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 |
|---|---|
| Pages (from-to) | 761-768 |
| Number of pages | 8 |
| Journal | Applied Energy |
| Volume | 205 |
| DOIs | |
| Publication status | Published - 2017 Nov 1 |
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Keywords
- CSPF
- Ejector-expansion air conditioner
- Optimization
- Two-phase ejector
ASJC Scopus subject areas
- Civil and Structural Engineering
- Energy(all)
Cite this
Effects of ejector geometries on performance of ejector-expansion R410A air conditioner considering cooling seasonal performance factor. / Jeon, Yongseok; Jung, Jongho; Kim, Dongwoo; Kim, Sunjae; Kim, Yong Chan.
In: Applied Energy, Vol. 205, 01.11.2017, p. 761-768.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of ejector geometries on performance of ejector-expansion R410A air conditioner considering cooling seasonal performance factor
AU - Jeon, Yongseok
AU - Jung, Jongho
AU - Kim, Dongwoo
AU - Kim, Sunjae
AU - Kim, Yong Chan
PY - 2017/11/1
Y1 - 2017/11/1
N2 - 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.
AB - 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.
KW - CSPF
KW - Ejector-expansion air conditioner
KW - Optimization
KW - Two-phase ejector
UR - http://www.scopus.com/inward/record.url?scp=85027570244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85027570244&partnerID=8YFLogxK
U2 - 10.1016/j.apenergy.2017.08.059
DO - 10.1016/j.apenergy.2017.08.059
M3 - Article
VL - 205
SP - 761
EP - 768
JO - Applied Energy
JF - Applied Energy
SN - 0306-2619
ER -