PERFORMANCE ANALYSIS OF COMBINED COOLING AND HEATING CO2 SYSTEM WITH MECHANICAL SUBCOOLING SYSTEM USING ZEOTROPIC MIXTURE AS WORKING FLUID

被引：0

作者：

Dai, Baomin ^{[1
]}

Wang, Qilong ^{[1
]}

Liu, Shengchun ^{[1
]}

Wang, Minghui ^{[1
]}

Zhang, Jianing ^{[1
]}

Li, Fangcan ^{[1
]}

Zhou, Xuan ^{[1
]}

Guo, Qiang ^{[2
]}

机构：

[1] Tianjin Univ Commerce, Tianjin Key Lab Refrigerat Technol, Tianjin 300134, Peoples R China

[2] Hisense Grp Holdings Co Ltd, Qingdao 266100, Peoples R China

来源：

3RD IIR CONFERENCE ON HFO REFRIGERANTS AND LOW GWP BLENDS | 2023年

基金：

中国国家自然科学基金;

关键词：

Mechanical Subcooling; CO2; Transcritical; Zeotropic Refrigerant; Combined Cooling and Heating Supply; Sterilization; REFRIGERATION CYCLES; COMBINED R134A; PRESSURE; PUMP;

D O I：

10.18462/iir.HFO2023.0010

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

To meet the simultaneous demand of freezing and high-temperature sterilization in the filed of food processing, a combined heating and refrigeration transcritical CO2 system integrated with mechanical subcooling using zeotropic mixture is proposed in this study. Low global warming potential (GWP) working fluids are selected as the component of the mixture. A thermodynamic model is developed, and then further optimized considering the influence of discharge pressure, subcooling degree, component and mass fraction. The results show the maximum COP is 3.30 when R1270/R601 at the mass fraction of 60%/40% is adopted, which is 27.0% higher than that of the baseline CO2 system. The corresponding discharge pressure is 12.45 MPa, and the subcooling degree is 39.93 degrees C. The proposed system can provide a promising solution for the scenario of simultaneous requirement of heating and freezing.

引用

页码：76 / 81

页数：6