Abstract
The present investigation is aimed at finding the suitability of using vegetable oil-based polyol ester as biodegradable refrigeration oil. Rapeseed oil-based pentaerythritol ester was synthesized via successive trans-esterification route. The formulation was blended with synthetic refrigeration oil (POE68) in the fractions of 25%, 50% and 75% by volume. The tribological investigation involving various refrigeration oils was done using the four-ball tribometer. This study further quantifies the influence of biodegradable refrigeration oils on the performance of domestic refrigerator compressor using vapour compression refrigeration test setup. The process of tribological analysis brought to light the comparable anti-friction and excellent wear reduction behaviour with the blended refrigeration oil sample (BIO50—i.e., 50% by vol. of pentaerythritol ester of rapeseed oil and 50% by vol. of POE68). It was noticed that the BIO50 had considerable rise in coefficient of performance (COP) of about 41.7% and prime impact on the performance of refrigeration compressor. The outcome of the experimental study is supportive in finding vegetable oil-based refrigeration oil to substitute partially the synthetic grade for the domestic refrigerator compressor.
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