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Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage

R.J. Sutton, Eifion Jewell Orcid Logo, Jonathon Elvins, Justin Searle Orcid Logo, P. Jones

Energy and Buildings, Volume: 162, Pages: 109 - 120

Swansea University Authors: Eifion Jewell Orcid Logo, Jonathon Elvins, Justin Searle Orcid Logo

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DOI (Published version): 10.1016/j.enbuild.2017.11.068

Abstract

Transpired solar collectors (TSC) are an efficient means of building heating but due to the demand/use mismatch their capabilities are maximised when paired with a suitable storage technology. The Hydration and/dehydration of inorganic salts provides an appropriate energy storage medium which is com...

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Published in: Energy and Buildings
ISSN: 03787788
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa37348
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spelling 2020-07-26T16:54:02.0860966 v2 37348 2017-12-07 Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage 13dc152c178d51abfe0634445b0acf07 0000-0002-6894-2251 Eifion Jewell Eifion Jewell true false 8f619d25f6c30f8af32bc634e4775e21 Jonathon Elvins Jonathon Elvins true false 0e3f2c3812f181eaed11c45554d4cdd0 0000-0003-1101-075X Justin Searle Justin Searle true false 2017-12-07 MECH Transpired solar collectors (TSC) are an efficient means of building heating but due to the demand/use mismatch their capabilities are maximised when paired with a suitable storage technology. The Hydration and/dehydration of inorganic salts provides an appropriate energy storage medium which is compatible with the air temperature provided by a conventional TSC (<70 °C). The study reports on technical appraisal of materials which are compatible with building scale energy storage installations. Two salts (CaCl2, and LiNO3) were impregnated into porous vermiculite to form a salt in matrix (SIM). Their performance during the discharge portion of the cycle at high packing density was examined using a laboratory scale reactor. Reactor and exit temperature increases were considerably lower than those predicted from first principles. Peak reactor temperature rises of only 14 °C were observed with a reduction in temperature output from this initial peak over 60 hours. Poor salt utilization resulting from deliquescence near the reactor inlet was identified as being the source of the reduced performance. Changes in reactor size, orientation and cycling between input periods of moist and dry air did not improve reactor performance. The investigation has identified that moist air transit through the packed SIM reactor column is limited to approximately 100 mm from the air inlet. This has implications for reactor design and the operation of any practical building scale installation. Predictions of building scale energy storage capabilities based on simple scaling of laboratory test considerably under estimate the volume and complexity of equipment required. Journal Article Energy and Buildings 162 109 120 03787788 Thermochemical storage; salt hydration; transpired solar collector 31 12 2018 2018-12-31 10.1016/j.enbuild.2017.11.068 COLLEGE NANME Mechanical Engineering COLLEGE CODE MECH Swansea University 2020-07-26T16:54:02.0860966 2017-12-07T09:30:31.1816239 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering R.J. Sutton 1 Eifion Jewell 0000-0002-6894-2251 2 Jonathon Elvins 3 Justin Searle 0000-0003-1101-075X 4 P. Jones 5 0037348-12012018102702.pdf sutton2017v4.pdf 2018-01-12T10:27:02.4000000 Output 1241703 application/pdf Accepted Manuscript true 2018-12-05T00:00:00.0000000 true eng
title Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage
spellingShingle Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage
Eifion Jewell
Jonathon Elvins
Justin Searle
title_short Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage
title_full Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage
title_fullStr Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage
title_full_unstemmed Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage
title_sort Characterising the discharge cycle of CaCl 2 and LiNO 3 hydrated salts within a vermiculite composite scaffold for thermochemical storage
author_id_str_mv 13dc152c178d51abfe0634445b0acf07
8f619d25f6c30f8af32bc634e4775e21
0e3f2c3812f181eaed11c45554d4cdd0
author_id_fullname_str_mv 13dc152c178d51abfe0634445b0acf07_***_Eifion Jewell
8f619d25f6c30f8af32bc634e4775e21_***_Jonathon Elvins
0e3f2c3812f181eaed11c45554d4cdd0_***_Justin Searle
author Eifion Jewell
Jonathon Elvins
Justin Searle
author2 R.J. Sutton
Eifion Jewell
Jonathon Elvins
Justin Searle
P. Jones
format Journal article
container_title Energy and Buildings
container_volume 162
container_start_page 109
publishDate 2018
institution Swansea University
issn 03787788
doi_str_mv 10.1016/j.enbuild.2017.11.068
college_str Faculty of Science and Engineering
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hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Mechanical Engineering
document_store_str 1
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description Transpired solar collectors (TSC) are an efficient means of building heating but due to the demand/use mismatch their capabilities are maximised when paired with a suitable storage technology. The Hydration and/dehydration of inorganic salts provides an appropriate energy storage medium which is compatible with the air temperature provided by a conventional TSC (<70 °C). The study reports on technical appraisal of materials which are compatible with building scale energy storage installations. Two salts (CaCl2, and LiNO3) were impregnated into porous vermiculite to form a salt in matrix (SIM). Their performance during the discharge portion of the cycle at high packing density was examined using a laboratory scale reactor. Reactor and exit temperature increases were considerably lower than those predicted from first principles. Peak reactor temperature rises of only 14 °C were observed with a reduction in temperature output from this initial peak over 60 hours. Poor salt utilization resulting from deliquescence near the reactor inlet was identified as being the source of the reduced performance. Changes in reactor size, orientation and cycling between input periods of moist and dry air did not improve reactor performance. The investigation has identified that moist air transit through the packed SIM reactor column is limited to approximately 100 mm from the air inlet. This has implications for reactor design and the operation of any practical building scale installation. Predictions of building scale energy storage capabilities based on simple scaling of laboratory test considerably under estimate the volume and complexity of equipment required.
published_date 2018-12-31T03:47:02Z
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