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Performance optimization of high-temperature heat pump system for staged heating under large temperature span

Authors :
Huang Lumeng
Zhang Hao
Huang Zheng
Wang Lin
XU Jingyu
Zhang Guangzhi
Zhang Yanting
Source :
IOP Conference Series: Earth and Environmental Science. 766:012010
Publication Year :
2021
Publisher :
IOP Publishing, 2021.

Abstract

With the rise in the widespread application of high-temperature heat pump (HTHP) systems, the system temperature across the large volume, high condensing temperature, and sink unbalanced proportion of heat supply, and other characteristics of the HTHP system need to be optimized as the primary solution. To improve the thermodynamic performance of the system at high temperatures across the process, the effects of the intermediate cooling structure circulation mode and hierarchical heating on the HTHP system were analyzed in this work. Furthermore, the HTHP system was optimized by adjusting the appropriate diversion coefficients in order to improve its coefficient of performance (COP). The optimum value of COP and the corresponding coefficients of diversion for the different process requirements were calculated using R245fa as the refrigerant and perturbing the coefficients of diversion in combination with a simulated annealing algorithm. When the condensing temperature was between 120–140 °C, the COP of the optimized system was observed to be 15.93–20.48% higher than that of the traditional two-stage compression system, and the system was found to exhibit a significant unit heat production and refrigeration capacity.

Details

ISSN :
17551315 and 17551307
Volume :
766
Database :
OpenAIRE
Journal :
IOP Conference Series: Earth and Environmental Science
Accession number :
edsair.doi...........da50cc581ff37e28197f26bf9a1069a7
Full Text :
https://doi.org/10.1088/1755-1315/766/1/012010