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Experimental Study on Gas Cooler Heat Transfer Characteristics Applied in CO2 Supercritical Cycle Heat Pump Water Heater

[+] Author Affiliations
Yefeng Liu, Hua Zhang, Caoping Cai, Weidong Wu, Yingxia Qi

University of Shanghai for Science and Technology, Shanghai, China

Paper No. IHTC14-22357, pp. 323-329; 7 pages
  • 2010 14th International Heat Transfer Conference
  • 2010 14th International Heat Transfer Conference, Volume 4
  • Washington, DC, USA, August 8–13, 2010
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4939-2 | eISBN: 978-0-7918-3879-2
  • Copyright © 2010 by ASME


One CO2 heat pump water heater test apparatus was built in the paper. The heat transfer characteristics of CO2 in gas cooler with water in double-pipe heat exchanger was experimentally investigated. The effects of variation of cooling water flux on heat transfer characteristics, outlet temperature of water, COP and CO2 temperature were analyzed. The influences of cooling water flux to heat exchange about CO2 side, water side, and the CO2 and water temperature matching was analyzed. Experimental results showed that the supercritical CO2 heat pump water heater can acquire higher temperature of outlet water up to 80°C than those conventional Freon heat pump water heater, and the COP of the system increased with the increase of water flow rate through gas cooler. All the work was valuable for the application of CO2 heat pump water heater.

Copyright © 2010 by ASME



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