Experimental Investigation on Domestic Refrigerator Providing Subcooling by Using Eco Friendly Refrigerant

Abstract

Domestic refrigerators using different refrigerants such as R11, R12, NH3, CO2, etc. The major problems facing these refrigerants are environmental impact, toxicity, flammability, and high pressure, making them more dangerous than other refrigerants according to environment and safety issues. Present R134a refrigerant using in domestic refrigerators because of their thermal properties, but it may be harmful to human health. So, isobutane (R600a) is a better replacement of R134a because it is ecofriendly than all other refrigerants. The current work focuses on increasing the vapor compression refrigeration system's performance by providing a 150 cm length of a subcooling coil for different (R134a and R600a) refrigerants. The results showed that the refrigeration system's sub-cooler enhanced system performance by reducing the compressors' work input and increasing refrigeration capacity. R600a showed better performance than R134a refrigerant at all conditions but took care of R600a refrigerant because of its explosive nature.