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ENERGY PERFORMANCE OF ENVIRONMENTAL-FRIENDLY R435A AND R161 REFRIGERANTS IN SUB-COOLING REFRIGERATION SYSTEMS

Olalekan Bukola, Michael Bolaji, Mabel Rotimi Adu¹, Emmanuel Usunobun Olanipekun², Akinnibosun³
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The synthetic chlorofluorocarbon (CFC) and hydro-chlorofluorocarbon (HCFC) refrigerants are being phased out due to their high Ozone depletion Potentials (ODPs) and Global Warming Potentials (GWPs). In this study, the effects of sub-cooling on the energy performance of two eco-friendly refrigerants (R435A and R161) with zero ODP and negligible GWP are investigated theoretically and compared with those obtained using R413A. The results obtained showed that the thermodynamic properties of R435A
more » ... tched those of R413A and it could be used as substitute for R413A. The two alternative refrigerants (R435A and R161) exhibited very high refrigerating effects and coefficient of performance (COP) with the average COPs of 9.17 and 7.68 % respectively higher than that of R413A. They also exhibited lower power per ton of refrigeration (PPTR), but R435A emerged as the most energy efficient refrigerant with the highest COP and lowest PPTR. Generally, incorporation of sub-cooling heat exchanger enhanced the system's performance. Energetska učinkovitost ekološko prihvatljivih R435A i R161 radnih tvari u pothlađenim rashladnim sustavima. Sintetske radne tvari, klorofluorougljik (CFC) i hidro-klorofluorugljik (HCFC), se postupno ukidaju zbog njihovog visokog potencijala na oštećenje ozonskog omotača (ODPs) i potencijala na globalno zagrijavanje (GWPs). U ovom radu teoretski su istraživani učinci pothlađivanja na energijsku učinkovitost dviju eko-prihvatljivih radnih tvari (R435A i R161) s nula ODP i zanemarivog GWP koji su uspoređeni s onima dobivenim upotrebom R413A. Dobiveni rezultati su pokazali da termodinamička svojstva R435A odgovaraju onima R413A i mogu se koristiti kao zamjena za R413A. Dvije alternativne radne tvari (R435A i R161) pokazuju vrlo visoki rashladni efekt i koeficijent učinkovitosti (COP) s prosječnim COP-om od 9,17% za R435A i 7,68% za R161 više od R413A. Oni također imaju nižu snagu po toni hlađenja (PPTR), ali R435A se pokazao kao energetski najučinkovitije sredstvo za hlađenje s najvišim COP-om i najnižim PPTR-om. Općenito, ugradnja pothlađivanog izmjenjivača topline poboljšava učinkovitost sustava.
fatcat:rodes7tlejefronceovqaggyje
Citation

Olalekan Bukola, Michael Bolaji, Mabel Rotimi Adu¹, Emmanuel Usunobun Olanipekun², Akinnibosun³. "ENERGY PERFORMANCE OF ENVIRONMENTAL-FRIENDLY R435A AND R161 REFRIGERANTS IN SUB-COOLING REFRIGERATION SYSTEMS."