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Passive cooling ceiling system using eutectic (PCM) solutions.

Author(s) : URE Z.

Summary

The nocturnal cooler can be used to charge the latent heat capacity of various "positive temperature eutectic" solutions between 4 and 117 °C without using any refrigeration machinery by simply allowing the surrounding air to freeze these solutions. Later, the energy stored by the Positive Eutectic Thermal Energy Storage (PETES) can be released back into the occupied space during daytime to handle the heat gains. This technique is generally called passive cooling and it may enable the charging process to take place by means of free cooling, i.e. without running the chillers, and as a result becomes a very economical and environmentally friendly system. Furthermore, PETES opens up new opportunities to explore heat balance for existing and new systems, which could offer significant overall system efficiency improvements. Privatization has created a new kind of energy market whereby the period of energy usage and the type of energy used is becoming the main criteria for price structuring rather than overall energy consumption. Hence, cooling systems must be designed to provide sufficient flexibility for load shifting and a PETES Thermal Energy Storage technique can be considered as a useful tool to achieve this aim. The paper is extended to investigate the passive cooling TES systems in the form of eutectic PETES 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: Passive cooling ceiling system using eutectic (PCM) solutions.
  • Record ID : 2005-0196
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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