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Experimental Study of Gas Cooler in Trans-Critical CO2 Refrigeration System

[+] Author Affiliations
Yingbai Xie, Yingfu Liu, Jiancheng Tang, Ganglei Sun

North China Electric Power University, Baoding, Hebei, China

Paper No. IMECE2009-11004, pp. 1061-1065; 5 pages
doi:10.1115/IMECE2009-11004
From:
  • ASME 2009 International Mechanical Engineering Congress and Exposition
  • Volume 9: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A, B and C
  • Lake Buena Vista, Florida, USA, November 13–19, 2009
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4382-6 | eISBN: 978-0-7918-3863-1
  • Copyright © 2009 by ASME

abstract

In this paper, the gas cooler in trans-critical CO2 refrigeration cycle system is studied experimentally. Research shows that: the temperature different between the inlet CO2 and the cooling water changes in a wide range as the heat rejection pressure changes, but the outlet CO2 temperature of the gas cooler is almost unchanged; the relative pressure drop is only about 1% when the heat rejection pressure is 9MPa in the system; with the increase of gas cooler exit temperature, the refrigerating capacity decreases linearly first, and the latter becoming more and more stable, but the compression work is linearly increased; on the experimental conditions, the COP decreased about 25% when the outlet temperature of the gas cooler ranged from 30°C to 37°C.

Copyright © 2009 by ASME

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