Identification of optimum inter-stage pressure for two-stage transcritical carbon dioxide refrigeration cycles

2011 ◽  
Vol 58 (1) ◽  
pp. 26-30 ◽  
Author(s):  
K. Srinivasan
Keyword(s):  
Carbon Dioxide ◽  
Two Stage ◽  
Transcritical Carbon Dioxide

Two-stage transcritical carbon dioxide cycle optimisation: A theoretical and experimental analysis

2005 ◽  
Vol 28 (8) ◽  
pp. 1274-1283 ◽  
Author(s):  
Alberto Cavallini ◽  
Luca Cecchinato ◽  
Marco Corradi ◽  
Ezio Fornasieri ◽  
Claudio Zilio
Keyword(s):  
Carbon Dioxide ◽  
Experimental Analysis ◽  
Two Stage ◽  
Transcritical Carbon Dioxide

Optimization of two-stage transcritical carbon dioxide heat pump cycles

2007 ◽  
Vol 46 (2) ◽  
pp. 180-187 ◽  
Author(s):  
Neeraj Agrawal ◽  
Souvik Bhattacharyya ◽  
J. Sarkar
Keyword(s):  
Carbon Dioxide ◽  
Heat Pump ◽  
Two Stage ◽  
Transcritical Carbon Dioxide

Theoretical performance of transcritical carbon dioxide cycle with two-stage compression and intercooling

2005 ◽  
Vol 219 (2) ◽  
pp. 187-195 ◽  
Author(s):  
J. S. Baek ◽  
E. A. Groll ◽  
P. B. Lawless
Keyword(s):  
Carbon Dioxide ◽  
System Analysis ◽  
Coefficient Of Performance ◽  
System Efficiency ◽  
Compression Process ◽  
Two Stage ◽  
Bell Curve ◽  
Second Stage ◽  
Transcritical Carbon Dioxide ◽  
Theoretical Performance

A computer model was developed to perform a thermodynamic analysis of the transcritical carbon dioxide cycle with two-stage compression and intercooling. In typical two-stage compression with intercooling applications, the intercooler serves the purpose of cooling the fluid to the lowest possible temperature before it enters the second-stage compressor. This paper presents the results of the system analysis of the transcritical carbon dioxide cycle with two-stage compression and intercooling (intercooler cycle) and identifies the pressure ratios that provide maximum system efficiency. The results show that the coefficient of performance (COP), curves of the intercooler cycle are different from the ‘typical bell curve behaviours’ that are observed when plotting the COP versus the intermediate pressure with assumptions of isentropic and real compression process.

scholarly journals Numerical analysis of transcritical carbon dioxide compression cycle: a case study

2018 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Mohammad Mehdi Keshtkar
Keyword(s):  
Carbon Dioxide ◽  
Coefficient Of Performance ◽  
Outlet Temperature ◽  
Two Stage ◽  
Change Of Variables ◽  
Compression Cycle ◽  
Transcritical Carbon Dioxide ◽  
Two Stages ◽  
Isentropic Efficiency

This study deals with thermodynamic investigation of a refrigeration compression cycle with carbon dioxide refrigerant and two stage compression. In this paper, the effect of intercooler in the two-stage compression system at different pressures of gas cooler is investigated. In addition, the performance of one stage compression cycle and two-stage compression cycle are compared and eventually, the performance of system is investigated under the influence of the change of variables such as gas cooler  pressure, isentropic efficiency of the compressors, the intercooling rate between the two stages of compression, the refrigerant gas cooler outlet temperature is examined. Due to evaporation temperature in the evaporator  and refrigeration capacity (kW) results show that the coefficient of performance in the two-stage compression with intercooler is increased compared to the single-stage compression cycle.

Thermodynamic analysis of different two-stage transcritical carbon dioxide cycles

2009 ◽  
Vol 32 (5) ◽  
pp. 1058-1067 ◽  
Author(s):  
Luca Cecchinato ◽  
Manuel Chiarello ◽  
Marco Corradi ◽  
Ezio Fornasieri ◽  
Silvia Minetto ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Thermodynamic Analysis ◽  
Two Stage ◽  
Transcritical Carbon Dioxide
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