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Thermodynamic cycle analysis of air-to-water CO2 heat pumps.

Author(s) : ZHANG L., GOPALNARAYANAN S., SIENEL T.

Summary

The objective of this study is to evaluate the performance of carbon dioxide (CO2) air-to-water heat pumps for hydronic space and service water heating applications. An analysis of 15 different cycle configurations is performed based on computer simulations. Results indicate that for both applications, the two-stage cycle with a phase separator offered the highest performance. For service heating, the incremental COP over the basic single-stage cycle is small (4.459 vs. 4.371) when heating water from 12 to 60°C at an outdoor temperature of 10°C. For hydronic space heating applications, the COP of the two-stage cycles with phase separator is up to 9% higher than the basic cycle (2.724 at an ambient temperature of 0°C while heating water from 30 to 60°C).

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Details

  • Original title: Thermodynamic cycle analysis of air-to-water CO2 heat pumps.
  • Record ID : 2007-1737
  • Languages: English
  • Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
  • Publication date: 2006/07/17

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