Exergy Analysis of the Vapor Compression Refrigeration

2012 ◽  
Vol 170-173 ◽  
pp. 2468-2473
Author(s):  
Xiao Fen Ren ◽  
Jian Qiang Wang ◽  
Xiu Yun Li ◽  
Lian Dong Jia
Keyword(s):  
Temperature Regulation ◽  
Exergy Analysis ◽  
Exergy Loss ◽  
Vapor Compression ◽  
Vapor Compression Refrigeration ◽  
The Way

The paper builds up the model for exergy analysis of vapor compression refrigeration. According to the exergy analysis, it appears exergy loss degree of the main units in the system, and points out the way of reducing exergy loss and the approach utilizing energy rationally, and proceeds with exergy loss compare with aiming at that if condenser in surplus heat recycling. Conclusion is that adopting surplus heat recycling can reduce exergy loss. Furthermore, it analyzes exergy loss to a actual refrigeration aiming at temperature regulation, and provides the theory reference for improvement and optimization of the system.

scholarly journals Energy and Exergy Analysis of Combined Organic Rankine Cycle-Single and Dual Evaporator Vapor Compression Refrigeration Cycle

2019 ◽  
Vol 9 (23) ◽  
pp. 5028 ◽  
Author(s):  
Pektezel ◽  
Acar
Keyword(s):  
Exergy Analysis ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Working Fluid ◽  
Refrigeration Cycle ◽  
Vapor Compression ◽  
Exergy Destruction ◽  
Energy And Exergy ◽  
Energy And Exergy Analysis ◽  
Vapor Compression Refrigeration

This paper presents energy and exergy analysis of two vapor compression refrigeration cycles powered by organic Rankine cycle. Refrigeration cycle of combined system was designed with single and dual evaporators. R134a, R1234ze(E), R227ea, and R600a fluids were used as working fluids in combined systems. Influences of different parameters such as evaporator, condenser, boiler temperatures, and turbine and compressor isentropic efficiencies on COPsys and ƞex,sys were analyzed. Second law efficiency, degree of thermodynamic perfection, exergy destruction rate, and exergy destruction ratio were detected for each component in systems. R600a was determined as the most efficient working fluid for proposed systems. Both COPsys and ƞex,sys of combined ORC-single evaporator VCR cycle was detected to be higher than the system with dual evaporator.

Exergy analysis of vapor compression refrigeration systems

2002 ◽  
Vol 2 (4) ◽  
pp. 266-272 ◽  
Author(s):  
Recep Yumrutaş ◽  
Mehmet Kunduz ◽  
Mehmet Kanoğlu
Keyword(s):  
Exergy Analysis ◽  
Vapor Compression ◽  
Vapor Compression Refrigeration

Experimental evidence concerning the different behavior of energy and exergy performance indicators of refrigeration systems in transient regimes

2016 ◽  
Vol 41 (1) ◽  
Author(s):  
Elena Eugenia Vasilescu ◽  
Michel Feidt ◽  
Rahal Boussehain ◽  
Alexandru Dobrovicescu
Keyword(s):  
Exergy Analysis ◽  
Initial Temperature ◽  
Stationary Regime ◽  
Coefficient Of Performance ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Transient Regimes ◽  
Energy And Exergy ◽  
Vapor Compression Refrigeration ◽  
Exergy Performance

AbstractThis article presents the results obtained from an energy-exergy analysis of a vapor compression refrigeration system during induced transient regimes. Using experimental data, exergy destruction as a function of time under the influence of some factors that perturb the stationary regime, such as deactivation of piston, variation of mass flow rate and initial temperature of cooled fluid, and diminution of the compressor rotation speed, was calculated. Under the perturbation, an antagonistic increase in the coefficient of performance and a decrease in exergy efficiency were noted.

scholarly journals Exergy analysis of vapor compression refrigeration system using R450A as a replacement of R134a

2018 ◽  
Vol 136 (2) ◽  
pp. 857-872 ◽  
Author(s):  
Jatinder Gill ◽  
Jagdev Singh ◽  
Olayinka S. Ohunakin ◽  
Damola S. Adelekan
Keyword(s):  
Exergy Analysis ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Vapor Compression Refrigeration

Extended Exergy Analysis Based Comparison of Subcritical and Transcritical Refrigeration Systems

2016 ◽  
Vol 24 (02) ◽  
pp. 1650009 ◽  
Author(s):  
Jahar Sarkar ◽  
Dnyanesh Joshi
Keyword(s):  
Exergy Analysis ◽  
Vapor Compression ◽  
Exergy Destruction ◽  
Refrigeration System ◽  
Vapor Compression Refrigeration ◽  
System Improvement

The main purpose of this study is to apply advanced exergy analysis to the transcritical CO2 vapor compression refrigeration system, and compare with the analysis of subcritical cycle using ammonia and R404a. Endogenous, exogenous, avoidable and unavoidable exergy destructions are determined for each component of these systems. For CO2 system, compressor contributes highest avoidable endogenous exergy destruction and gas cooler contributes highest avoidable exogenous exergy destruction. It is concluded that compressor is the first component for CO2 and R404a, and evaporator is the first component for NH3 to be improved. System improvement options to reduce the exergy destruction are discussed as well.

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