摘要
本文引入新开发的可调喷射器对跨临界CO_2热泵系统性能进行了理论和实验研究。建立系统部件的模型,以制冷剂侧为主线,建立整个系统模型,分析高压侧压力对制热系数、制热量、喷射系数和升压比等参数影响。为验证系统理论模型的合理性,在自行搭建的实验台上通过喷针调节喷射器的喉部面积改变高压侧压力对系统性能开展实验研究。实验与模拟结果表明,稳定运行在最优高压侧压力对热泵系统具有十分重要的意义,不仅系统性能大幅提高,而且保证了热水的出水温度。
This article presents both theoretical and experimental investigations on the performance of the transcritical CO2 heat pump system with a new-type adjustable ejector. System components are modelled individually and the modules are linked with interface variables on the refrigerant-side. The effects of the high-side pressure on the heating coefficient of performance （COPh）, heating capacity, entrainment ratio and pressure lift are evaluated. To prove the model reasonable, experiments are carried out to show the effects of the high-side pressure on the system performance. The theoretical and experimental results show that working in the optimal high-side pressure is very important for the CO2 heat pump system, not only improves system performance significantly, but also ensures hot water temperature.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2013年第2期201-204,共4页
Journal of Engineering Thermophysics
基金
重庆市自然科学基金项目(No.CSTC2011BB6094)
关键词
可调喷射器
CO2
跨临界
热泵
adjustable ejector
C02
transcritical
heat pump
