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Experimental investigation of the energy efficiency of a linear compressor and comparison with a reciprocating compressor in a small refrigeration system

Kowalczyk Michał Jan, Romaniak Artur, Łęcki Marcin, Gutkowski Artur, Górecki Grzegorz

Archives of Thermodynamics

2023

Vol. 44, no 4

243--260

The conducted experimental studies of the linear compressor concerned the cooling capacity, efficiency, and Energy Efficiency Ratio (EER). Linear compressor performance tests were carried out for the supply voltage of 190–265 V and the supply frequency in the range of 45–65 Hz, which allowed the compressor to be tested outside its typical operating range. Modulation of the performance was achieved using an inverter. The full range of performance characteristics of a linear compressor was presented. The results were compared with a reciprocating compressor for similar displacement volume, which achieved lower EER values by an average of 38% for a pressure ratio above 1.7. The power consumption of a linear compressor is on average two times lower than that of a reciprocating compressor.