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Improvement of energy efficiency of cascading sorption machines.

Author(s) : SATZGER P., BERLITZ T., ZIEGLER F., STITOU D., SPINNER B.

Summary

Presently available commercial absorption chillers reach COPs of about 1.2. If, for power demand side reasons, cooling by direct-fired absorption chillers is promoted, it is evident that the COP and the primary energy ratio of absorption chillers must be improved. One promising way to attain this goal is to use high-temperature driving heat, as it is always available when fossil fuels are being burned. Multi-effect cycles make it possible to use these high temperatures efficiently, but the heavy corrosion problems with ordinary sorption fluids in the past prevented the realisation of these cycles. In cascading cycles, which allow to employ different working pairs in the different cycles, the use of solid sorption systems as high-temperature topping cycles can avoid these corrosion problems. General considerations for optimization of cascading cycles are presented. Numerical data for a cascading cycles are presented. Numerical data for a cascading triple-effect system, which is being realized in a French-German cooperation, are presented.

Details

  • Original title: Improvement of energy efficiency of cascading sorption machines.
  • Record ID : 1998-0251
  • Languages: English
  • Source: Ab-sorption 96. Towards sustainable technologies. Proceedings./ Ab-sorption 96. Vers les technologies durables. Comptes rendus.
  • Publication date: 1996/09/17
  • Document available for consultation in the library of the IIR headquarters only.

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