单级跨临界CO2地源热泵性能研究  

Performance Study of Transcriticial CO2 Ground Source Heat Pump

作　　者：王彦杰 刘雄[1] 钱亚中 叶志成 祝铭 李林蔚 WANG Yan-jie;LIU Xiong;QIAN Ya-zhong;YE Zhi-cheng;ZHU Ming;LI Lin-wei(School of Building Services Science and Engineering,Xi’an University of Architecture&Technology)

机构地区：[1]西安建筑科技大学建筑设备科学与工程学院,710055

出　　处：《建筑热能通风空调》2020年第4期16-19,共4页Building Energy & Environment

摘　　要：针对运行能耗高的恒温恒湿空气处理机组,本文提出了一种驱动其运行的二氧化碳跨临界地源热泵系统,并通过建立系统热力学计算模型,研究了室外新风温度、新风比、地埋管进口水温、压缩机排气压力四个因素对系统冬季运行性能的影响。计算结果表明,新风比是影响系统性能的主要因素,压缩机排气压力次之,地埋管进口水温的影响最小,系统性能随着室外新风温度的升高呈下降的趋势,随着新风比的升高呈近似直线的上升趋势,而且室外新风温度越低,对系统性能的影响越大。A new type of single-stage transcriticial carbon dioxide ground source heat pump system is proposed for a constant temperature and humidity air handling unit with high energy consumption. By establishing thermodynamic calculation models, the factors such as outdoor fresh air temperature, fresh air ratio, water temperature at the entrance of buried pipes and compressor discharge pressure on the performance of the system are studied during winter operation.The results show that the fresh air ratio has a greater impact on the system performance, followed by the compressor discharge pressure, and water temperature at the entrance of buried pipes has the smallest impact. The system performance decreases with the increase of outdoor fresh air temperature, and it also shows an approximately linear upward trend with the increase of fresh air ratio, besides, the lower the outdoor fresh air temperature, the greater the impact on the system performance.

关 键 词：地源热泵 性能系数 恒温恒湿 二氧化碳 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]