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Thermal performance of granular PCM and development of salt hydrate eutectics for air conditioning.

Number: pap. O11

Author(s) : PINNAU S., EFIMOVA A., MISCHKE M., et al.

Summary

The granular phase change material (PCM) Rubitherm PK 6 has been investigated for the application of cold water supply in air conditioning systems. It is a compound of paraffin and a plastic matrix with granule sizes of about 5 mm. The PCM is used as a packed bed with water as heat transfer fluid. Experimental results show high performances compared to previous measurements with other macro scale encapsulations like spheres and plastic pouches. In addition a systematic search for binary and ternary eutectics of inorganic salts and salt hydrates with melting temperatures between 4 and 25°C has been performed by means of differential scanning calorimetry (DSC). Here, the ternary system of Zn(NO3)2-6 H2O, Mn(NO3)2-4 H2O and KNO3 with an melting temperature range 18-21°C is presented. Suitable nucleating and thickening agents have been found and tested to prevent the mixture from subcooling and phase separation.

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Pages: 8 p.

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Details

  • Original title: Thermal performance of granular PCM and development of salt hydrate eutectics for air conditioning.
  • Record ID : 30004984
  • Languages: English
  • Source: 10th International Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Kobe, Japan, July 29-August 1, 2012.
  • Publication date: 2012/07/01

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