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Effect of Material Properties on Performance and Brazing of Aluminum and Copper/Brass Radiators
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English
Abstract
This paper assesses the effect of material thermal properties on the performance and manufacture of brazed radiators made of aluminum and of copper/brass. Analysis is presented to show that copper/brass cores can be closely weight competitive with brazed aluminum. This is because the higher thermal conductivity of copper allows use of thinner fins. The thinner fins result in approximately 38% lower air pressure drop for the same frontal area and performance. If the cu/br design is designed for the same air pressure drop as the aluminum core, one may obtain frontal area reductions as large as 16%. Analysis of the effect of the different core materials and material thickness on the core heating time is presented. It is concluded that the thick header controls the core pre-heat time. Further, it is estimated that the required pre-heat time for cu/br and aluminum cores would be approximately equal. Because the specific heat of copper (or brass) is 42% that of aluminum, the preheat thermal energy for a cu/br core having the same weight as an aluminum core would be 42%.
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Citation
Webb, R., "Effect of Material Properties on Performance and Brazing of Aluminum and Copper/Brass Radiators," SAE Technical Paper 971817, 1997, https://doi.org/10.4271/971817.Also In
References
- Dillen, E. Webb, R. L. 1994 “A Correlation Prediction to Predict Heat Transfer and Friction for the Louver Fin Geometry,” paper No. 940504 SAE International Congress Detroit, MI
- Incropera, F. P. DeWitt, D. P. 1996 Fundamentals of Heat and Mass Transfer 4th John Wiley & Sons New York
- Sundberg, R. Tapper Beal, R. Melnyk, W. 1995 “Optimized Brazed Copper-Brass Radiator,” SAE VTMS-2 Conf. London
- Webb, R. L. Farrell, P. 1990 “Improved Thermal and Mechanical Design of Copper/Brass Radiators,” SAE Technical Paper # 900724 SAE Int'l Cong. February Detroit, MI SAE Transactions 99 737 750 1990
- Webb, R. L. “Advanced Technology Copper/Brass Radiators Competitive with Brazed Aluminum,” 1995 Vehicle Thermal Management Systems Conference Proceedings SAE 51 61
- Webb R. L. Chang Y. Wang C. 1995 “Heat Transfer and Friction Correlations for the Louver Fin Geometry,” 1995 Vehicle Thermal Management Systems Conference Proceedings SAE 533 541