冷源冷量对压缩/喷射制冷系统性能影响的实验研究  

Experimental study of cooling capacity on performance of bi-evaporator compression/ejection refrigeration system

作　　者：刘华东[1,2] 李哲[1,2] 魏新利[1] 史海路[1,2] 党毫 张羽翔 Liu Huadong;Li Zhe;Wei Xinli;Shi Hailu;Dang Hao;Zhang Yuxiang(School of Mechanical Engineering,Zhengzhou University,Zhengzhou 450001,China;Research Center on the Technology and Equipment for Energy Saving in Thermal Energy System,Ministry of Education,Zhengzhou 450001,China)

机构地区：[1]郑州大学机械与动力工程学院,郑州450001 [2]热能系统节能技术与装备教育部工程研究中心,郑州450001

出　　处：《低温与超导》2021年第1期58-65,共8页Cryogenics and Superconductivity

基　　金：河南省高等学校重点科研项目(16A470002)资助。

摘　　要：实验研究了喷射器的最优喷嘴距及在此条件下,冷凝器进水冷量对喷射器及双蒸发压缩/喷射制冷系统性能的影响,同时对双蒸发压缩/喷射制冷系统与蒸汽压缩制冷系统进行了对比研究。结果表明:喷射器引射系数随冷凝器进水冷量的增大而减小,喷射器升压比随冷凝器进水冷量的增大而增大;双蒸发压缩/喷射制冷系统COP_(P)随冷凝器进水冷量的增加先快速增加后缓慢减小,冷凝器进水冷量存在一个合理值,当冷凝器进水冷量控制在17.81 kW时,系统性能最好;高温蒸发器的制冷量约占系统总制冷量的88%,低温蒸发器的制冷量约占系统总制冷量的12%;在不同的冷凝器进水冷量下,双蒸发压缩/喷射制冷系统比蒸汽压缩制冷系统COP提高约36%左右。The effects of condenser inlet water cooling capacity on the performance of ejector and bi-evaporator compression/ejection refrigeration cycle(BCERC) were experimentally investigated at the optimal nozzle exit position. A comparative study between the BCERC system and the vapor compression refrigeration cycle(VCRC) system under the same external operating conditions was conducted. Results show that the ejector entrainment ratio(ER) decreases with the rising of condenser inlet water cooling capacity. The pressure lift ratio(PLR) of ejector increases with the rising of condenser inlet water cooling capacity. The COP_(P) of BCERC system increases rapidly and peaks at the condenser inlet water cooling capacity of 17.81 kW with the maximum COP_(P). Continuing to increase the condenser inlet water cooling capacity, the COP_(P) starts to decrease slowly. The refrigerating capacity of the high-temperature evaporator accounts for about 88% of the total refrigerating capacity of the system, and that of the low-temperature evaporator accounts for about 12% of the total refrigerating capacity of the system. The BCERC system performs better than the VCRC system under different condenser inlet water cooling capacities, and COP can increase by 36%.

关 键 词：冷量 喷射器 双蒸发压缩/喷射制冷 系统性能 

分 类 号：TK11[动力工程及工程热物理—热能工程]