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

Yongseok Jeon, Jongho Jung, Dongwoo Kim, Sunjae Kim and Yongchan Kim

Applied Energy, 2017, vol. 205, issue C, 768 pages

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 9mm 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.

Keywords: Ejector-expansion air conditioner; Two-phase ejector; Optimization; CSPF (search for similar items in EconPapers)
Date: 2017
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Citations: View citations in EconPapers (14)

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DOI: 10.1016/j.apenergy.2017.08.059

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