Authors:
Yasir Ghazi Saadoon,Issam Mohammed Aljubury,DOI NO:
https://doi.org/10.26782/jmcms.2019.12.00031Keywords:
COP,Cooling capacity,automotive air conditioning,alternative refrigerant,R513A,Abstract
Therefrigeration sector has great impact on world climate changes. The phase-out of hydrofluorocarbons (HFCs) often needs to make choices between high GWP alternatives and more planet-friendly alternatives. In this regard, performance of refrigeration systems in countries characterized by long, hot, summers face problems in identifying suitable alternatives due to the impact of such temperatures. This study stands for technical paper to conduct an experimental comparison for the use of R513A as a substitute for R134a. Energy analysis was performed to evaluate performance of both refrigerants. The research was implemented by a device that simulate an automobile (A/C) system unit capacity 3kW. effect of several variables were studied: ambient temperature was varied from 30oC to 50oC step by 4oC, and internal load was (700, 1000 and 1300)W, speed of compressor was 1450 r.p.m and 2900 r.p.m. The results showed that average value of COP of R513A was convergent with slightly higher than R134a by about 1%-2%, and average cooling capacity, mass flow rate were higher by about 1.6%-3%, 15%-17% respectively. The compression ratio and temperature of discharge were less than R134a by about4.6% - 6% and7.5%-8% respectively. So R513A could be considered as a good alternative for R134a without any modification on A/C system.Refference:
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