Performance Analysis of Two-stage Compression CO2 Transcritical Cycle with R290 Mechanical Subcooling Unit

被引：0
作者：
Lu, Fenping [1 ]
Liu, Shengchun [1 ]
Dai, Baomin [1 ]
Li, Jiayu [1 ]
机构：
[1] Tianjin Univ Commerce, Tianjin Key Lab Refrigerat Technol, Sch Mech Engn, Tianjin 300134, Peoples R China
来源：
JOINT INTERNATIONAL CONFERENCE ON ENERGY, ECOLOGY AND ENVIRONMENT ICEEE 2018 AND ELECTRIC AND INTELLIGENT VEHICLES ICEIV 2018 | 2018年
基金：
中国国家自然科学基金;
关键词：
CO2; refrigeration; transcritical system; mechanical subcooling; two-stage compression; REFRIGERATION CYCLES; SYSTEM;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
The performances of two-stage compression CO2 transcritical cycle with R290 mechanical subcooling unit are analyzed. The overall COP variation with the compressor discharge pressure and the subcooling degree are discussed in detail. With the increase in subcooling degree and compressor discharge pressure, the COPs of the SMS, OTLMS, OTHMS, TTLMS, and TTHMS system increase first and then decrease. Under the working condition of optimal discharge pressure and optimal subcooling degree, TTHMS shows obvious advantage in COP over the system with no subcooling under the same working condition. When the evaporation temperature is-30 C, COP of TTHMS is improved by 22.35%. When the ambient temperature is 40 degrees C, COP of TTHMS is 1.51 higher than that without mechanical subcooling. The COP of SMS system reaches up to 4.26, which is 22.19% higher than that of OTHMS at the evaporation temperature of 10 C. At an ambient temperature of 35 degrees C, the COP of TTHMS is 2.15, which is 64.82% higher than that of OTHMS. The power consumption ratio of SMS is significantly higher than those of other systems and the highest power consumption ratio is 29.98%.
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页数：6
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