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Performance analysis of advanced hybrid GAX cycles: HGAX.

Author(s) : KANG Y. T., HONG H., PARK K. S.

Type of article: Article, IJR article

Summary

The objectives of this study were to develop advanced hybrid GAX cycles (HGAX) using NH3-H2O by combining absorption and vapour compression cycles, and to perform parametric analysis of system pressures and component sizes for performance enhancement. Four different HGAX cycles are developed Type A (performance improvement), Type B (low-temperature applications) Type C (reduction of desorption temperature) and Type D (hot-water-temperature applications). A compressor was placed between the evaporator and the absorber in Type A and Type B, and placed between the desorber and the condenser in Type C and Type D. It was found that the COP can be improved by 24% compared with the standard GAX cycle (in Type A) and an evaporation temperature of as low as -80 °C can be obtained from the HGAX cycle (Type B). In Type C, the maximum desorption temperature can be reduced down to 164 °C. Therefore, the corrosion problem, which becomes severe at temperatures above 200 °C, can be completely eliminated. The maximum desorption temperature for the standard GAX cycle ranges from 190 to 200 °C. In Type D, a hot water temperature as high as 106 °C could be obtained. Therefore, Type D can be applied to space heating and panel or floor heating applications.

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Pages: 442-448

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Details

  • Original title: Performance analysis of advanced hybrid GAX cycles: HGAX.
  • Record ID : 2004-1677
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 27 - n. 4
  • Publication date: 2004/06

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