TY - JOUR
T1 - Simulation-based comparative seasonal performance evaluation of single-stage heat pump and modulated two-stage injection heat pump using rotary compressors with various cylinder volume ratios
AU - Lee, Sang Hun
AU - Jeon, Yongseok
AU - Kim, Byeongsu
AU - Yun, Sungho
AU - Kim, Yongchan
N1 - Funding Information:
This work was supported by the Energy Technology Development Program (No. 20172020108580 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea.
PY - 2019/8
Y1 - 2019/8
N2 - In this study, the comparative seasonal performance evaluations of single-stage heat pump, two-stage injection heat pump, and modulated two-stage injection heat pump using rotary compressors are conducted using a heat pump simulation model. The heat pump simulation and optimization models are developed and validated. The operating parameters are optimized by genetic algorithm to achieve the maximum energy efficiency ratio (EER) and coefficient of performance (COP) at a given outdoor temperature. Moreover, the optimal lower compressor volume and cylinder volume ratio are determined to maximize the seasonal EER (SEER) and seasonal COP (SCOP) at the given weather conditions. The EER and COP of the two-stage injection heat pump are improved substantially at high cooling and heating load conditions, respectively. However, since the two-stage injection heat pump is not effective to improve the SEER owing to the lower performance at the low cooling load conditions, the modulated two-stage injection heat pump is introduced. Consequently, the SEER and SCOP of the modulated two-stage injection heat pump are 6.0% and 1.4%, respectively, higher than those of the single-stage heat pump at the cooling and average heating conditions.
AB - In this study, the comparative seasonal performance evaluations of single-stage heat pump, two-stage injection heat pump, and modulated two-stage injection heat pump using rotary compressors are conducted using a heat pump simulation model. The heat pump simulation and optimization models are developed and validated. The operating parameters are optimized by genetic algorithm to achieve the maximum energy efficiency ratio (EER) and coefficient of performance (COP) at a given outdoor temperature. Moreover, the optimal lower compressor volume and cylinder volume ratio are determined to maximize the seasonal EER (SEER) and seasonal COP (SCOP) at the given weather conditions. The EER and COP of the two-stage injection heat pump are improved substantially at high cooling and heating load conditions, respectively. However, since the two-stage injection heat pump is not effective to improve the SEER owing to the lower performance at the low cooling load conditions, the modulated two-stage injection heat pump is introduced. Consequently, the SEER and SCOP of the modulated two-stage injection heat pump are 6.0% and 1.4%, respectively, higher than those of the single-stage heat pump at the cooling and average heating conditions.
KW - Heat pump
KW - SCOP
KW - SEER
KW - Two-stage compression
KW - Vapor injection
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U2 - 10.1016/j.applthermaleng.2019.113892
DO - 10.1016/j.applthermaleng.2019.113892
M3 - Article
AN - SCOPUS:85066933365
VL - 159
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
SN - 1359-4311
M1 - 113892
ER -