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Thermodynamic simulation of alternative absorption heat pumping processes using natural working fluids.

Author(s) : KOTENKO O., MOSER H., RIEBERER R.

Type of article: Article, IJR article

Summary

Three groups of alternative absorption heat pumping processes (AHP) with different natural working fluids are being analyzed in this paper: absorption heat transformer (AHT) process using partially miscible working mixtures; AHP-processes using a condensable auxiliary fluid (Einstein–Szilard cycle, Rojey cycle); NH3/H2O-AHP-process using strong bases as additives (e.g. NaOH). The thermodynamic simulations have shown that a NH3/H2O absorption cycle using a strong base as additive seems to be promising for applications using low-grade heat sources and the Rojey cycle offers higher COPs than a conventional NH3/H2O-AHP at high generator temperatures and low temperature lifts. The investigated AHT-process and the Einstein–Szilard process seem presently not to be competitive compared to conventional technologies. At present, the influence of strong bases on a conventional NH3/H2O-AHP is being investigated at the Institute of Thermal Engineering, Graz University of Technology.

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Pages: 594-604

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Details

  • Original title: Thermodynamic simulation of alternative absorption heat pumping processes using natural working fluids.
  • Record ID : 30003510
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 35 - n. 3
  • Publication date: 2012/05

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