Development of seasonal heat storage based on stable supercooling of a sodium acetate water mixture

Publication: Research - peer-reviewConference article – Annual report year: 2012

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A number of heat storage modules for seasonal heat storages based on stable supercooling of a sodium acetate water mixture have been tested by means of experiments in a heat storage test facility. The modules had different volumes and designs. Further, different methods were used to transfer heat to and from the sodium acetate water mixture in the modules.

By means of the experiments:
• The heat exchange capacity rates to and from the sodium acetate water mixture in the heat storage modules were determined for different volume flow rates.
• The heat content of the heat storage modules were determined.
• The reliability of the supercooling was elucidated for the heat storage modules for different operation conditions.
• The reliability of a cooling method used to start solidification of the supercooled sodium acetate water mixture was elucidated. The method is making use of boiling CO2 in a small tank in good thermal contact with the outer
surface of the heat storage module.
• Experience on operation of the heat storage modules was gained.

Based on the investigations recommendations for future development of a seasonal heat storage based on stable supercooling of a sodium acetate water mixture are given.
Original languageEnglish
JournalEnergy Procedia
Publication date2012
Volume30
Pages260-269
ISSN1876-6102
DOIs
StatePublished

Conference

Conference International Conference on Solar Heating and Cooling for Buildings and Industry
CountryUnited States
CitySan Francisco
Period09/07/1211/07/12
CitationsWeb of Science® Times Cited: 0

Keywords

  • PCM, Sodium acetate, Supercooling, Seasonal heat storage, Heat storage modules, Laboratory tests
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