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Performance Enhancement of R-134a Refrigeration Cycle by Using Solar Peltier Subcooler

M. Ravikiran, K. Dilip Kumar


World tendency is to look at renewable energy sources as a source of energy due to energy short coming. Environmental pollution is also a major problem in the field of refrigeration and air conditioning with the cause of global warming and ozone depletion. R-134a as a refrigerant has better environmental benefits in comparison with conventional refrigerants. A noval integration of R-134a refrigeration cycle with placing of Peltier modules after condenser which works on the principle of Peltier effect is used to subcool the refrigerant before expansion valve and solar panel produces power from solar radiation which is considerable amount of required power input to the Peltier cooler. Some important parameters of the proposed system are investigated. A comparison is carried out between the proposed system with simple R134a refrigeration system indicating that the proposed configuration improves the coefficient of performance about 35.74% and also observed that the new configuration performance increases gradually by increase in power input to the subcooler for subcooling the refrigerant.

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K. Yazawa, S. Dharkar, O. Kurtulus, E.A. Groll. Optimum design for thermoelectric in a sub-cooled trans-critical CO2 heat pump for data center cooling, The 31st Thermal Measurement, Modeling & Management Symposium (SEMI-THERM). San Jose, USA, 2015.

J. Sarkar. Performance optimization of trans critical CO2 refrigeration cycle with thermoelectric sub cooler, Int J Energy Res. 2013; 37(2): 121–8p.

Y. Ma, Z. Liu, H. Tian. A review of transcritical carbon dioxide heat pump and refrigeration cycles, Energy. 2013; 55: 156–72p.

R. Llopis, et al. Energy improvements of CO2 transcritical refrigeration cycles using dedicated mechanical sub cooling, Int J Refrig. 2015; 55: 129–41p.

J. Schoenfield, Y. Hwang, R. Radermacher. CO2 transcritical vapor compression cycle with thermoelectric sub cooler, HVAC&R Res. 2012; 18(3): 297–311p.

AdvanceThermoelectric.OneTaraBoulevard.Nashu, NH-03062.Us.

X.F. Zheng, et al. A review of thermo-electrics research–Recent developments and potentials for sustainable and renewable energy applications, Renew Sustain Energy Rev. 2014; 32: 486–503p.

C. Wu. Analysis of waste-heat thermoelectric power generators, Appl Therm Eng. 1996; 16: 63–9p.

L. Bell. Cooling, heating, generating power, and recovering waste heat with thermoelectric systems, Science. 2008; 321: 1457–61p. doi:10.1126/ science.1158899.

D. Zhao, G. Tan. A review of thermoelectric cooling: materials, modeling and applications, Appl Therm Eng. 2014; 66: 15–24p. doi:10.1016/j.applthermaleng.2014.01.074.


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