Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
EXERGY ANALYSIS OF HERMETIC RECIPROCATING COMPRESSORS ADOPTED IN HOUSEHOLD REFRIGERATION SYSTEMS
Submission Author:
Iana Mota Araujo , SE , Hungary
Co-Authors:
Iana Mota Araujo, Cesar Deschamps
Presenter: Iana Mota Araujo
doi://10.26678/ABCM.ENCIT2020.CIT20-0326
Abstract
Hermetic reciprocating compressors are prevalent in small domestic and light commercial refrigeration systems. Due to the growing demand for energy-efficient products, these compressors are currently highly optimized, and their further improvement requires suitable methods to identify their main sources of inefficiency. The second law of thermodynamics deals directly with irreversibilities and hence allows the unambiguous assessment of these inefficiencies. The present paper reports a method to identify and quantify inefficiencies based on the second law of thermodynamics. This method is then used to make the inventory of energy losses, expressed as exergy destruction, of a reciprocating compressor used in household refrigeration systems. The inventory of losses allowed a clear distinction between the main causes of inefficiency, by dividing the total loss into partial losses associated with different phenomena. The results for two operating conditions show that heat transfer contributes considerably to the exergy destruction in the compressor.
Keywords
Refrigeration, Reciprocating compressor, Efficiency, energy, exergy
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