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Investigation of an air source heat pump water heating system working at wide temperature scale.

Number: pap. n. 325

Author(s) : CHEN J., CHEN Y., LUO X., et al.

Summary

Water heating represents significant energy use and accounts for a high proportion of total energy consumption in residential section. Air source heat pump water heater (ASHPWH) has been recognized as a very promising technology with advantages of energy-saving, safe in use, low cost, etc. The current heat pump systems are subjected to inefficient operation all year around. A novel ASHPWH is proposed for wide temperature scale. It consists of four different operating modes. The mathematical model is established and integrated with refrigerant properties from REFPROP. Results show that the switch strategies of ambient temperature for optimum COP are distinguished. At outlet water temperature of 41 °C, the switch ambient temperature is -18 °C and 16.5 °C for Mode A, Mode B and Mode D. Its application in typical cities has superior performance to each individual cycle. In Guangzhou, the proposed system shows the highest improvement. The experimental study of Mode C and Mode D indicates that the later one has better COP at ambient temperature of -25 °C and -12 °C.

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Pages: 8

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Details

  • Original title: Investigation of an air source heat pump water heating system working at wide temperature scale.
  • Record ID : 30026442
  • 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.2019.0325

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