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SR5 Conforto Térmico |
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Title:
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TAKING INTO ACCOUNT OF OIL-REFRIGERANT MIXTURES INFLUENCE DURING
EXPERIMENTAL TESTING OF REFRIGERATION COMPRESSORS.
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Summary :
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ABSTRACT. THIS PAPER PRESENTS AN INVESTIGATION ON THE PERFORMANCE OF A RECIPROCATING HERMETIC REFRIGERATION COMPRESSOR, USING A SUPERHEATED VAPOR PHASE CYCLE. AS A RESULT FROM EXPERIMENTS, THE UNCERTAINTY OF ENTHALPY CALCULATION, MAINLY AT COMPRESSOR EXHAUST, DUE TO THE HIGH OIL SOLUBILITY AT HIGH PRESSURES, INDICATES THAT BIG ERRORS IN ENERGY BALANCE, LEADS TO BIG DIFFERENCES IN REFRIGERANT MASS FLOW RATE WHEN COMPARED WITH CATALOGS INFORMATION. USING AN EQUATION OF STATE FOR THESE MIXTURES AND THERMODYNAMIC RELATIONSHIPS, AS WELL AS TAKING INTO CONSIDERATION LOW OIL PARTIAL PRESSURE IT WAS POSSIBLE TO CALCULATE THE EFFECTS OF ENTHALPY ON MASS FLOW RATE CALCULATIONS, CONSIDERING MIXTURE EFFECT. RESULTS OBTAINED ALLOW, COMPARISON WITH EXPERIMENTAL RESULTS, AND SHOWS THAT THESE EFFECTS SHOULD BE TAKEN INTO ACCOUNT IN REFRIGERATION TESTING METHODOLOGIES PROPOSED IN LITERATURE.
KEY-WORDS: COMPRESSOR, LUBRICANT, REFRIGERANT, OIL, MIXTURE.
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Author :
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Duarte, Jose A.
Hernandez, Oscar S.
Lawinscky, Marco Antonio 0
Pimenta, Joao M.
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Paper View :
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