Experimental comparison of energy consumption of household freezer with constant speed compressor and variable speed compressor

In this paper, the energy consumption of a household freezer is compared with a constant speed compressor and a variable speed compressor. The highest grade of energy consumption in household freezers is related to household freezers with variable speed compressors. To compare energy consumption in household freezers, a single speed compressor with a cooling capacity of 185 watts and a performance factor of 1.92, and a multi speed compressor with different speeds in terms of revolutions per minute 1300, 1600, 2000, 3000, 4500 and with a cooling capacity of 85, respectively., 108, 130, 200, 260 watts and performance coefficients of 1.80, 1.88, 1.90, 1.80, 1.60 were used respectively. In both compressors, one type of hydrocarbon gas is used and the amount of refrigerant in both types is almost equal. The experimental results showed that variable speed systems, in addition to more stable temperatures and reduced energy consumption, also cause rapid freezing due to their different speeds. A variable speed compressor reduces energy consumption by 24% per day compared to a constant speed compressor.