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S25 Métodos Numéricos |
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Title:
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TWO-DIMENSIONAL CONJUGATE HEAT TRANSFER IN A FLAT PLATE SOLAR COLLECTOR
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Summary :
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SUMMARY. IN THIS WORK, THE EFFECTS OF A TWO-DIMENSIONAL CONVECTION AND CONDUCTION CONJUGATE HEAT TRANSFER ON A CROSS SECTION OF A FLAT PLATE SOLAR COLLECTOR ARE INVESTIGATED. THROUGH THE FINITE ELEMENT METHOD, A SIMULTANEOUS SOLUTION OF MOMENTUM AND ENERGY EQUATIONS FOR ANALYSIS OF THE HEAT EXCHANGE IN THE FLUID (WATER) AND IN THE SOLID (ABSORBER PLATE, BACK INSULATION AND DUCTS) IS OBTAINED. THE RESULTS ARE COMPARED TO THE ONE-DIMENSIONAL UNCOUPLED FORMULATION USED IN THE DESIGN OF SOLAR COLLECTORS, FOR DIFFERENT VALUES OF THE TUBE THERMAL CONDUCTIVITY AND THE DISTANCE BETWEEN THE TUBES. THIS ANALYSIS ALLOWS THE EVALUATION OF THE ERROR DUE TO THE ASSUMPTION MADE IN THE ONE-DIMENSIONAL UNCOUPLED FORMULATION FOR THE DETERMINATION OF USEFUL ENERGY GAIN PER UNIT OF COLLECTOR LENGTH AND FOR THE COLLECTOR EFFICIENCY.
KEYWORDS: CONJUGATE HEAT TRANSFER, FINITE ELEMENT METHOD, SOLAR COLLECTORS.
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Author :
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Duarte, Juliano 0
Zaparoli, Edson Luiz
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Paper View :
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