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Evaluation of metal hydride machines for heat pumping and cooling applications.

Author(s) : WILLERS E., GROLL M.

Type of article: Article, IJR article

Summary

Three different schemes of metal hydride solid sorption devices for heat pumping and cooling applications are presented and compared based on theoretical evaluation. Key parameters obtained from experimental and simulation results from coupled metal hydride reaction beds have been used for the theoretical evaluation. The single (HS) and double stage (HD) devices show reasonable performances, but they require many moving parts. Using high performance reaction beds, e.g. a capillary tube bundle reaction bed, cycle times of about 5-10 minutes can be obtained with these devices. This corresponds to a specific power output of 100-200 watts/kilogramme (HS) or 150-300 watts/kilogramme (HD), referred to the total hydride inventory of the machine. The multi-hydride-thermal-wave system has a lower specific power output, but it offers significant advantages like modest hardware effort, low pumping power and a very wide operating temperature range.

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Pages: 47-58

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Details

  • Original title: Evaluation of metal hydride machines for heat pumping and cooling applications.
  • Record ID : 1999-0835
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 22 - n. 1
  • Publication date: 1999/01

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