Combined Effect of Using Sub-cooling Regenerator and Porous Evaporator on the Performance of Refrigeration System
Mohammad Tarawneh

Mohammad Tarawneh, Associate Professor, Mechanical engineering department, Hashemite University/ Engineering college/ Zarqa/Jordan, P.O. Box 330127, Zarqa 13133, Jordan.
Manuscript received on 02 June 2019 | Revised Manuscript received on 10 June 2019 | Manuscript published on 30 June 2019 | PP: 1262-1268 | Volume-8 Issue-8, June 2019 | Retrieval Number: H7011068819/19©BEIESP
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Abstract: In this experimental comparative study, the combined effect of using sub-cooling regenerator and porous evaporator on the performance of a refrigeration system using R422A and R22 as refrigerants is investigated. The variations of different performance parameters with degree of sub-cooling, porosity of evaporator and effectiveness of regenerator were studied. The two refrigerants under study exhibited similar behavior during the saturation processes. The compressor discharge temperature of R422A was found to be lower than that of R22 when using sub-cooler regenerator and porous evaporator with an average decrease of about 7%. The COP of R422A is greater than that of R22when using empty and porous evaporators and it reached larger values at larger degrees of sub-cooling and lower porosity with increase percentages of about 16% and 10% respectively. The average increase in the refrigeration capacities of R422A and R22 at average regenerator effectiveness when using porous evaporator instead of empty evaporator are 27% and 10%, respectively. R422A has lower power consumption per ton of refrigeration than that of R22 when using porous by about 13% and this percentage reached 9% when using empty evaporators. The pressure drop of R22and R422A is increased with increasing degree of sub-cooling with an average percent decrease of about 29.6%when using R422A instead of R22.
Keyword: Alternative Refrigerants, Liquid Suction Sub-cooler, Porous Evaporator, Regenerator, R22, R422A, Sub-cooling.
Scope of the Article: System Integration.