曹锋

Date:

2025-04-30

Title of Paper:

Investigation of the performance of a high-temperature heat pump using parallel cycles with serial heating on the water side

Journal:

International Journal of Refrigeration

Summary:

High-temperature heat pumps can be widely utilized for industrial heating as an energysaving
method due to their high condensing temperatures. This paper describes a cycle
analysis and experimental study on the performance of a high-temperature heat pump
(HTHP) system. The performance comparisons are conducted using performance calculations
among the parallel cycles with serial heating on the water side, a two-stage
compression cycle and a single-stage cycle. The results show that the performance of the
heat pump using parallel cycles with serial heating is the best when the condensing
temperature exceeds 75
C. Based on the cycle analysis, a prototype HTHP using parallel
cycles with serial heating on the water side with a heating capacity of 700 kW was built in
this study. Also, a screw compressor was modified due to the high-temperature conditions.
The measured performance shows that the HTHP can stably provide an outlet water
temperature of up to 85
C with a high coefficient of performance (COP). The experimental
results indicate that the average heating capacity and coefficient of performance of the
HTHP could be improved significantly in high-temperature conditions due to the parallel
cycles with serial heating on the water side and the modified compressor. All the results
indicate that the HTHP using parallel cycles and modified compressor with serial heating
on the water side is very competitive in industrial heating applications.

Co-author:

Kai wang, Feng Cao，Ziwen Xing

Translation or Not:

No

Date of Publication:

2010-03-09