Abstract
The objective of this study is to investigate the performance characteristics of an injection CO2 (carbon dioxide) HPWH (heat pump water heater) at various operating conditions. In the standard and standby heat loss test conditions, the performance of a two-stage CO2 HPWH adopting a SCVI (sub-cooler vapor injection HPWH) cycle was measured and analyzed by varying the compressor frequency, the water flow rate, and the injection ratio at various outdoor temperatures. In the standard tests at the outdoor temperature of-15°C, the COP (coefficient of performance) of the optimized SCVI HPWH was 7.6% higher than that of the non-injection HPWH. During the standby loss tests at the water flow rate of 200kgh-1, the COP of the optimized SCVI HPWH was 7.1% higher than that of the non-injection HPWH.
| Original language | English |
|---|---|
| Pages (from-to) | 570-578 |
| Number of pages | 9 |
| Journal | Energy |
| Volume | 77 |
| DOIs | |
| Publication status | Published - 2014 Jan 1 |
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ASJC Scopus subject areas
- Energy(all)
- Pollution
Cite this
Performance characteristics of a two-stage CO2 heat pump water heater adopting a sub-cooler vapor injection cycle at various operating conditions. / Baek, Changhyun; Heo, Jaehyeok; Jung, Jongho; Cho, Honghyun; Kim, Yong Chan.
In: Energy, Vol. 77, 01.01.2014, p. 570-578.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Performance characteristics of a two-stage CO2 heat pump water heater adopting a sub-cooler vapor injection cycle at various operating conditions
AU - Baek, Changhyun
AU - Heo, Jaehyeok
AU - Jung, Jongho
AU - Cho, Honghyun
AU - Kim, Yong Chan
PY - 2014/1/1
Y1 - 2014/1/1
N2 - The objective of this study is to investigate the performance characteristics of an injection CO2 (carbon dioxide) HPWH (heat pump water heater) at various operating conditions. In the standard and standby heat loss test conditions, the performance of a two-stage CO2 HPWH adopting a SCVI (sub-cooler vapor injection HPWH) cycle was measured and analyzed by varying the compressor frequency, the water flow rate, and the injection ratio at various outdoor temperatures. In the standard tests at the outdoor temperature of-15°C, the COP (coefficient of performance) of the optimized SCVI HPWH was 7.6% higher than that of the non-injection HPWH. During the standby loss tests at the water flow rate of 200kgh-1, the COP of the optimized SCVI HPWH was 7.1% higher than that of the non-injection HPWH.
AB - The objective of this study is to investigate the performance characteristics of an injection CO2 (carbon dioxide) HPWH (heat pump water heater) at various operating conditions. In the standard and standby heat loss test conditions, the performance of a two-stage CO2 HPWH adopting a SCVI (sub-cooler vapor injection HPWH) cycle was measured and analyzed by varying the compressor frequency, the water flow rate, and the injection ratio at various outdoor temperatures. In the standard tests at the outdoor temperature of-15°C, the COP (coefficient of performance) of the optimized SCVI HPWH was 7.6% higher than that of the non-injection HPWH. During the standby loss tests at the water flow rate of 200kgh-1, the COP of the optimized SCVI HPWH was 7.1% higher than that of the non-injection HPWH.
KW - CO heat pump water heater
KW - Hot water temperature
KW - Injection ratio
KW - Vapor injection
KW - Water heating performance
UR - http://www.scopus.com/inward/record.url?scp=84909986656&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84909986656&partnerID=8YFLogxK
U2 - 10.1016/j.energy.2014.09.038
DO - 10.1016/j.energy.2014.09.038
M3 - Article
AN - SCOPUS:84909986656
VL - 77
SP - 570
EP - 578
JO - Energy
JF - Energy
SN - 0360-5442
ER -