Performance analysis of the thermoelectric device as the internal heat exchanger of the trans-critical carbon dioxide cycle

2020 ◽  
Vol 208 ◽  
pp. 112585
Author(s):  
Trevor Hocksun Kwan ◽  
Yongting Shen ◽  
Zhen Wu ◽  
Qinghe Yao
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Performance Analysis ◽  
Internal Heat ◽  
Thermoelectric Device ◽  
Internal Heat Exchanger ◽  
Critical Carbon Dioxide

scholarly journals Performance Analysis of Two-stage Compression Refrigeration System with Internal Heat Exchanger Applied Various Refrigerants

2015 ◽  
Vol 19 (6) ◽  
pp. 82-88
Author(s):  
Jung-In Yoon ◽  
Seong-Kwan Heo ◽  
Jae-Myun Je ◽  
Min-Ju Jeon ◽  
Chang-Hyo Son ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Performance Analysis ◽  
Internal Heat ◽  
Refrigeration System ◽  
Two Stage ◽  
Internal Heat Exchanger

scholarly journals Effect of an Internal Heat Exchanger on Performance of the Transcritical Carbon Dioxide Refrigeration Cycle with an Expander

Entropy ◽  
2014 ◽  
Vol 16 (11) ◽  
pp. 5919-5934 ◽  
Author(s):  
Zhenying Zhang ◽  
Lili Tian ◽  
Yanhua Chen ◽  
Lirui Tong
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Internal Heat ◽  
Refrigeration Cycle ◽  
Internal Heat Exchanger ◽  
Transcritical Carbon Dioxide

Performance Analysis of Single Stage Compression Cycle with an Internal Heat Exchanger

2013 ◽  
Vol 753-755 ◽  
pp. 1401-1404
Author(s):  
Gui Jun Xue ◽  
Da Wei Liang ◽  
Guang Da Liu ◽  
Shui Qing Li ◽  
Zhen Jiang Zhou
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Performance Analysis ◽  
Internal Heat ◽  
Single Stage ◽  
Outlet Temperature ◽  
Outlet Pressure ◽  
Internal Heat Exchanger ◽  
Compression Cycle ◽  
Increasing Trend

With the increase of outlet pressure to compressor, all cycle COP is a reducing trend except R744, in addition, R744 compression cycle has an optimum high pressure. When the inlet temperatures of compressor gradually increase, the performances of all cycles basically unchanged, but the R744 compression cycle has an increasing trend. With the increasing of outlet temperature to the condenser, the performances of all cycles are decreased; instead with increasing of the evaporating temperature, all cycle COP is an increasing trend.

Performance Analysis of Single Stage Compression Cycle with an Internal Heat Exchanger

2012 ◽  
Vol 602-604 ◽  
pp. 1068-1071
Author(s):  
Hong Li Wang ◽  
Hui Qin Liu ◽  
Qi Long Tang ◽  
Ning Jia
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Performance Analysis ◽  
Internal Heat ◽  
Single Stage ◽  
Outlet Temperature ◽  
Internal Heat Exchanger ◽  
Compression Cycle ◽  
Increasing Trend

With increasing of high pressure, the performances of all kinds refrigerants except for R744 are all declined, transcritical R744 compression cycle has an optimum high pressure. With increasing of the evaporating temperature, all cycle COP is an increasing trend, with increasing of outlet temperature of condenser, the performances of all cycles are decreased. Under the same comparison conditions, the performance of R22 refrigerant cycle is superior to the cycles of other refrigerants, and the cycle of R11 refrigerant has the worst performance.

Transcritical Carbon Dioxide Refrigeration as an Alternative to Subcritical Plants

2016 ◽  
pp. 100-159
Author(s):  
Adriana Greco ◽  
Ciro Aprea ◽  
Angelo Maiorino
Keyword(s):  
Carbon Dioxide ◽  
Heat Exchanger ◽  
Critical Temperature ◽  
Experimental Analysis ◽  
Internal Heat ◽  
Refrigeration Cycle ◽  
Desiccant Wheel ◽  
Internal Heat Exchanger ◽  
Transcritical Carbon Dioxide ◽  
Vapour Compression

Carbon dioxide (R744) is as a valid alternative to classical substances such as HFCs used in vapour compression plants. A transcritical refrigeration cycle is needed because the critical temperature of carbon dioxide is usually lower than the ambient temperature. In this chapter the performances of a transcritical cycle have been evaluated with a prototype R744 system working as a classical spit-systems to cool air. An experimental analysis has been carried out on the effect of: refrigerant charge, internal heat exchanger, heat rejection pressure on the energetic performances of the transcritical plant. An experimental analysis of a hybrid trans-critical refrigerator-desiccant wheel system has been carried out in order to improve the COP. The experimental transcritical cycle has been examined in comparison with a classical vapour compression plant working with the R134a.

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