Supercooling stability of sodium acetate trihydrate composites in multiple heat storage unitsS

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    Abstract

    Keeping sodium acetate trihydrate (SAT) in supercooled state can be utilized to store heat loss free over long periods. The main risk with this technology is that the SAT may crystalize spontaneously and release the stored heat before desired.
    A test rig with 10 marketed heat storage units with water and 35 kg sodium acetate trihydrate composite was built and multiple heating and cooling cycles were carried out with the units. It was monitored if the sodium acetate trihydrate remained supercooled in the 3 days storage period or if the solidification started spontaneously. The units were charged with an inlet temperature of 87⁰C, and then discharged with inlet temperatures of 14⁰C, 22⁰C, 28⁰C or 35⁰C. Spontaneous solidifications occurred more frequently during
    discharge in the test cycles with lower discharge temperatures compared to higher inlet temperatures.
    Original languageEnglish
    Title of host publicationProceedings of the 12th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning
    PublisherInternational Institute of Refrigeration
    Publication date2018
    Pages227-231
    Article number0031
    DOIs
    Publication statusPublished - 2018
    Event12th IIR Conference on Phase Change Materials and Slurries for Refrigeration and Air Conditioning (PCM2018) - Orford Musique, Orford, Canada
    Duration: 21 May 201823 May 2018
    http://pcm2018.evenement.usherbrooke.ca/index.html

    Conference

    Conference12th IIR Conference on Phase Change Materials and Slurries for Refrigeration and Air Conditioning (PCM2018)
    LocationOrford Musique
    Country/TerritoryCanada
    CityOrford
    Period21/05/201823/05/2018
    Internet address

    Keywords

    • Sodium acetate trihydrate
    • Supercooling
    • Long-term heat storage
    • Experimental testing
    • Spontaneous crystallization

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    • PCM2018

      Mark Dannemand (Speaker)

      21 May 201823 May 2018

      Activity: Talks and presentationsConference presentations

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