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Salt impregnated carbon fibres as the reactive medium in a chemical heat pump: the NH3-CoCl2 system.

Author(s) : AIDOUN Z., TERNAN M.

Type of article: Article

Summary

Some of the best heat transfer results with chemical heat pumps have been obtained using chloride salts intercalated into graphite. This work examined an impregnation technique that produced cobalt chloride salt crystals dispersed on carbon fibres. Ammonia was used as both the reagent for the inter-conversion of CoCl2.2NH3 and CoCl.6NH3 compounds and as the refrigerant. The performance of the salt-fibre material was evaluated in experiments. The reactor was weighed continuously during the decomposition reaction, thereby providing an instantaneous measurement of the reaction rate that was independent of heat transfer measurements. The results obtained in this work are within the range of power densities reported previously using more complex intercalated graphite materials. This indicates that the simpler impregnation preparation method may produce materials that are suitable for practical chemical heat pumps.

Details

  • Original title: Salt impregnated carbon fibres as the reactive medium in a chemical heat pump: the NH3-CoCl2 system.
  • Record ID : 2003-0772
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 22 - n. 10
  • Publication date: 2002/07

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