A review on long-term sorption solar energy storage

N’Tsoukpoe, Kokouvi Edem; Liu, Hui; Pierrès, Nolwenn Le; Luo, Lingai

doi:10.1016/j.rser.2009.05.008

Cited by 547 publications

(282 citation statements)

References 20 publications

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“…Among these studies, two prototypes have been devoted to CaCl 2 eH 2 O based aqueous solution. The basic operating principle of this thermal energy storage method [153] is similar to absorption heat pump cycle (see Section 4) with a major difference: a heat storage system is a discontinuous process that needs at least two storage tanks, for both the calcium chloride solution and the water. Under the same conditions, CaCl 2 eH 2 O indicates low energy storage density compared to other aqueous solutions [17,102].…”

Section: The Use Of Cacl 2 For Sorption Energy Storagementioning

confidence: 99%

A review on the use of calcium chloride in applied thermal engineering

N’Tsoukpoe¹,

Rammelberg²,

Fopah-Lele³

et al. 2015

Applied Thermal Engineering

113

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Section: The Use Of Cacl 2 For Sorption Energy Storagementioning

confidence: 99%

A review on the use of calcium chloride in applied thermal engineering

N’Tsoukpoe¹,

Rammelberg²,

Fopah-Lele³

et al. 2015

Applied Thermal Engineering

113

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“…. 6}, are particularly interesting due to their high energy storage densities (roughly 2-3 GJ/m 3 ) 2 and their wide availability. Solar energy collected in summer can be stored as the energy of dehydration, and in winter, the system is hydrated to retrieve the stored energy.…”

Section: Introductionmentioning

confidence: 99%

A DFT based equilibrium study on the hydrolysis and the dehydration reactions of MgCl2 hydrates

Iype

Nedea

Rindt

2013

The Journal of Chemical Physics

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Magnesium chloride hydrates are characterized as promising energy storage materials in the built-environment. During the dehydration of these materials, there are chances for the release of harmful HCl gas, which can potentially damage the material as well as the equipment. Hydrolysis reactions in magnesium chloride hydrates are subject of study for industrial applications. However, the information about the possibility of hydrolysis reaction, and its preference over dehydration in energy storage systems is still ambiguous at the operating conditions in a seasonal heat storage system. A density functional theory level study is performed to determine molecular structures, charges, and harmonic frequencies in order to identify the formation of HCl at the operating temperatures in an energy storage system. The preference of hydrolysis over dehydration is quantified by applying thermodynamic equilibrium principles by calculating Gibbs free energies of the hydrated magnesium chloride molecules. The molecular structures of the hydrates (n = 0, 1, 2, 4, and 6) of MgCl2 are investigated to understand the stability and symmetry of these molecules. The structures are found to be noncomplex with almost no meta-stable isomers, which may be related to the faster kinetics observed in the hydration of chlorides compared to sulfates. Also, the frequency spectra of these molecules are calculated, which in turn are used to calculate the changes in Gibbs free energy of dehydration and hydrolysis reactions. From these calculations, it is found that the probability for hydrolysis to occur is larger for lower hydrates. Hydrolysis occurring from the hexa-, tetra-, and di-hydrate is only possible when the temperature is increased too fast to a very high value. In the case of the mono-hydrate, hydrolysis may become favorable at high water vapor pressure and at low HCl pressure.

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“…Solar energy seems the most a promising source to fill these requirements but is necessary to evaluate the economic and technical feasibilities of thermal energy storage (TES) systems. Also efficient and low cost devices are needed to be competitive with traditional sources [1]. TES systems can also represent a breakthrough concept in industrial heat recovery applications.…”

Section: Introductionmentioning

confidence: 99%

Industrial waste materials and by-products as thermal energy storage (TES) materials: A review

Gutiérrez

Miró

Gil

et al. 2016

AIP Conference Proceedings

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Abstract.A wide variety of potential materials for thermal energy storage (TES) have been identify depending on the implemented TES method, Sensible, latent or thermochemical. In order to improve the efficiency of TES systems more alternatives are continuously being sought. In this regard, this paper presents the review of low cost heat storage materials focused mainly in two objectives: on the one hand, the implementation of improved heat storage devices based on new appropriate materials and, on the other hand, the valorisation of waste industrial materials will have strong environmental, economic and societal benefits such as reducing the landfilled waste amounts, reducing the greenhouse emissions and others. Different industrial and municipal waste materials and by products have been considered as potential TES materials and have been characterized as such. Asbestos containing wastes, fly ashes, by-products from the salt industry and from the metal industry, wastes from recycling steel process and from copper refining process and dross from the aluminium industry, and municipal wastes (glass and nylon) have been considered. This work shows a great revalorization of wastes and by-product opportunity as TES materials, although more studies are needed to achieve industrial deployment of the idea.

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A review on long-term sorption solar energy storage

Cited by 547 publications

References 20 publications

A review on the use of calcium chloride in applied thermal engineering

A review on the use of calcium chloride in applied thermal engineering

A DFT based equilibrium study on the hydrolysis and the dehydration reactions of MgCl2 hydrates

Industrial waste materials and by-products as thermal energy storage (TES) materials: A review

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