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IIR document

Natural working fluids for solar-boosted heat pumps.

Author(s) : CHAICHANA C., AYE L., CHARTERS W. W. S.

Type of article: Article, IJR article

Summary

The option of using natural working fluids as substitutes for R22 for solar-boosted heat pumps depends not only upon thermal performance and hazardous rating but also on potential impacts on the environment. This article presents the comparative assessment of natural working fluids with R22 in terms of their characteristics and thermophysical properties, and thermal performance. Some justification is given for using natural working fluids in a solar boosted heat pump water heater. The results show that R744 is not suitable for solar-boosted heat pumps because of its low critical temperature and high operational pressures. On the other hand, R717 seems to be a more appropriate substitute in terms of operational parameters and overall performance. However, major changes in the heat pumps are required. R290 and R1270 are identified as candidates for direct drop-in substitutes for R22.

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Format PDF

Pages: 637-643

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Details

  • Original title: Natural working fluids for solar-boosted heat pumps.
  • Record ID : 2004-0425
  • Languages: English
  • Subject: General information
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 26 - n. 6
  • Publication date: 2003/09

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