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SR5 Conforto Térmico |
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Title:
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STUDY ON THE BEHAVIOUR OF CAPILLARY TUBES WITH REFRIGERANT MIXTURES FLOW USING A SEPARATED FLOW MODEL
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Summary :
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THIS PAPER PRESENTS A NUMERICAL STUDY ON THE PERFORMANCE OF CAPILLARY TUBES WITH R-22, R-407C AND R-410A USING A SEPARATED FLOW MODEL, EXPERIMENTALLY VALIDATED USING DATA FROM PREVIOUS WORK AND LITERATURE. IT IS COMPARED THE MASS FLOW RATE AS FUNCTION OF INLET CONDITIONS (CONDENSING TEMPERATURE AND PRESSURE, SUBCOOLING DEGREE OR INLET QUALITY) FOR A GIVEN GEOMETRY. NUMERICAL RESULTS SHOW THAT, TAKING R-22 AS THE REFERENCE, R-407C MASS FLOW RATES ARE SLIGHTLY HIGHER (ABOUT 5%) AND R-410A PRESENTS ABOUT 30% HIGHER MASS FLOW RATES FOR A FIXED CONDENSING TEMPERATURE. ON THE OTHER HAND, FOR A FIXED CONDENSING PRESSURE, BOTH R-407C (ABOUT 3%) AND R-410A (FROM 1% TO 5%) MASS FLOW RATES ARE LOWER THAN R-22 ONES.
KEYWORDS: CAPILLARY TUBES, REFRIGERANT MIXTURES, HCFC REPLACEMENT |
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Author :
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Fiorelli, Flávio A. S.
Paiva, Marco A. S.
Peixoto, Roberto A.
Silvares, Otávio M.
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Paper View :
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