Laboratory Test of a Cylindrical Heat Storage Module with Water and Sodium Acetate Trihydrate

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Abstract

Cylindrical heat storage modules with internal heat exchangers have been tested in a laboratory. The modules were filled with water and sodium acetate trihydrate with additives. The testing focused on the heat content of the storage material and the heat exchange capacity rate during charge of the module. For the tests with the phase change materials, the focus was furthermore on the stability of supercooling and cycling stability. Testing the module with sodium acetate trihydrate and 6.4% extra water showed that phase separation increased and the heat released after solidification of supercooled phase change material was reduced over 17 test cycles. The heat released after solidification of the supercooled sodium acetate trihydrate with thickening agent and graphite was stable over the test cycles. Stable supercooling was obtained in 7 out of 17 test cycles with the module with sodium acetate trihydrate with extra water and in 6 out of 35 test cycles for the module with thickening agent.
Original languageEnglish
JournalEnergy Procedia
Volume91
Pages (from-to)122-127
ISSN1876-6102
DOIs
Publication statusPublished - 2016
Event4th International Conference on Solar Heating and Cooling for Buildings and Industry 2015 - Istanbul, Turkey
Duration: 2 Dec 20154 Dec 2015
Conference number: 4

Conference

Conference4th International Conference on Solar Heating and Cooling for Buildings and Industry 2015
Number4
CountryTurkey
CityIstanbul
Period02/12/201504/12/2015

Bibliographical note

© 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Peer-review by the scientific conference committee of SHC 2015 under responsibility of PSE AG

Keywords

  • Heat storage
  • Phase change material
  • Sodium acetate trihydrate
  • Supercooling

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