Thermal Performance of three stage cascade vapour compression refrigeration systems using new HFO in high and intermediate temperature cycle and R32 ethylene and hydrocarbons in ultra-low temperature cycle refrigerants

This papers mainly deals with the use of ecofriendly HFO refrigerants in the medium temperature range (up to -50oC) using Low GWP ecofriendly R245fa in Intermediate temperature cycle up to -95oC and R600a, R290 in ultra-low temperature (-155oC) of cascade refrigeration system and it was found that Hydrocarbon R-600a gives best thermodynamic first and second law performances with lowest exergy destruction ratio in the ultra-low temperature between -110oC to -130oC. The thermodynamic first and second law performances of R32 and ethylene are nearly similar and less than R290. Therefore use of hydrocarbons can also be promising by taking appropriate safety measures because mostly hydrocarbons are flammable in nature.R1234ze(z) gives best/highest thermodynamic performances with lowest exergy destruction ratio as compared to R1224yd(Z) and R1234ze(E) and R1243zf used in intermediate temperature for R1234ze(Z) /R1234ze(E) & R1243zf, R1233zd(E) in high temperature cycle using R600a, R290 and R32 and Ethylene in ultra-low temperature ranges between -110oC to -130oC .However, lowest performances was observed by using R134a in high temperature circuit and R1234yf in low-temperature cycle . the thermodynamic performances of cascade vapour compression refrigeration systems was compared between HFC-134a and HFO-1234yf and it is found that HFO-1236mzz(z) and R1225ye(Z) gives similar results as compared with R134a used in intermediate temperature cycle up to -50oC of evaporator temperature

This article is published in peer review journal and open access journal, International journal of research in engineering and innovation (IJREI) which have a high impact factor journal for more details regarding this article, please go through our journal website.

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