Effects of ejector geometries on performance of ejector-expansion R410A air conditioner considering cooling seasonal performance factor

被引：44
作者：
Jeon, Yongseok [1 ]
Jung, Jongho [1 ]
Kim, Dongwoo [1 ]
Kim, Sunjae [1 ]
Kim, Yongchan [1 ]
机构：
[1] Korea Univ, Dept Mech Engn, Seoul 136713, South Korea
来源：
APPLIED ENERGY | 2017年 / 205卷
关键词：
Ejector-expansion air conditioner; Two-phase ejector; Optimization; CSPF; REFRIGERATION SYSTEM; 2-PHASE EJECTOR; CYCLE; DEVICE; OPTIMIZATION; MODES; WORK;
D O I：
10.1016/j.apenergy.2017.08.059
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The objective of this study was to investigate the effects of ejector geometries on the performance of an ejector expansion air conditioner (EEAC) considering the cooling seasonal performance factor (CSPF). The performance of the EEAC using R410A was measured and analyzed by varying the compressor speed, outdoor-bin temperature, operating pressures, nozzle-throat diameter, and mixing-section diameter. The EEAC in the medium capacity mode exhibited maximum coefficient of performance (COP) improvement, i.e., 7.5%, over the baseline (conventional) cycle. The optimum mixing-section diameter was determined to be 9 mm based on the CSPF. In addition, the optimum mixing-section diameter increased with an increase in the annual average outdoor temperature. The CSPF of the EEAC with the optimized mixing-section diameter improved in the range of 16.0-20.3% over the baseline cycle depending on the climatic conditions.
引用
收藏
页码：761 / 768
页数：8
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