Performance optimization of an R410A air-conditioner with a dual evaporator ejector cycle based on cooling seasonal performance factor

Sunjae Kim; Yongseok Jeon; Hyun Joon Chung; Yongchan Kim

doi:10.1016/j.applthermaleng.2017.12.012

Performance optimization of an R410A air-conditioner with a dual evaporator ejector cycle based on cooling seasonal performance factor

Sunjae Kim, Yongseok Jeon, Hyun Joon Chung, Yongchan Kim

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

27 Citations (Scopus)

Abstract

Even though a dual evaporator ejector cycle (DEEC) offers several advantages over a standard two-phase ejector cycle, few experimental investigations of the performance of the DEEC are available in the literature. This study presents the performance characteristics of an R410A air-conditioner adopted with a DEEC under various operating conditions and ejector geometries. The COP of the DEEC decreased with an increase in entrainment ratio (ER) due to the decrease in pressure lifting ratio. For the optimum ER, the effectiveness of the DEEC increased with an increase in compressor speed with a larger total mass flow rate. The optimum mixing section diameter was determined to be 5 mm based on the cooling seasonal performance factor (CSPF) and CSPF_bin of the DEEC. The maximum allowable limit for the ER was also suggested to be 0.3. In addition, the CSPF of the DEEC was 6.3% higher than that of the baseline cycle at an ER of 0.1.

Original language	English
Pages (from-to)	988-997
Number of pages	10
Journal	Applied Thermal Engineering
Volume	131
DOIs	https://doi.org/10.1016/j.applthermaleng.2017.12.012
Publication status	Published - 2018 Feb 25

Bibliographical note

Funding Information:
This work was supported by the Human Resources Program in Energy Technology (No. 20144010200770 ) and the Energy Technology Development Program (No. 20142010102660 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea.

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

COP
CSPF
Dual evaporator ejector cycle
Ejector

ASJC Scopus subject areas

Energy Engineering and Power Technology
Industrial and Manufacturing Engineering

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10.1016/j.applthermaleng.2017.12.012

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abstract = "Even though a dual evaporator ejector cycle (DEEC) offers several advantages over a standard two-phase ejector cycle, few experimental investigations of the performance of the DEEC are available in the literature. This study presents the performance characteristics of an R410A air-conditioner adopted with a DEEC under various operating conditions and ejector geometries. The COP of the DEEC decreased with an increase in entrainment ratio (ER) due to the decrease in pressure lifting ratio. For the optimum ER, the effectiveness of the DEEC increased with an increase in compressor speed with a larger total mass flow rate. The optimum mixing section diameter was determined to be 5 mm based on the cooling seasonal performance factor (CSPF) and CSPFbin of the DEEC. The maximum allowable limit for the ER was also suggested to be 0.3. In addition, the CSPF of the DEEC was 6.3% higher than that of the baseline cycle at an ER of 0.1.",

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AU - Kim, Yongchan

N1 - Funding Information: This work was supported by the Human Resources Program in Energy Technology (No. 20144010200770 ) and the Energy Technology Development Program (No. 20142010102660 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea. Publisher Copyright: © 2017 Elsevier Ltd

PY - 2018/2/25

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N2 - Even though a dual evaporator ejector cycle (DEEC) offers several advantages over a standard two-phase ejector cycle, few experimental investigations of the performance of the DEEC are available in the literature. This study presents the performance characteristics of an R410A air-conditioner adopted with a DEEC under various operating conditions and ejector geometries. The COP of the DEEC decreased with an increase in entrainment ratio (ER) due to the decrease in pressure lifting ratio. For the optimum ER, the effectiveness of the DEEC increased with an increase in compressor speed with a larger total mass flow rate. The optimum mixing section diameter was determined to be 5 mm based on the cooling seasonal performance factor (CSPF) and CSPFbin of the DEEC. The maximum allowable limit for the ER was also suggested to be 0.3. In addition, the CSPF of the DEEC was 6.3% higher than that of the baseline cycle at an ER of 0.1.

AB - Even though a dual evaporator ejector cycle (DEEC) offers several advantages over a standard two-phase ejector cycle, few experimental investigations of the performance of the DEEC are available in the literature. This study presents the performance characteristics of an R410A air-conditioner adopted with a DEEC under various operating conditions and ejector geometries. The COP of the DEEC decreased with an increase in entrainment ratio (ER) due to the decrease in pressure lifting ratio. For the optimum ER, the effectiveness of the DEEC increased with an increase in compressor speed with a larger total mass flow rate. The optimum mixing section diameter was determined to be 5 mm based on the cooling seasonal performance factor (CSPF) and CSPFbin of the DEEC. The maximum allowable limit for the ER was also suggested to be 0.3. In addition, the CSPF of the DEEC was 6.3% higher than that of the baseline cycle at an ER of 0.1.

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Performance optimization of an R410A air-conditioner with a dual evaporator ejector cycle based on cooling seasonal performance factor

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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