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Seasonal solar thermal energy storage using thermochemical sorption in domestic dwellings in the UK

Ma, Zhiwei; Bao, Huashan; Roskilly, Anthony Paul

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Abstract

The present paper explored the potential of the seasonal solar thermal energy storage (SSTES) system using ammonia-based chemisorption for domestic application in the UK. The dynamic charging/discharging performance of the SSTES has been simulated using the real weather data with the solar thermal collector models, the domestic heating demand model and the chemisorption model. The selection of working salts has significantly influence on the system design and dynamic performance. The CaCl2-4/8NH3 chemisorption can satisfy almost 100% of space heating demand when using low temperature hating facility during discharging stage, however, due to its relatively higher desorption temperature and limited sunlight available in the Newcastle-upon-Tyne the required solar collectors area exceeds the commonly available space of dwelling roof. The NaBr-0/5.25NH3 chemisorption is only able to contribute 18.6% of heating demand because the temperature of the discharged heat cannot reach the required level for most of the time in the heating season. The best scenario studied was using BaCl2-0/8NH3 chemisorption SSTES (45.2 m3 storage volume) combined with low temperature heating facilities and a 30.5 m2 solar collector, which can cover about 57.4% of space heating for a dwelling with a heat loss coefficient at 150 W/K.

Journal Article Type Article
Acceptance Date Oct 11, 2019
Online Publication Date Oct 12, 2019
Publication Date Jan 31, 2019
Deposit Date Oct 11, 2019
Publicly Available Date Oct 23, 2019
Journal Energy
Print ISSN 0360-5442
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 166
Pages 213-222
DOI https://doi.org/10.1016/j.energy.2018.10.066
Public URL https://durham-repository.worktribe.com/output/1288637

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