TY - JOUR
T1 - Experimental and theoretical study on a novel double evaporating temperature chiller applied in THICS using R32/R236fa
AU - Liu, Jian
AU - She, Xiaohui
AU - Zhang, Xiaosong
AU - Cong, Lin
AU - Man, Liang
AU - Lindeman, Brett
AU - Lin, Tao
PY - 2016/8/31
Y1 - 2016/8/31
N2 - A novel chiller with double evaporating temperatures is proposed in this paper, which can be applied in temperature and humidity independent control system (THICS). A zeotropic mixture R32/R236fa is selected as the refrigerant, and chilled water with two different temperatures is produced. The experimental coefficient of performance (COPexp), theoretical coefficient of performance (COPth), and second law efficiency (η) of the chiller are studied. The performance of the chiller is studied by varying the mass fraction of R32 in the R32/R236fa (W(R32)), chilled water temperature, and the flow rates of the heat transfer media (chilled water and cooling water). The results show that the high temperature chilled water (TH,out) can be at 15-18 °C, and the low temperature chilled water (TL,out) can be at 6-8 °C. When TH,out is 17 °C and TL,out is 7 °C, the maximum COPth and COPexp are 4.73 and 3.97, respectively. Second law efficiency, η, increases to 31% as W(R32) increases from 0.3 to 0.6.
AB - A novel chiller with double evaporating temperatures is proposed in this paper, which can be applied in temperature and humidity independent control system (THICS). A zeotropic mixture R32/R236fa is selected as the refrigerant, and chilled water with two different temperatures is produced. The experimental coefficient of performance (COPexp), theoretical coefficient of performance (COPth), and second law efficiency (η) of the chiller are studied. The performance of the chiller is studied by varying the mass fraction of R32 in the R32/R236fa (W(R32)), chilled water temperature, and the flow rates of the heat transfer media (chilled water and cooling water). The results show that the high temperature chilled water (TH,out) can be at 15-18 °C, and the low temperature chilled water (TL,out) can be at 6-8 °C. When TH,out is 17 °C and TL,out is 7 °C, the maximum COPth and COPexp are 4.73 and 3.97, respectively. Second law efficiency, η, increases to 31% as W(R32) increases from 0.3 to 0.6.
KW - double evaporating temperature
KW - chiller
KW - COP
KW - second law efficiency
KW - zeotropic refrigerant
U2 - 10.1016/j.ijrefrig.2016.08.015
DO - 10.1016/j.ijrefrig.2016.08.015
M3 - Article
SN - 0140-7007
JO - International Journal of Refrigeration
JF - International Journal of Refrigeration
ER -