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, Yong Chan Kim

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)761-768
Number of pages8
JournalApplied Energy
Volume205
DOIs
Publication statusPublished - 2017 Nov 1

Keywords

  • CSPF
  • Ejector-expansion air conditioner
  • Optimization
  • Two-phase ejector

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Energy(all)

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