曹锋

Date:

2025-04-30

Title of Paper:

Development and experimental validation of a high-temperature heat pump for heat recovery and building

Journal:

Energy and Buildings

Summary:

The performance of a high-temperature heat pump unit using geothermal water for heat recovery in
buildings is experimentally evaluated. The unit consists of a twin-screw refrigeration compressor, a
condenser, an evaporator and an oil cooling system. The effect of the cooled oil temperature on the
performance of the heat pump unit is experimentally investigated. Results show that the unit stably
produces outlet hot water at a constant temperature of 85 8C and performs well in a wide range of hightemperature
conditions with a high energy efficiency ratio. The results also indicate that the key to
improving the performance of a high-temperature heat pump unit often depend on the selection of
proper cooled oil temperature. The optimum cooled oil temperature is 50–65 8C when the condensing
temperature is above 70 8C. At these temperatures, the oil cooling system can increase the energy
efficiency ratio of the heat pump by 6.3%.

Co-author:

Kai wang, Feng Cao，Ziwen Xing

Translation or Not:

No

Date of Publication:

2009-02-17