Etude expErimentale et numErique des caractEristiques de transfert de chaleur grAce au bilan thermique dans un compresseur linEaire
Experimental and numerical study of heat transfer characteristics using the heat balance in a linear compressor
Abstract A linear compressor was divided into several control volumes, and its thermal performance was analyzed by maintaining the whole energy balance throughout the heat transfer analysis for each control volume. During the steady state performance test of the compressor, basic measurements of the temperature and pressure were performed by using a calorimeter. First, the energy flow of each control volume was defined using the results of the measurements, and then heat transfer analysis was conducted. Next, the thermal network was defined by using a correlation for the energy balance. A software tool for compressor simulation was developed using a thermal network analysis in order to estimate the energy efficiency ratio (EER) according to the changes in thermal properties of the compressor. Experimental results show that the simulation tool is satisfied up to a 5% change in the EER according to variations in the ambient temperature and mixing ratio of the refrigerant. Highlights A thermal analysis of the compressor was performed using a heat balance and control volume. The analysis method shows that the error rate between the experimental and simulation results is within 5%. The refrigerant mixing region that exists between the suction pipe and the suction muffler is the most sensitive part. The EER of the compressor is expected to be improved 0.2 by direct suction as a result of reducing the mixing ratio. The proposed analysis method can be used to analyze the thermal performance of a system with a complex configuration and multiple components.
Energy balance . Analysis method . Experimentation . Correlation . Heat transfer . Overall heat transfer coefficient (UA) . Linear compressor . Bilan énergétique . Méthode d'analyse . Expérimentation . Corrélation . Transfert de chaleur . Coefficient de transfert de chaleur global (UA) . Compresseur linéaire.
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