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Experimental study on a water and air source high-temperature heat pump using a low GWP refrigerant.

Number: pap. n. 1815

Author(s) : WATANABE C., NAKAMURA T., YAMADA M., et al.

Summary

A high-temperature heat pump using a low GWP refrigerant, such as R1234yf or R454C, were experimentally investigated to supply hot water. The temperature of hot water ranged from 45 °C to 90 °C for R1234yf and ranged from 45 °C to 75 °C for R454C, while the temperature of supplied water ranged from 6 °C to 24 °C. The temperature of heat sources ranged from 7 °C to 25 °C. Degrees of sub-cooling of sub-critical heat pump cycles ranged from 10 °C to 70 °C because large temperature-rise was needed to heat supplied water. A test apparatus and measurement system were presented. The test results using R1234yf and a water-source evaporator were discussed in comparison with the test results of the former work using R1234yf and an air-source evaporator. The test results using R1234yf and a water-source evaporator were discussed in comparison with the test results using R454C.

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Pages: 8

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Details

  • Original title: Experimental study on a water and air source high-temperature heat pump using a low GWP refrigerant.
  • Record ID : 30026550
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1815

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