Performance comparison among two-phase, liquid, and vapor injection heat pumps with a scroll compressor using R410A

Dongwoo Kim; Yongseok Jeon; Dong Soo Jang; Yongchan Kim

doi:10.1016/j.applthermaleng.2018.03.086

Performance comparison among two-phase, liquid, and vapor injection heat pumps with a scroll compressor using R410A

Dongwoo Kim
, Yongseok Jeon
, Dong Soo Jang
, Yongchan Kim^*

^*Corresponding author for this work

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

86 Citations (Scopus)

Abstract

Although two-phase injection technique is expected to improve the performance and reliability of heat pumps in cold climate conditions, its application is limited due to wet-compression. In this study, a numerical model was developed and validated to predict the performance of liquid, vapor, and two-phase injection heat pumps. The performance characteristics of the liquid, vapor, and two-phase injection heat pumps with a scroll compressor using R410A were compared with the others, based on the predicted data. The optimum injection quality in the two-phase injection heat pump to achieve maximum COP was analyzed as a function of the injection pressure, compressor frequency, and outdoor temperature. The two-phase injection heat pump with the optimum injection quality exhibited the highest COP among all injection types with a proper discharge temperature. In addition, the two-phase injection heat pump with the optimum injection quality was more effective in COP improvement with decreasing outdoor temperature.

Original language	English
Pages (from-to)	193-202
Number of pages	10
Journal	Applied Thermal Engineering
Volume	137
DOIs	https://doi.org/10.1016/j.applthermaleng.2018.03.086
Publication status	Published - 2018 Jun 5

Bibliographical note

Funding Information:
This work was supported by the Industrial Core Technology Development Program (No. 10049090 ) of the Korea Evaluation Institute of Industrial Technology (KEIT) – Republic of Korea funded by the Korea Government Ministry of Trade, Industry and Energy, Republic of Korea.

Publisher Copyright:
© 2018 Elsevier Ltd

Keywords

Heat pump
Liquid injection
Scroll compressor
Two-phase injection
Vapor injection

ASJC Scopus subject areas

Energy Engineering and Power Technology
Industrial and Manufacturing Engineering

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10.1016/j.applthermaleng.2018.03.086

Cite this

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title = "Performance comparison among two-phase, liquid, and vapor injection heat pumps with a scroll compressor using R410A",

abstract = "Although two-phase injection technique is expected to improve the performance and reliability of heat pumps in cold climate conditions, its application is limited due to wet-compression. In this study, a numerical model was developed and validated to predict the performance of liquid, vapor, and two-phase injection heat pumps. The performance characteristics of the liquid, vapor, and two-phase injection heat pumps with a scroll compressor using R410A were compared with the others, based on the predicted data. The optimum injection quality in the two-phase injection heat pump to achieve maximum COP was analyzed as a function of the injection pressure, compressor frequency, and outdoor temperature. The two-phase injection heat pump with the optimum injection quality exhibited the highest COP among all injection types with a proper discharge temperature. In addition, the two-phase injection heat pump with the optimum injection quality was more effective in COP improvement with decreasing outdoor temperature.",

keywords = "Heat pump, Liquid injection, Scroll compressor, Two-phase injection, Vapor injection",

author = "Dongwoo Kim and Yongseok Jeon and Jang, \{Dong Soo\} and Yongchan Kim",

note = "Funding Information: This work was supported by the Industrial Core Technology Development Program (No. 10049090 ) of the Korea Evaluation Institute of Industrial Technology (KEIT) – Republic of Korea funded by the Korea Government Ministry of Trade, Industry and Energy, Republic of Korea. Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

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doi = "10.1016/j.applthermaleng.2018.03.086",

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AU - Jeon, Yongseok

AU - Jang, Dong Soo

AU - Kim, Yongchan

N1 - Funding Information: This work was supported by the Industrial Core Technology Development Program (No. 10049090 ) of the Korea Evaluation Institute of Industrial Technology (KEIT) – Republic of Korea funded by the Korea Government Ministry of Trade, Industry and Energy, Republic of Korea. Publisher Copyright: © 2018 Elsevier Ltd

PY - 2018/6/5

Y1 - 2018/6/5

N2 - Although two-phase injection technique is expected to improve the performance and reliability of heat pumps in cold climate conditions, its application is limited due to wet-compression. In this study, a numerical model was developed and validated to predict the performance of liquid, vapor, and two-phase injection heat pumps. The performance characteristics of the liquid, vapor, and two-phase injection heat pumps with a scroll compressor using R410A were compared with the others, based on the predicted data. The optimum injection quality in the two-phase injection heat pump to achieve maximum COP was analyzed as a function of the injection pressure, compressor frequency, and outdoor temperature. The two-phase injection heat pump with the optimum injection quality exhibited the highest COP among all injection types with a proper discharge temperature. In addition, the two-phase injection heat pump with the optimum injection quality was more effective in COP improvement with decreasing outdoor temperature.

AB - Although two-phase injection technique is expected to improve the performance and reliability of heat pumps in cold climate conditions, its application is limited due to wet-compression. In this study, a numerical model was developed and validated to predict the performance of liquid, vapor, and two-phase injection heat pumps. The performance characteristics of the liquid, vapor, and two-phase injection heat pumps with a scroll compressor using R410A were compared with the others, based on the predicted data. The optimum injection quality in the two-phase injection heat pump to achieve maximum COP was analyzed as a function of the injection pressure, compressor frequency, and outdoor temperature. The two-phase injection heat pump with the optimum injection quality exhibited the highest COP among all injection types with a proper discharge temperature. In addition, the two-phase injection heat pump with the optimum injection quality was more effective in COP improvement with decreasing outdoor temperature.

KW - Heat pump

KW - Liquid injection

KW - Scroll compressor

KW - Two-phase injection

KW - Vapor injection

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VL - 137

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JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

ER -

Performance comparison among two-phase, liquid, and vapor injection heat pumps with a scroll compressor using R410A

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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