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

Authors
Jeon, YongseokJung, JonghoKim, DongwooKim, SunjaeKim, Yongchan
Issue Date
1-11월-2017
Publisher
ELSEVIER SCI LTD
Keywords
Ejector-expansion air conditioner; Two-phase ejector; Optimization; CSPF
Citation
APPLIED ENERGY, v.205, pp.761 - 768
Indexed
SCIE
SCOPUS
Journal Title
APPLIED ENERGY
Volume
205
Start Page
761
End Page
768
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/81618
DOI
10.1016/j.apenergy.2017.08.059
ISSN
0306-2619
Abstract
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.
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