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 language | English |
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Pages (from-to) | 761-768 |
Number of pages | 8 |
Journal | Applied Energy |
Volume | 205 |
DOIs | |
Publication status | Published - 2017 Nov 1 |
Keywords
- CSPF
- Ejector-expansion air conditioner
- Optimization
- Two-phase ejector
ASJC Scopus subject areas
- Civil and Structural Engineering
- Energy(all)