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Experimental testing of a storage tank filled with microencapsulated PCM slurries.

Author(s) : HEINZ A., STEICHER W.

Summary

The idea to use phase change materials (PCM) for the purpose of thermal energy storage is to make use of the latent heat of a phase change, usually between the solid and the liquid state. If such materials are microencapsulated (diameter 5-20 µm) and mixed with a heat carrier fluid (e.g. water), they form a so-called PCM-slurry. These dispersions can be pumped and used as heat transport (and storage) fluids. In this paper the authors present the results of the experimental work that was carried out within an European project with a PCM slurry from BASF with a melting point at about 60°C. Slurries of different concentrations were tested as the heat storage fluid in a storage tank with a volume of 200 litres which was charged/discharged with different types of heat exchangers. The heat transfer coefficients both for natural (internal heat exchanger) and forced convection (external flat plate heat exchanger) were analysed for different concentrations of the slurry and compared to those of water.

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Details

  • Original title: Experimental testing of a storage tank filled with microencapsulated PCM slurries.
  • Record ID : 2006-2967
  • Languages: English
  • Source: Proceedings of the sixth Workshop on Ice Slurries of the IIR/Proceedings of the Second Conference on Phase Change Material and Slurry (PCM 2005).
  • Publication date: 2005/06/15

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