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Thermodynamic analysis of a sorption refrigeration system with and without internal heat recovery

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  • K. Naga Malleswara Rao
  • M. Ram Gopal
  • Souvik Bhattacharyya

Abstract

Results obtained from thermodynamic analysis of a solid sorption refrigeration system with and without internal heat recovery (IHR) employing ammonia as the refrigerant are presented. Four combinations of salts, namely MgCl 2 /SrCl 2 , MgCl 2 /CaCl 2 , CaCl 2 /SrCl 2 and CaCl 2 /CaCl 2 , are studied for systems with internal recovery. The system chosen is the one that can produce ice at −10°C using a waste heat source available at 613 K. Energy and entropy balance equations are applied to analyse each of the processes to estimate the individual heat transfer and entropy generation rates for all the systems. Effects of the sorbent and reactor mass are duly considered. Results show that among the four combinations studied, CaCl 2 /CaCl 2 cycle yields the highest coefficient of performance and specific cooling output per kilogram of the salt. Cooling/heating of the generator/absorber results in significant entropy generation in all the systems. IHR improves the performance significantly. Copyright , Oxford University Press.

Suggested Citation

  • K. Naga Malleswara Rao & M. Ram Gopal & Souvik Bhattacharyya, 2012. "Thermodynamic analysis of a sorption refrigeration system with and without internal heat recovery," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 8(2), pages 124-133, January.
    • Handle: RePEc:oup:ijlctc:v:8:y:2012:i:2:p:124-133
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    File URL: http://hdl.handle.net/10.1093/ijlct/cts006
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