Experimental studies for the cyclability of salt hydrates for thermochemical heat storage

Donkers, Paj Pim; Pel, Leo L; Adan, Ocg Olaf

doi:10.1016/j.est.2015.11.005

Cited by 85 publications

(45 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This has a detrimental effect on the actual thermal energy storage density as part of the stored energy is not actually accessible. The use of carbon graphite matrix in the TCS composites greatly reduces the hysteresis, indicating an improved mass transfer which contribute to overcome the cyclability issue of salts [35] We ascribe this to the channeling effect of the platy particles of carbon graphite as schematically illustrated in Figure 12. The carbon graphite supports the salt particles while at the same time provides transport channels for water molecules to reach the salt (hydration process during charge).…”

Section: Resultsmentioning

confidence: 97%

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

Link to publication on Research at Birmingham portal General rights Unless a licence is specified above, all rights (including copyright and moral rights) in this document are retained by the authors and/or the copyright holders. The express permission of the copyright holder must be obtained for any use of this material other than for purposes permitted by law. • Users may freely distribute the URL that is used to identify this publication. • Users may download and/or print one copy of the publication from the University of Birmingham research portal for the purpose of private study or non-commercial research. • User may use extracts from the document in line with the concept of 'fair dealing' under the Copyright, Designs and Patents Act 1988 (?) • Users may not further distribute the material nor use it for the purposes of commercial gain. Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

show abstract

Section: Resultsmentioning

confidence: 97%

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

“…Recently there has been a fundamental transformation in society that is changing our lives, working and thinking 1 . Revolution of renewable energy sources provides a viable solution and plays a significant role in the consumption of fossil fuels and concerns about environmental pollution 2 .…”

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%

“…The choice of the suitable hydrate salts is an essential step in terms of thermochemical heat storage materials. Numerous sulfate base salt hydrates are used as a possible thermochemical heat storage materials, 19 including: MgSO 4 7H 2 O, 20 CuSO 4 5H 2 O, 1 FeSO 4 7H 2 O, 21 Al(SO 4 ) 3 18H 2 O, 22 ZnSO 4 7H 2 O 21,23,24 and Li 2 SO 4 H 2 O 25 . However, not every salt shows better thermochemical heat storage properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydration performance and cycling stability of threeTCM:MgSO₄,ZnSO₄andFeSO₄

2020

View full text Add to dashboard Cite

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.

show abstract

“…Research on the hydration steps has only been carried out to a smaller extend so far. However, Donkers et al . stated, that the deliquescence relative humidity of the salt hydrate has a big influence on the released heat as well as on the cycle stability of the storage system.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of MgCl₂ ⋅ 6 H₂O as Thermochemical Energy Storage Material

2018

View full text Add to dashboard Cite

Hydrates of magnesium chloride are interesting as a thermochemical energy storage material. An open storage system was set-up, which enables the reaction of water vapor with the salt hydrate at a given relative humidity. It is demonstrated that hydrates of magnesium chloride are only suited if the relative humidity is below 30 %. Otherwise the hygroscopic salt will cause the formation of an aqueous, liquid phase. This liquid inhibits mass transport and leads to the agglomeration of particles. As a consequence of the low partial pressure of the water, the reaction is very slow. Therefore, rather low effective energy densities of around 300 kJ kg À 1 were measured. A way to enable higher humidities is to use a solid support like zeolite 13X. However, the adsorption of water vapor on the zeolite, without magnesium chloride, reached higher energy densities even at low relative humidity. Thus, it must be concluded that hydration of magnesium chloride for thermochemical energy storage cannot be recommended for most technical applications.[a] T.

show abstract

Experimental studies for the cyclability of salt hydrates for thermochemical heat storage

Cited by 85 publications

References 25 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

Hydration performance and cycling stability of threeTCM:MgSO₄,ZnSO₄andFeSO₄

Experimental Study of MgCl₂ ⋅ 6 H₂O as Thermochemical Energy Storage Material

Contact Info

Product

Resources

About

Experimental studies for the cyclability of salt hydrates for thermochemical heat storage

Cited by 85 publications

References 25 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

Hydration performance and cycling stability of threeTCM:MgSO4,ZnSO4andFeSO4

Experimental Study of MgCl2 ⋅ 6 H2O as Thermochemical Energy Storage Material

Contact Info

Product

Resources

About

Hydration performance and cycling stability of threeTCM:MgSO₄,ZnSO₄andFeSO₄

Experimental Study of MgCl₂ ⋅ 6 H₂O as Thermochemical Energy Storage Material