Nucleate boiling of FC-87/FC-72 zeotropic mixtures on a horizontal copper disc |
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Authors: | A. R. Schlindwein,F. O. Martin Suffix" >Jr,M. Misale,J. C. Passos |
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Affiliation: | (1) Departamento de Engenharia Mecanica, LEPTEN/Boiling, Laboratórios de Engenharia de Processos e Tecnologia de Energia, Boiling Group EMC, Universidade Federal de Santa Catarina, Caixa Postal 476, Florianópolis, SC, CEP 88040-900, Brazil;(2) Dipartimento di Ingegneria della Produzione, Termoenergetica e Modelli Matematici, Via All’Opera Pia, 15-a, 16145 Genoa, Italy |
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Abstract: | This paper presents nucleate boiling experimental results, at atmospheric pressure, for heat fluxes q ≤ 40 kW/m2, for FC-87/FC-72 binary mixtures in molar fractions of 0/100, 25/75, 50/50, 75/25, 85/15 and 100/0, at saturation temperatures for pure fluids and bubble points for mixtures. The test section was an upward facing copper disc of 12 mm diameter and 1 mm thickness. The experimental heat transfer coefficient was compared with the correlations of Rohsenow (1952), as reported by Rohsenow et al. (Handbook of heat transfer, McGraw-Hill, New York, 1998), Stephan and Abdelsalam (Int J Heat Mass Transfer 23;73–78, 1978) and Cooper (Int Chem Eng Symp Ser 86:785–792, 1984) for pure fluids and the semi-empirical models of Stephan and Körner (Chem Ing Tech Jahrg 7:409–484, 1969), Thome (J Heat Transfer 104:474–478, 1982), Fujita et al. (1996), as reported by Rohsenow et al. (Handbook of heat transfer, McGraw-Hill, New York, 1998), Fujita and Tsutsui (Int J Heat Mass Transfer 37(1):291–302, 1994) and Calus and Leonidopoulos (Int J Heat Mass Transfer 17:249–256, 1973) for mixtures. |
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