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Design and experimental results of a hybrid water/lithium bromide absorption-compression chiller.

Number: pap. n. 1202

Author(s) : HELM M., ECKERT T., SCHWEIGLER C.

Summary

Application of absorption chillers and heat pumps based on the working pair water/lithium bromide is limited by the requirement of high driving temperatures, limited temperature lift due to the risk of crystallization, and weak peak load capability at raised ambient temperatures. Increased flexibility is achieved when a mechanical vapor compressor is integrated in a conventional absorption cycle, forming a hybrid absorption/compression chiller. A pre-commercial design of the hybrid absorption/compression chiller is presented which can be operated in pure absorption mode and hybrid operation with variable contribution of a mechanical turbo compressor. Starting from the conventional design, the configuration of evaporator and absorber have been refined in order to avoid pressure drops in the vapor flow and entrainment of liquid refrigerant at the inlet of the compressor. Experimental results confirm the potential of the hybrid concept. Operating temperatures, electrical and thermal COP are used as figures of merit.

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Pages: 8

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Details

  • Original title: Design and experimental results of a hybrid water/lithium bromide absorption-compression chiller.
  • Record ID : 30026733
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1202
  • Notes:

    Keynote


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