摘要
中高温热能(65~100℃)在居民生活及工业生产中有着广泛的需求。常规单级蒸气压缩式热泵从环境吸热进行中高温大温跨供热时,系统效率低,压缩机运行工况差。为实现单级蒸气压缩式热泵高效大温跨供热,本文将低温制冷领域中能够高效拓展温跨的混合工质回热式节流技术应用到大温跨供热领域,提出了混合工质回热式大温跨热泵。围绕混合工质回热式大温跨热泵所开展的系列理论及试验研究工作,揭示系统压力工况、工质组分配比以及回热方式对于大温跨热泵系统的影响机制。自主设计研制的空气源混合工质回热式大温跨热泵,供热温度达到90.38℃时,系统压比小于3,COP为2.75,效率为27.66%。
Residential life and industrial production widely need the supply of the heat with medium-high temperature of 65℃to 100℃.Traditional single-stage vapor compression heat pumps suffer low efficiency and poor operation conditions during large temperature span heating of medium-high temperature through absorbing heat from environment.In order to achieve large temperature span heating by the single-stage vapor compression heat pump efficiently,the mixture recuperative throttling technology that can effectively broaden the temperature span in the field of cryogenic refrigeration is first introduced to the large temperature span heating,and the mixture recuperative heat pump with large temperature span is proposed.The serial theoretical and experimental studies are conducted on the proposed heat pump.The results reveal the impact mechanism of the pressure conditions,refrigerant composition,and the ways of recuperation on the system.For the self-designed and developed air source mixture recuperative heat pump with large temperature span prototype,when the heat supply temperature is 90.38℃,the pressure ratio of system is less than 3,COPis 2.75 and the exergy efficiency is 27.66%.
作者
孙守军
郭浩
公茂琼
Sun Shoujun;Guo Hao;Gong Maoqiong(Technical Institute of Physics and Chemistry,Chinese Academy of Sciences;University of Chinese Academy of Sciences)
出处
《制冷与空调》
2020年第10期90-96,共7页
Refrigeration and Air-Conditioning
关键词
空气源热泵
混合工质
回热循环
大温跨
air source heat pump
mixture
recuperative cycle
large temperature span
