back the use of heat storage materials in buildings, could be avoided with this cementitious material.

    Figure 11. Material volume required to store 6.7 MJ [45].

    Investment cost: The running cost and the cost of insulation increase with the volume of storage material. Therefore, volume appears to be the most important criterion for the economic evaluation of the storage system. Investment, operation, maintenance and recycling costs must all be taken into account in the economic evaluation of a storage system [105]. Van Berkel [105] made a comparison of energy prices for several heat storage materials (Figure 12). This confirmed the advantage of ettringite material in terms of investment cost in comparison with phase change materials and sorption storage materials (e.g., zeolites). Ettringite, with its higher storage density, has a unit price 10 times lower than that of zeolites (Figure 12).

    Figure 12. Costs per unit energy capacity of heat storage materials [105].

    Thermal insulation during intermediate storage phase: The heat storage cycle consists of 3 phases (charging, intermediate, and discharging phases). The intermediate phase between charging and discharging generally lasts the longest—several months for seasonal storage. One of the key problems of seasonal heat storage is to ensure thermal insulation during this long period. In the case of cementitious material (ettringite), thermal insulation is not necessary during this intermediate phase as the heat from chemical sorption is not restored as long as the material remains isolated from water (liquid or vapor). This may argue in favor of the use of this cementitious material as a seasonal storage material. However, the charging and discharging phases require thermal insulation.

    Short-and long-term heat storage: Sensible storage or latent storage is not suitable for long-term storage. In addition to the large volume of material required (low storage density), the problem of thermal insulation is a major handicap for this type of storage. By combining physisorption and chemisorption, ettringite material has the advantage of being appropriate for both short-term (daily) and long-term (seasonal) storage.

    Mechanical resistance: Most heat storage materials come in the form of a powder bed (zeolite, magnesium sulfate), whereas the cementitious material is in monolithic form with mechanical resistance (cement paste, mortar or concrete). Ettringite binders have been widely used in building construction thanks to their high mechanical resistance [106,107].The monolithic form of the storage material and its mechanical strength would enable it to be easily integrated in buildings as walls or bricks storing heat. Depending on the mechanical requirements of the construction, the storage material can be used as a self-supporting structure or even a supporting structure if its mechanical strength is sufficient.


    5.4. Building applications of heat storage by ettringite

    Heat storage with ettringite material shows promise for heating system applications in the building and industrial sectors [54]. Thermochemical reactors with ettringite material can be integrated in any system where low temperature heat storage is needed to increase the use of renewable energy (heating systems, ventilation, etc.).

    Self-supporting wall storing solar heat: The monolithic form of the storage material and its mechanical strength enable it to be easily integrated in buildings as walls or bricks storing heat. Depending on the mechanical requirements of the construction, the storage material can be used as a self-supporting structure or even a supporting structure if its mechanical strength is sufficient. During the charging phase, a hot fluid from the thermal collector circulates in the porosity network of the aerated wall, generating endothermic dehydration and thus heat storage. On the other hand, the heat discharging phase is controlled by a humidification system where water vapor circulates and hydrates the material, the stored heat being restored by exothermic rehydration. The resulting hot gas in a closed circuit could be used via a heat exchanger to heat ambient air in the building. This allows the thermal inertia of the building to be improved, thus avoiding sudden changes in the indoor temperature. This type of application is hence confirmed as a valuable option in lightweight buildings, where thermal inertia is generally low.

    Solar storage box: This consists of a cylindrical thermochemical reactor with ettringite material connected to humidifier device. This box, installed in building and connected to solar panels, enables renewable solar heat to be stored. The automatic humidifier can release heat to maintain thermal comfort in the building. The solar storage box can thus solve the problems related to solar heat intermittency, thereby increasing the use of renewable energy in the building sector. This type of box can be combined with an auxiliary boiler using an electronic regulator to meet household energy needs (heating or hot water).


    6. Conclusion

    Cementitious materials have been considered purely for their mechanical performance for too long. Nowadays, the heat storage capacity of concrete is attracting great interest. This paper summarizes the investigation and analysis of available thermal energy storage systems with cementitious materials for use in different applications and gives an overview and comparison of advances in cementitious materials and their place among the usual storage materials. It should be noted that the properties of concrete depend greatly on its density.

    Thanks to its high heat capacity and mechanical performance, concrete allows sensible heat from solar collectors to be stored in a building in the short term by using concrete modules, walls, or floors with piping networks. The use of a concrete block with a piping network at larger scale in a concentrated solar power plant has shown encouraging results. Research works are still needed to find suitable hydrothermal conditions ensuring sufficient energy density, stability and cyclability, and acceptable compressive strength of the concrete.

    The incorporation of PCM in different sections of a building, such as walls and floors, has promising applications for heating or cooling systems. It improves the thermal inertia of the building, thus avoiding sudden changes in the indoor temperature. The use of PCM is suitable for lightweight buildings where building inertia is low. Tile or wallboards with PCM-enhanced concrete are a valuable option in building retrofitting to decrease energy demands. However, the incorporation of PCM in cementitious materials leads to a drop in mechanical performance. In building applications, it is necessary to find a compromise that optimizes energy density, mechanical performance and durability of PCM-enhanced concrete.

    Sensible and latent cementitious materials are capable of storing heat but only in the short term (day, week). Experiments with prototypes show that cementitious material with high ettringite content can store heat by physicochemical process usable in both the short term (days or weeks) and long term (season). The main advantages of ettringite material are high energy storage density at moderate temperature (around 60 ℃), high mechanical strength, and low price. Thermochemical reactors with ettringite material can be integrated in any system where low temperature storage heat is needed to increase the use of renewable energy in the building sector. However, the use of cementitious material in buildings is hampered by problems of durability: thermal stability, reversibility, mechanical stability and volume stability. The durability criterion must not be neglected when choosing a heat storage material, particularly in buildings where mechanical strength is required (supporting structure). The seasonal cyclability remains to be investigated in a building-scale prototype.


    Conflict of interest

    All authors declare no conflict of interest in this paper.


    [1] Dehghana AA, Barzegarb A (2011) Thermal performance behavior of a domestic hot water solar storage tank during consumption operation. Energ Convers Manage 52: 468–476. doi: 10.1016/j.enconman.2010.06.075
    [2] Bopshetty SV, Nayak JK, Sukhatme SP (1992) Performance analysis of a solar concrete collector. Energ Convers Manage 33:1007–1016. doi: 10.1016/0196-8904(92)90135-J
    [3] Hazami M, Kooli S, Lazâar M, et al. (2010) Energetic and exergetic performances of an economical and available integrated solar storage collector based on concrete matrix. Energ Convers Manage 51: 1210–1218. doi: 10.1016/j.enconman.2009.12.032
    [4] Wu M, Li M, Xu C, et al. (2014) The impact of concrete structure on the thermal performance of the dual-media thermocline thermal storage tank using concrete as the solid medium. Appl Energy 113: 1363–1371. doi: 10.1016/j.apenergy.2013.08.044
    [5] Martins M, Villalobos U, Delclos T, et al. (2015) New Concentrating Solar Power Facility for Testing High Temperature Concrete Thermal Energy Storage. Energy Procedia 75: 2144–2149. doi: 10.1016/j.egypro.2015.07.350
    [6] Su L, Li N, Zhang X, et al. (2015) Heat transfer and cooling characteristics of concrete ceiling radiant cooling panel. Appl Therm Eng 84: 170–179. doi: 10.1016/j.applthermaleng.2015.03.045
    [7] Girardi M, Giannuzzi GM, Mazzei D, et al. (2017) Recycled additions for improving the thermal conductivity of concrete in preparing energy storage systems. Constr Build Mater 135: 565–579. doi: 10.1016/j.conbuildmat.2016.12.179
    [8] Ozrahat E, Ünalan S (2017) Thermal performance of a concrete column as a sensible thermal energy storage medium and a heater. Renew Energy 111: 561–579. doi: 10.1016/j.renene.2017.04.046
    [9] Giannuzzi GM, Liberatore R, Mele D, et al. (2017) Experimental campaign and numerical analyses of thermal storage concrete modules. Sol Energy 157: 596–602. doi: 10.1016/j.solener.2017.08.041
    [10] Salomoni VA, Majorana CE, Giannuzzi GM, et al. (2014) Thermal storage of sensible heat using concrete modules in solar power plants. Sol Energy 103: 303–315. doi: 10.1016/j.solener.2014.02.022
    [11] Mao Q, Zheng T, Liu D, et al. (2017) Numerical simulation of single spiral heat storage tank for solar thermal power plant. Int J Hydrogen Energy 42: 18240–18245. doi: 10.1016/j.ijhydene.2017.04.145
    [12] Farid MM, Khudhair AM, Razack SAK, et al. (2004) A review on phase change energy storage: materials and applications. Energy Convers Manage 45: 1597–1615. doi: 10.1016/j.enconman.2003.09.015
    [13] Pinel P, Cynthia AC, Beausoleil-Morrison I, et al. (2011) A review of available methods for seasonal storage of solar thermal energy in residential applications. Renew Sust Energ Rev 15: 3341–3359. doi: 10.1016/j.rser.2011.04.013
    [14] Zhu N, Ma Z, Wang S (2009) Dynamic characteristics and energy performance of buildings using phase change materials: a review. Energy Convers Manage 50: 3169–3181. doi: 10.1016/j.enconman.2009.08.019
    [15] Sharma RK, Ganesan P, Tyagi VV, et al. (2015) Developments in organic solid–liquid phase change materials and their applications in thermal energy storage. Energ Convers Manage 95: 193–228. doi: 10.1016/j.enconman.2015.01.084
    [16] Sun X, Zhang Q, Medina MA, et al. (2016) Parameter design for a phase change material board installed on the inner surface of building exterior envelopes for cooling in China. Energ Convers Manage 120: 100–108. doi: 10.1016/j.enconman.2016.04.096
    [17] Kuznik F, David D, Johannes K, et al. (2011) A review on phase change materials integrated in building walls. Renew Sust Energ Rev 15: 379–391. doi: 10.1016/j.rser.2010.08.019
    [18] Xu B, Li Z (2014) Performance of novel thermal energy storage engineered cementitious composites incorporating a paraffin/diatomite composite phase change material. Appl Energy 121: 114–122. doi: 10.1016/j.apenergy.2014.02.007
    [19] Memon SA, Cui HZ, Zhang H, et al. (2015) Utilization of macro encapsulated phase change materials for the development of thermal energy storage and structural lightweight aggregate concrete. Appl Energy 139: 43–55. doi: 10.1016/j.apenergy.2014.11.022
    [20] Thiele AM, Sant G, Pilon L (2015) Diurnal thermal analysis of microencapsulated PCM-concrete composite walls. Energ Convers Manage 93: 215–227. doi: 10.1016/j.enconman.2014.12.078
    [21] Zhou G, Pang M (2015) Experimental investigations on the performance of a collector–storage wall system using phase change materials. Energ Convers Manage 105: 178–188. doi: 10.1016/j.enconman.2015.07.070
    [22] Ramakrishnan S, Sanjayan J, Wang X, et al. (2015) A novel paraffin/expanded perlite composite phase change material for prevention of PCM leakage in cementitious composites. Appl Energy 157: 85–94. doi: 10.1016/j.apenergy.2015.08.019
    [23] Wang X, Yu H, Li L, et al. (2016) Experimental assessment on the use of phase change materials (PCMs)-bricks in the exterior wall of a full-scale room. Energ Convers Manage 120: 81–89. doi: 10.1016/j.enconman.2016.04.065
    [24] Cui H, Tang W, Qin Q, et al. (2017) Development of structural-functional integrated energy storage concrete with innovative macro-encapsulated PCM by hollow steel ball. Appl Energy 185: 107–118. doi: 10.1016/j.apenergy.2016.10.072
    [25] Hembade L, Neithalath N, Rajan SD (2014) Understanding the Energy Implications of Phase-Change Materials in Concrete Walls through Finite-Element Analysis. J Energy Eng 140.
    [26] Cui H, Memon SA, Liu R (2015) Development, mechanical properties and numerical simulation of macro encapsulated thermal energy storage concrete. Energ Buildings 96: 162–174. doi: 10.1016/j.enbuild.2015.03.014
    [27] Arora A, Sant G, Neithalath N (2017) Numerical simulations to quantify the influence of phase change materials (PCMs) on the early-and later-age thermal response of concrete pavements. Cem Concr Compos 81: 11–24. doi: 10.1016/j.cemconcomp.2017.04.006
    [28] Šavija B, Zhang H, Schlangen E (2017) Influence of microencapsulated phase change material (PCM) addition on (micro) mechanical properties of cement paste. Materials 10: 863. doi: 10.3390/ma10080863
    [29] Michel B, Mazet N, Neveu P (2014) Experimental investigation of an innovative thermochemical process operating with a hydrate salt and moist air for thermal storage of solar energy: Global performance. Appl Energy 129: 177–186. doi: 10.1016/j.apenergy.2014.04.073
    [30] Pons M, Laurent D, Meunier F (1996) Experimental temperature fronts for adsorptive heat pump applications. Appl Therm Eng 16: 395–404. doi: 10.1016/1359-4311(95)00025-9
    [31] Sun LM, Feng Y, Pons M (1997) Numerical investigation of adsorptive heat pump systems with thermal wave heat regeneration under uniform-pressure conditions. Int J Heat Mass Transfer 2: 281–293.
    [32] Mhimid A (1998) Theoretical study of heat and mass transfer in a zeolite bed during water desorption: validity of local thermal equilibrium assumption. Int J Heat Mass Transfer 41: 2967–2977. doi: 10.1016/S0017-9310(98)00010-6
    [33] Leong KC, Liu Y (2004) Numerical modeling of combined heat and mass transfer in the adsorbent bed of a zeolite/water cooling system. Appl Therm Eng 24: 2359–2374. doi: 10.1016/j.applthermaleng.2004.02.014
    [34] Hongois S, Kuznik F, Stevens P, et al. (2011) Development and characterization of a new MgSO4 - zeolite composite for long-term thermal energy storage. Sol Energy Mater Sol Cells 95: 1831–1837. doi: 10.1016/j.solmat.2011.01.050
    [35] Duquesne M, Toutain J, Sempey A, et al. (2014) Modeling of a nonlinear thermochemical energy storage by adsorption on zeolites. Appl Therm Eng 1: 469–480.
    [36] Scapino L, Zondag HA, Van Bael J, et al. (2017) Sorption heat storage for long-term low-temperature applications: A review on the advancements at material and prototype scale. Appl Energy 190: 920–948. doi: 10.1016/j.apenergy.2016.12.148
    [37] Lehmann C, Beckert S, Gläser R, et al. (2017) Assessment of adsorbate density models for numerical simulations of zeolite-based heat storage applications. Appl Energy 185: 1965–1970. doi: 10.1016/j.apenergy.2015.10.126
    [38] Semprini S, Lehmann C, Beckert S (2017) Numerical modelling of water sorption isotherms of zeolite 13XBF based on sparse experimental data sets for heat storage applications. Energ Convers Manage 150: 392–402. doi: 10.1016/j.enconman.2017.08.033
    [39] Stevens P, Hongois S (2009) Matériau et procédé de stockage d'énergie thermique. Patent EP 2163520 A1, filed September 3, 2009.
    [40] Levitskij EA, Aristov YI, Tokarev MM, et al. (1996) "Chemical Heat Accumulators": A new approach to accumulating low potential heat. Sol Energy Mater Sol Cells 44: 219–235. doi: 10.1016/0927-0248(96)00010-4
    [41] Aristov YI, Tokarev MM, Cacciola G, et al. (1996) Selective Water Sorbents for Multiple Applications, 1. CaCl2 Confined in Mesopores of Silica Gel: Sorption Properties. React Kinet Catal Lett 59: 325–333.
    [42] Aristov YI, Restuccia G, Tokarev MM, et al. (2000) Selective Water Sorbents for Multiple Applications. 11. CaCl2 Confined to Expanded Vermiculite. React Kinet Catal Lett 71: 377–384. doi: 10.1023/A:1010351815698
    [43] Aristov YI (2009) Optimal adsorbent for adsorptive heat transformers: Dynamic considerations. Int J Refrig 32: 675–686. doi: 10.1016/j.ijrefrig.2009.01.022
    [44] Aristov YI (2012) Adsorptive transformation of heat: Principles of construction of adsorbents database. Appl Therm Eng 42: 18–24. doi: 10.1016/j.applthermaleng.2011.02.024
    [45] Hadorn JC (2008) Advanced storage concepts for active solar energy - IEA SHC Task32 2003–2007. EuroSun -1st international conference on solar heating, cooling and buildings, Lisbon, Portugal.
    [46] Yu N, Wang RZ, Wang LW (2013) Sorption thermal storage for solar energy. Prog Energy Combust Sci 39: 489–514. doi: 10.1016/j.pecs.2013.05.004
    [47] Schaube F, Koch L, Wörner A, et al. (2012) A thermodynamic and kinetic study of the de- and rehydration of Ca(OH)2 at high H2O partial pressures for thermo-chemical heat storage. Thermochim Acta 538: 9–20. doi: 10.1016/j.tca.2012.03.003
    [48] Rougé S, Criado YA, Soriano O, et al. (2017) Continuous CaO/Ca(OH)2 fluidized bed reactor for energy storage: first experimental results and reactor model validation. Ind Eng Chem Res 56: 844–852. doi: 10.1021/acs.iecr.6b04105
    [49] Kalyva EA, Vagia ECH, Konstandopoulos AG, et al. (2017) Particle model investigation for the thermochemical steps of the sulfur–ammonia water splitting cycle. Int J Hydrogen Energy 42: 3621–3629. doi: 10.1016/j.ijhydene.2016.09.003
    [50] Criado YA, Huille A, Rougé S, et al. (2017) Experimental investigation and model validation of a CaO/Ca(OH)2 fluidized bed reactor for thermochemical energy storage applications. Chem Eng J 313: 1194–1205. doi: 10.1016/j.cej.2016.11.010
    [51] Struble LJ, Brown PW (1986) Heats of dehydration and specific heats of compounds found in concrete and their potential for thermal energy storage. Sol Energy Mater 1: 1–12.
    [52] Winnefeld F, Kaufmann J (2011) Concrete produced with calcium sulfoaluminate cement: a potential system for energy and heat storage. First Middle East conference on smart monitoring, assessment and rehabilitation of civil structures (SMAR 2011), Dubai, United Arab Emirates.
    [53] Ndiaye K (2016) Etude numérique et expérimentale du stockage d'énergie par les matériaux cimentaires. PhD Thesis, Université Toulouse III.
    [54] Cyr M, Ginestet S, Ndiaye K (2015) Energy storage/withdrawal system for a facility. Patent WO 2017089698 A1, issued June 1, 2017.
    [55] Ndiaye K, Ginestet S, Cyr M (2017) Modelling and experimental study of low temperature energy storage reactor using cementitious material. Appl Therm Eng 110: 601–615. doi: 10.1016/j.applthermaleng.2016.08.157
    [56] Ndiaye K, Ginestet S, Cyr M (2017) Durability and stability of an ettringite-based material for thermal energy storage at low temperature. Cem Concr Res 99: 106–115. doi: 10.1016/j.cemconres.2017.05.001
    [57] Narayanan N, and Ramamurthy K (2000) Structure and properties of aerated concrete: a review. Cem Concr Compos 22: 321–329. doi: 10.1016/S0958-9465(00)00016-0
    [58] Valore RC (1954) Cellular concretes-composition and methods of preparation. J Am Concr Inst 25: 773–795.
    [59] Rudnai G (1963) Light weight concretes. Budapest: Akademi Kiado.
    [60] Shrivastava OP (1977) Lightweight aerated or cellular concrete - a review. Indian Concr J 51: 18–23.
    [61] RILEM recommended practice (1993) Autoclaved aerated concrete - Properties, testing and design. E&FN SPON, ISBN 0419179607.
    [62] CEB Manual of design and technology (1977) Autoclaved aerated concrete. Construction Press, ISBN 0904406768.
    [63] Midgley HG, Chopra SK (1960) Hydrothermal reactions between lime and aggregate. Mag Concr Res 12: 73–82. doi: 10.1680/macr.1960.12.35.73
    [64] Mitsuda T, Kiribayashi T, Sasaki K, et al. (1992) Influence of hydrothermal processing on the properties of autoclaved aerated concrete, In: Wittmann FH, editor. Proceedings Advances in Autoclaved Aerated Concrete, 11–18.
    [65] Schober G (1992) Effect of size distribution of air pores in AAC on compressive strength. In: Whittmann FH, editor. Proceedings Advances in Autoclaved Aerated Concrete, 77–81.
    [66] Gabriel S, Phelipot-Mardelé A, Lanos C (2017) A review of thermomechanical properties of lightweight concrete. Mag Concr Res 69: 201–216. doi: 10.1680/jmacr.16.00324
    [67] Narain J, Jin W, Ghandehari M, et al. (2016) Design and application of concrete tiles enhanced with microencapsulated phase-change-material. J Archit Eng 22: 05015003. doi: 10.1061/(ASCE)AE.1943-5568.0000194
    [68] Cao VD, Pilehvar S, Salas-Bringas C, et al. (2017) Microencapsulated phase change materials for enhancing the thermal performance of Portland cement concrete and geopolymer concrete for passive building applications. Energ Convers Manage 133: 56–66. doi: 10.1016/j.enconman.2016.11.061
    [69] Bave G (1980) Aerated light weight concrete-current technology. In: Proceedings of the Second International Symposium on Lightweight Concretes. London.
    [70] Watson KL, Eden NB, Farrant JR (1977) Autoclaved aerated materials from slate powder and Portland cement. Precast Concr, 81–85.
    [71] Laurent JP, Guerre-Chaley C (1995) Influence of water content and temperature on the thermal conductivity of autoclaved aerated concrete. Mater Struct 28: 164–172.
    [72] Richard TG (1977) Low temperature behaviour of cellular concrete. J Am Concr Inst 47: 173–178.
    [73] Valore RC (1956) Insulating concretes. J Am Concr Inst 28: 509–532.
    [74] Tada S (1986) Material design of aerated concrete-An Optimum Performance Design. Mater Struct 19: 21–26. doi: 10.1007/BF02472306
    [75] Wagner F, Schober G, Mortel H (1995) Measurement of gas permeability of autoclaved aerated concrete in conjunction with its physical properties. Cem Concr Res 25: 1621–1626. doi: 10.1016/0008-8846(95)00157-3
    [76] Jacobs F, Mayer G (1992) Porosity and permeability of autoclaved aerated concrete. In: Wittmann FH, editor. Proceedings Advances in Autoclaved Aerated Concrete, 71–76.
    [77] Hadorn JC (2005) Thermal energy storage for solar and low energy buildings, state of art. International Energy Association (IEA).
    [78] Jerman M, Keppert M, Výborný J, et al. (2013) Hygric, thermal and durability properties of autoclaved aerated concrete. Constr Build Mater 41: 352–359. doi: 10.1016/j.conbuildmat.2012.12.036
    [79] Radulescu M (2012) Improved boiler installation. Patent EP 2224176 B1, filed July 24, 2012.
    [80] Godin G (2017) Installation solaire mixte de chauffage et d'eau chaude sanitaire. Patent EP 2306096 B1, issued April 12, 2017.
    [81] Laing D, Lehmann D, Bahl C (2008) Concrete storage for solar thermal power plants and industrial process heat. Proceedings of the 3rd International Renewable Energy Storage Conference (IRES III 2008), Berlin, Germany.
    [82] Laing D, Bahl C, Bauer T, et al. (2011) Thermal energy storage for direct steam generation. Sol Energy 85: 627–633. doi: 10.1016/j.solener.2010.08.015
    [83] Laing D, Bahl C, Bauer T, et al. (2012) High-temperature solid-media thermal energy storage for solar thermal power plants. Proc IEEE 100: 516–524. doi: 10.1109/JPROC.2011.2154290
    [84] Laing D, Steinmann WD, Tamme R (2006) Solid media thermal storage for parabolic trough power plants. Sol Energy 80: 1283–1289. doi: 10.1016/j.solener.2006.06.003
    [85] Laing D, Lehmann D, Fiß M (2009) Test results of concrete thermal energy storage for parabolic trough power plants. J Sol Energy Eng 131: 041007. doi: 10.1115/1.3197844
    [86] Sharma A, Tyagi VV, Chen CR, et al. (2009) Review on thermal energy storage with phase change materials and applications. Renew Sust Energ Rev 13: 318–345. doi: 10.1016/j.rser.2007.10.005
    [87] Fukai J, Hamada Y, Morozumi Y, et al. (2002). Effect of carbon-fiber brushes on conductive heat transfer in phase change materials. Int J Heat Mass Transfer 45: 4781–4792. doi: 10.1016/S0017-9310(02)00179-5
    [88] Ramakrishnan S, Wang X, Sanjayan J, et al. (2017) Thermal Energy Storage Enhancement of Lightweight Cement Mortars with the Application of Phase Change Materials. Procedia Eng 180: 1170–1177. doi: 10.1016/j.proeng.2017.04.277
    [89] Mazzucco G, Xotta G, Salomoni VA, et al. (2017) Solid thermal storage via PCM materials. Numerical investigations. Appl Therm Eng 124: 545–559. doi: 10.1016/j.applthermaleng.2017.05.142
    [90] Soudian S, Berardi U (2017) Experimental investigation of latent thermal energy storage in high-rise residential buildings in Toronto. Energy Procedia 132: 249–254. doi: 10.1016/j.egypro.2017.09.706
    [91] Rodriguez-Ubinas E, Arranz BA, Sanchez SV, et al. (2013) Influence of the use of PCM drywall and the fenestration in building retrofitting. Energy Build 65: 464–476. doi: 10.1016/j.enbuild.2013.06.023
    [92] Ascione F, Bianco N, De Masi RF, et al. (2014) Energy refurbishment of existing buildings through the use of phase change material: Energy saving and indoor comfort in the cooling season. Appl Energy 113: 99–107.
    [93] Bales C, Gantenbein P, Jaeing D, et al. (2008) Final report of subtask B - Chemical and Sorption Storage. Report B7, IEA SHC-Task 32.
    [94] Nic M, Jirat J, Kosata B (2006) IUPAC compendium of chemical terminology. Oxford. Available from: http://dx.doi.org/10.1351/goldbook.
    [95] Akgün U (2007) Prediction of adsorption equilibria of gases. Genehmigten Dissertation, Technischen Universität München.
    [96] Ruthven DM (1984) Principles of adsorption and adsorption processes. Wiley Interscience, New York. ISBN 0471866067.
    [97] Bales C, Gantenbein P, Hauer A, et al. (2005) Thermal properties of materials for thermo-chemical storage of solar heat. Report B2-IEA SHC Task 32.
    [98] Kaufmann J, Winnefeld F (2011) Cement-based chemical energy stores. Patent EP 2576720 B1, issued April 10, 2011.
    [99] Concrete heating (2015) Empa news n49 p16. Available from: https://www.empa.ch/web/s604/concrete-heating?inheritRedirect=true
    [100] Grounds T, Midgley HG, Novell DV (1988) Carbonation of ettringite by atmospheric carbon dioxide. Thermochim Acta 135: 347–352. doi: 10.1016/0040-6031(88)87407-0
    [101] Nishikawa T, Suzuki K, Ito S (1992) Decomposition of synthesized ettringite by carbonation. Cem Concr Res 22: 6–14. doi: 10.1016/0008-8846(92)90130-N
    [102] Chen X, Zou R (1994) Kinetic study of ettringite carbonation reaction. Cem Concr Res 24: 1383–1389. doi: 10.1016/0008-8846(94)90123-6
    [103] Zhang L, Glasser FP (2005) Investigation of the microstructure and carbonation of CSA-based concretes removed from service. Cem Concr Res 35: 2252–2260. doi: 10.1016/j.cemconres.2004.08.007
    [104] Règlementation thermique (2012). Available from: http://www.rt-batiment.fr/batiments-neufs/reglementation-thermique-2012/presentation.html
    [105] Van Berkel J (2000) Solar thermal storage techniques. Research commissioned by The Netherlands Agency for Energy and the Environment NOVEM, project # 143.620-935.8.
    [106] Le Saoût G, Lothenbach B, Hori A, et al. (2013) Hydration of Portland cement with additions of calcium sulfoaluminates. Cem Concr Res 43: 81–94. doi: 10.1016/j.cemconres.2012.10.011
    [107] Le Saoût G, Lothenbach B, Taquet P, et al. (2014) Hydration study of a calcium aluminate cement blended with anhydrite. Calcium Aluminates International Conference : Proceedings of the fourth Conference, Avignon, France.
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