制冷学报2024，Vol.45Issue(5)：105-113,9.DOI:10.12465/j.issn.0253-4339.2024.05.105
制热工况下跨临界CO2热泵最优排气压力的影响因素研究
Influencing Factors of Optimal Discharge Pressure of Transcritical CO2 Heat Pumps under Heating Conditions
武中凯 1郑泽灿 2宋昱龙 2曹锋 2毕菲菲 1费继友1
作者信息
- 1. 大连交通大学机车车辆工程学院 大连 116028
- 2. 西安交通大学能源与动力工程学院 西安 710049
- 折叠
摘要
Abstract
Optimal discharge pressure is the most important factor affecting the performance of a transcritical CO2 heat pump.In this study,the reasons for the optimal discharge pressure were theoretically analyzed based on the heat transfer pinch point.The factors influencing the optimal discharge pressure and their influence mechanism were determined by constructing a transcritical CO2 heat pump simulation model using the AMESim software.The model took into consideration the internal heat transfer pinch point of the gas cooler.Under inlet water temperature of 10℃-40℃,outlet water temperature of 60℃-90℃,and ambient temperature-30℃-25℃,the influence of inlet temperature,outlet temperature,ambient temperature,and heat recovery rate on the optimal discharge pressure was studied quantitatively.The results showed that the lower the inlet,outlet,and ambient temperatures,the lower the optimal discharge pressure of the system.Moreover,the optimal discharge pressure could be reduced by using an internal heat exchanger.The influence mechanism of each factor on the optimal discharge pressure was found to be closely related to the heat transfer pinch point and the physical properties of CO2 near the critical point and supercritical zone.The research results can provide a reference for the design and performance optimization of CO2 heat pump systems.关键词
跨临界CO2热泵/最优排气压力/传热夹点/回热率Key words
transcritical CO2 heat pump/optimal discharge pressure/heat transfer pinch point/heat recovery rate分类
通用工业技术引用本文复制引用
武中凯,郑泽灿,宋昱龙,曹锋,毕菲菲,费继友..制热工况下跨临界CO2热泵最优排气压力的影响因素研究[J].制冷学报,2024,45(5):105-113,9.
