摘要
为研究压缩机等熵效率、系统过热度和过冷度等关键因素对高温热泵系统性能的影响,本文构建适用于热泵循环的ASPEN HYSYS仿真模型,采用动态模拟与静态模拟相结合的方式对模型进行模拟研究。结果表明,动态模拟过程在200 s时基本稳定,其稳定值与静态模拟输出值基本一致;当过热度、过冷度、压缩机等熵效率增加时,系统性能系数也增加;且过冷度每增加1℃,制热系数约提升0.05,而过热度增加1℃,制热系数仅提升约0.01;绝热效率90%,过热度与过冷度均取8℃时,系统得到最大制热系数为3.31。当过热度降低、压缩机绝热效率增加时,可有效降低排气温度;绝热效率90%,过热度取5℃时,压缩机得到最小排气温度108.8℃;相较于过热度与过冷度,压缩机等熵效率对系统性能影响更明显。因此适当增加过冷度、提升压缩机等熵效率,合理降低过热度可以有效提高热泵性能。
This paper investigates the influence of key factors such as the isentropic efficiency of the compressor,system superheat,and subcooling on the performance of high-temperature heat pump systems.An ASPEN HYSYS simulation model,suitable for heat pump cycles,is developed,and dynamic and static simulations are conducted to analyze the performance of the system.The results show that the dynamic simulation stabilizes at 200 s,with the stability value aligning closely with that of the static simulation.The coefficient of performance(COP)of the system increases with the superheat,supercooling,and isentropic efficiency of the compressor.Specifically,the COP increases by approximately 0.05 for every 1℃increase in supercooling degree and by approximately 0.01 for every 1℃increase in superheat degree.The maximum COP of the system reaches 3.31 when the adiabatic efficiency is 90%and the superheat and supercooling degrees are set at 8℃.Reducing superheat and increasing the adiabatic efficiency of the compressor effectively lowers the exhaust temperature.For example,with a 90%adiabatic efficiency,the minimum exhaust temperature of the compressor is 108.8℃when the superheat is 5℃.Compared with the superheat and supercooling degrees,the influence of the isentropic efficiency of the compressor is more evident.Therefore,the performance of the heat pump can be effectively enhanced by appropriately increasing the supercooling degree,improving the isentropic efficiency of the compressor,and reasonably reducing the superheat.
作者
赵雨菲
范静波
李勇
宋春雨
谢公南
马素霞
ZHAO Yufei;FAN Jingbo;LI Yong;SONG Chunyu;XIE Gongnan;MA Suxia(College of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Coking Coal Group Senyuan Energy Saving and Environmental Protection Co.,Ltd.,Taiyuan 030032,China;Key Laboratory of Cleaner Intelligent Control on Coal&Electricity,Ministry of Education,Taiyuan 030024,China;School of Marine Science and Technology,Northwestern Polytechnical University,Xi′an 710072,China)
出处
《哈尔滨工程大学学报》
北大核心
2025年第9期1902-1909,共8页
Journal of Harbin Engineering University
基金
山西省重点研发计划(202302060301008).
关键词
高温热泵
单螺杆压缩机
等熵效率
过热度
过冷度
排气温度
循环性能
动静态模拟
high-temperature heat pump
single screw compressor
isentropic efficiency
degree of superheat
degree of supercooling
exhaust temperature
cycle performance
dynamic and static simulations
