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Positive temperature eutectic (PCM) thermal energy storage systems.

Author(s) : URE Z.

Summary

Water/ice thermal energy storage (TES) has the advantage of universal availability, low cost and transport ability through other system components. However, a conventional water-based TES system for air-conditioning applications requires low-temperature chillers and therefore standard water chillers must be replaced with low-temperature glycol chillers which operate at a lower evaporation temperature. The disadvantages of a conventional HVAC chiller and ice (water ice) storage system can be overcome by utilizing the latent heat capacity of various "eutectic" mixtures without the need for minus circulation temperatures. Plus temperature thermal energy storage PlusICE not only enables the designer to utilize existing chiller technology: this technique also enables the charging process to take place possibly by means of free cooling, i.e. without running the chillers. The paper is extended to investigate the alternative TES systems in the form of eutectic PlusICE solutions. The results of performance tests for various temperature ranges as well as practical application guidance are also incorporated in the paper.

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Details

  • Original title: Positive temperature eutectic (PCM) thermal energy storage systems.
  • Record ID : 2005-0193
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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