Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection

Jaehyeok Heo; Min Woo Jeong; Changhyun Baek; Yongchan Kim

doi:10.1016/j.ijrefrig.2010.10.003

Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection

Jaehyeok Heo, Min Woo Jeong, Changhyun Baek, Yongchan Kim

School of Mechanical Engineering

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

115 Citations (Scopus)

Abstract

The performance degradation of air-source heat pumps cannot be avoided when they operate at both very low and high ambient temperatures. The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures. This study measured the heating performance of air-source heat pumps in which novel vapor injection techniques of a combined flash tank and sub-cooler (FTSC) cycle and a double expansion sub-cooler (DESC) cycle were applied. The performance of these cycles was compared with that of a flash tank (FT) and a sub-cooler (SC) cycle. The average heating capacities of the FT, FTSC, and DESC cycles were higher by 14.4%, 6.0%, and 3.8%, respectively, relative to that of the SC cycle, but the average COPs for the respective cycle options were very similar.

Original language	English
Pages (from-to)	444-453
Number of pages	10
Journal	International Journal of Refrigeration
Volume	34
Issue number	2
DOIs	https://doi.org/10.1016/j.ijrefrig.2010.10.003
Publication status	Published - 2011 Mar

Bibliographical note

Funding Information:
This research was sponsored by the Korea Institute of Energy and Resources Technology Evaluation and Planning (Grant No. 2008NBLHME0900002008 ).

Keywords

Heat pump
Performance-heating
System injection
Two-stage

ASJC Scopus subject areas

Building and Construction
Mechanical Engineering

Access to Document

10.1016/j.ijrefrig.2010.10.003

Cite this

@article{8c70a9b5d731429992097bc9000a8597,

title = "Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection",

abstract = "The performance degradation of air-source heat pumps cannot be avoided when they operate at both very low and high ambient temperatures. The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures. This study measured the heating performance of air-source heat pumps in which novel vapor injection techniques of a combined flash tank and sub-cooler (FTSC) cycle and a double expansion sub-cooler (DESC) cycle were applied. The performance of these cycles was compared with that of a flash tank (FT) and a sub-cooler (SC) cycle. The average heating capacities of the FT, FTSC, and DESC cycles were higher by 14.4%, 6.0%, and 3.8%, respectively, relative to that of the SC cycle, but the average COPs for the respective cycle options were very similar.",

keywords = "Heat pump, Performance-heating, System injection, Two-stage",

author = "Jaehyeok Heo and Jeong, {Min Woo} and Changhyun Baek and Yongchan Kim",

note = "Funding Information: This research was sponsored by the Korea Institute of Energy and Resources Technology Evaluation and Planning (Grant No. 2008NBLHME0900002008 ). ",

year = "2011",

month = mar,

doi = "10.1016/j.ijrefrig.2010.10.003",

language = "English",

volume = "34",

pages = "444--453",

journal = "International Journal of Refrigeration",

issn = "0140-7007",

publisher = "Elsevier Limited",

number = "2",

}

TY - JOUR

T1 - Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection

AU - Heo, Jaehyeok

AU - Jeong, Min Woo

AU - Baek, Changhyun

AU - Kim, Yongchan

N1 - Funding Information: This research was sponsored by the Korea Institute of Energy and Resources Technology Evaluation and Planning (Grant No. 2008NBLHME0900002008 ).

PY - 2011/3

Y1 - 2011/3

N2 - The performance degradation of air-source heat pumps cannot be avoided when they operate at both very low and high ambient temperatures. The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures. This study measured the heating performance of air-source heat pumps in which novel vapor injection techniques of a combined flash tank and sub-cooler (FTSC) cycle and a double expansion sub-cooler (DESC) cycle were applied. The performance of these cycles was compared with that of a flash tank (FT) and a sub-cooler (SC) cycle. The average heating capacities of the FT, FTSC, and DESC cycles were higher by 14.4%, 6.0%, and 3.8%, respectively, relative to that of the SC cycle, but the average COPs for the respective cycle options were very similar.

AB - The performance degradation of air-source heat pumps cannot be avoided when they operate at both very low and high ambient temperatures. The refrigerant injection technique has rapidly developed in recent years due to its outstanding performance at low ambient temperatures. This study measured the heating performance of air-source heat pumps in which novel vapor injection techniques of a combined flash tank and sub-cooler (FTSC) cycle and a double expansion sub-cooler (DESC) cycle were applied. The performance of these cycles was compared with that of a flash tank (FT) and a sub-cooler (SC) cycle. The average heating capacities of the FT, FTSC, and DESC cycles were higher by 14.4%, 6.0%, and 3.8%, respectively, relative to that of the SC cycle, but the average COPs for the respective cycle options were very similar.

KW - Heat pump

KW - Performance-heating

KW - System injection

KW - Two-stage

UR - http://www.scopus.com/inward/record.url?scp=79751538922&partnerID=8YFLogxK

U2 - 10.1016/j.ijrefrig.2010.10.003

DO - 10.1016/j.ijrefrig.2010.10.003

M3 - Article

AN - SCOPUS:79751538922

SN - 0140-7007

VL - 34

SP - 444

EP - 453

JO - International Journal of Refrigeration

JF - International Journal of Refrigeration

IS - 2

ER -

Comparison of the heating performance of air-source heat pumps using various types of refrigerant injection

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this