Experimental investigation of an innovative thermochemical process operating with a hydrate salt and moist air for thermal storage of solar energy: Global performance

Michel, Benoît; Mazet, Nathalie; Neveu, Pierre

doi:10.1016/j.apenergy.2014.04.073

Cited by 141 publications

(52 citation statements)

References 20 publications

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“…There are three types of TES technologies based respectively on sensible heat, latent heat and reversible thermochemical processes. Thermochemical based method has the potential to store 8-20 times more thermal energy per unit of mass of storage material than the sensible and latent heat based TES technologies, and has therefore attracted significant attention in the past decade [4][5][6][7][8]. However, the technology readiness level of the thermochemical storage (TCS) is still low and has multiple challenges including life span and stability of storage materials, efficient thermochemical reactors and integration and TCS system costs.…”

Section: Introductionmentioning

confidence: 99%

“…MgSO4, CaCl2 and LiBr) in different structural materials including zeolite, silica gel and activated carbon [12,17,18]. Composite TCS containing SrBr2, however, remains largely unexplored, and the published studies were primarily on energy storage density [19][20][21] or on the performance of pure SrBr2 at the reactor scale [8,22] [23]. To our knowledge, no studies have been published on linkage between the performance and structure of the composite TCS containing SrBr2the main motivation of this paper.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hybrid strontium bromide-natural graphite composites for low to medium temperature thermochemical energy storage: Formulation, fabrication and performance investigation

Cammarata

Verda

Sciacovelli

et al. 2018

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid strontium bromide-natural graphite composites for low to medium temperature thermochemical energy storage: Formulation, fabrication and performance investigation

Cammarata

Verda

Sciacovelli

et al. 2018

Energy Conversion and Management

View full text Add to dashboard Cite

show abstract

“…Pure salt thermochemical heat storage has been studied in laboratory with the design and test of a prototype using the hydration of the strontium bromide SrBr 2 [15,32]. They report in their study that hydration specific powers up to 4.3 kW m −3 and an energy density of 190 kWh m −3 has been reached for a theoretical bed salt energy density of 388 kWh m −3 .…”

Section: Open Systemsmentioning

confidence: 99%

Thermodynamic Efficiency of Water Vapor/Solid Chemical Sorption Heat Storage for Buildings: Theoretical Limits and Integration Considerations

Kuznik

Johannes

2020

Applied Sciences

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The theoretical limits of water sorbate-based chemical sorption heat storage are investigated in this study. First, a classification of thermochemical heat storage is proposed based on bonding typology. Then, thermodynamics of chemical solid/gas sorption is introduced. The analysis of the reaction enthalpy from the literature indicates that this value is only slightly varying for one mole of water. Using this observation, and with the help of thermodynamic considerations, it is possible to derive conclusions on energy efficiency of closed and open heat storage systems. Whatever the salt, the main results are (1) the energy required for evaporation of water is, at least, 65% of the available energy of reaction, and (2) the maximum theoretical energy efficiency of the system, defined as the ratio of the heat released to the building over the heat provided to the storage, is about 1.8. Considering the data from literature, it is also possible to show that perfectly working prototypes have an energy efficiency about 49%. Based on those results, it is possible to imagine that for the best available material, a perfect thermochemical heat storage system would correspond to 12 times water with a temperature difference about 50 °C. Such solution is definitely competitive, provided that some difficult issues are solved—issues that are discussed throughout this paper.

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“…Michel et al [28] demonstrated a 400 kg large scale thermochemical system for thermal storage of solar energy. The system was operated under atmospheric conditions, SrBr 2 /H 2 O as the working pair, with the overall storage capacity of 105 kWh.…”

Section: Introductionmentioning

confidence: 99%

Combined Solar Thermochemical Solid/Gas Energy Storage Process for Domestic Thermal Applications: Analysis of Global Performance

et al. 2019

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Thermal energy used below 100 °C for space heating/cooling and hot water preparation is responsible for a big amount of greenhouse gas emissions in the residential sector. The conjecture of thermal solar and thermochemical solid/gas energy storage processes renders the heat generation to become ecologically clean technology. However, until present, few pilot scale installations were developed and tested. The present work is devoted to the experimental study of global performance of a pilot scale thermochemical energy storage prototype. Two working modes, namely fixed packed bed and moving bed, were tested using 2.2 kg and 5.5 kg of composite material (silica gel impregnated with calcium chloride) under indoor atmospheric conditions. The global experimental efficiency of a 49l water tank charging process during 75 min was found as high as 0.8–0.85. The energy storage density reached in the fixed bed mode by the material was 158 kWh/m3, while in the moving bed mode it was 2.5 times lower. The reasons for such a difference are discussed in depth in the text.

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Experimental investigation of an innovative thermochemical process operating with a hydrate salt and moist air for thermal storage of solar energy: Global performance

Cited by 141 publications

References 20 publications

Hybrid strontium bromide-natural graphite composites for low to medium temperature thermochemical energy storage: Formulation, fabrication and performance investigation

Hybrid strontium bromide-natural graphite composites for low to medium temperature thermochemical energy storage: Formulation, fabrication and performance investigation

Thermodynamic Efficiency of Water Vapor/Solid Chemical Sorption Heat Storage for Buildings: Theoretical Limits and Integration Considerations

Combined Solar Thermochemical Solid/Gas Energy Storage Process for Domestic Thermal Applications: Analysis of Global Performance

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