Enhancing the heat storage density of silica–alumina by addition of hygroscopic salts (CaCl2, Ba(OH)2, and LiNO3)

Jabbari-Hichri, A.; Bennici, Simona; Auroux, A.

doi:10.1016/j.solmat.2015.04.032

Cited by 70 publications

(35 citation statements)

References 82 publications

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“…In total, 6.73 mol of water per mol of MgSO 4 are lost between 25 and 150°C, which is better result than Essen et al 33 and Hongois et al 15 The total experimental dehydration enthalpy obtained from the MgSO 4 7H 2 O to MgSO 4 nH 2 O is 2256 J g −1 which is equal to 85% of the total dehydration. Additionally, the total experimental energy density of MgSO 4 for the first two decomposition stages is 2.23 GJ/m 3 . The TG‐DSC curve of MgSO 4 7H 2 O permits to state that the energy storage density obtained during dehydration process is sufficient for space heating and validate magnesium sulfate as a potential candidate for thermochemical heat storage application by mean of solar energy.…”

Section: Resultsmentioning

confidence: 87%

“…The high market demand in the field of renewable energy such as solar energy can offers a clean and cheap way of thermal energy. The application of solar energy in space heating provides an effective way to reduce the use of carbon‐based fuels and concerns about environmental pollution 3 . However, the disadvantages of solar energy are its unpredictability of supply and difference between energy demand (winter) and optimum solar energy supply (summer) 4‐6 .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, thermal energy storage (TES) is requiring which provides a better solution for intermittency. In the recent decades, TES technology has received increasing attention for its high potential thermal energy availability and fulfills the cities requirement for effective and sustainable energy use 1,3,7 . TES based on solar energy received a high market price to fulfill space heating needs for their effective and sustainable energy uses 8‐10 .…”

Section: Introductionmentioning

confidence: 99%

“…TES based on solar energy received a high market price to fulfill space heating needs for their effective and sustainable energy uses 8‐10 . Previously, wide ranges of published literature were studies on solar thermal energy storage systems 3,11‐13 . Among various current TES technologies, the thermochemical heat storage (THS) technology achieved a special attention for future use, due to its high storage density and negligible heat loss during storage for long term 13‐15 .…”

Section: Introductionmentioning

confidence: 99%

“…Among various current TES technologies, the thermochemical heat storage (THS) technology achieved a special attention for future use, due to its high storage density and negligible heat loss during storage for long term 13‐15 . THS technology relies on chemical reactions based on salt hydrates involves hydrating/dehydrating process of material, also known as charging/discharging 3,16‐18 . Currently, thermal heat storage technology is still far away from maturation and needs more advancement to fulfill the thermal requirements.…”

Section: Introductionmentioning

confidence: 99%

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Hydration performance and cycling stability of threeTCM:MgSO₄,ZnSO₄andFeSO₄

2020

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Summary Thermochemical heat storage materials offer high‐energy storage densities and clean means of long‐term solar energy storage. The aim of the study is to assess the potential heat storage efficiency of salt hydrates, based on sufficient hydration/dehydration performance, water sorption and cyclicability. MgSO4 7H2O, ZnSO4 7H2O and FeSO4 7H2O were evaluated based on preselected criteria. The main highlights of the dehydration result show that higher enthalpy was obtained for MgSO4 and ZnSO4, shows 2256 and 1731 J g−1 enthalpy, respectively. During hydration process, six water molecules were absorb by MgSO4 and ZnSO4 after pre‐dehydrated temperature 150°C and 120°C, respectively. The cycle stability of MgSO4 and ZnSO4 showed better performance which give rise 1210 g−1 and 1155 J g−1 enthalpy, respectively. It was expected that FeSO4 would show higher cyclicability due to their higher enthalpy (1400 J g−1) in the first round; however, overhydration does not permit it to released larger energy. The impact of relative humidity on water sorption performance and rate of hydration were reported which showed that MgSO4 and ZnSO4 can uptake maximum water under 85% and 75% relative humidity. Ongoing studies and the booming progress of ZnSO4 7H2O illustrate that likewise MgSO4 7H2O, it is also the potential candidate and can be use in thermochemical heat storage devices. To bring zinc sulfate heptahydrate into market, more detail studies in fields of evaluation of advanced materials and development of efficient and compact prototypes are still required.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%