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The influence of different water-injection methods on water vapor high temperature heat pump.

Number: No 135

Author(s) : WU D., HU B., WANG R. Z.

Summary

To yield higher temperature output and better performance, a high temperature heat pump with water refrigerant is developed and the corresponding prototype is established. Water-injection is adopted to reduce the discharge superheat. The theoretical results show that compared with HFO and HC refrigerants and traditional HFC refrigerant, water has better performance when the condensation temperature is above 100°C. With the increase of the condensation temperature, the simulation performance of water vapor heat pump is better, which means water is more suitable for higher temperature application fields. Based on the experimental investigation, the system performance with different injection lines and ports are compared. Its start-up and dynamic performance present that this heat pump reaches steady-state in 10 minutes and waterinjection can effectively decrease the discharge temperature. The internal injection line can realize the selfadjustment of injected-water and discharge temperature. The coefficient of performance of this heat pump with internal water-injection is better than that of external. 

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Pages: 9 p.

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Details

  • Original title: The influence of different water-injection methods on water vapor high temperature heat pump.
  • Record ID : 30030003
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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