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Large-scale heat transfer experiments with supercritical R134a flowing upward in a circular tube

Feuerstein, F.; Coelho Silva, A.; Klingel, D.; Cheng, X.

Abstract (englisch):
Heat transfer experiments with supercritical Freon R134a flowing upward in a circular tube with inner diameter of 10 mm and a heating length of 2495 mm were conducted with a wide range of parameters: mass fluxes of 300–2000 kg/m²s, heat fluxes of 10–200 kW/m², bulk fluid temperature of 50–124 °C and pressures of 4.22–5.51 MPa. Effects of heat flux, mass flux, pressure and inlet temperature on heat transfer behavior are analyzed. Significant heat transfer deterioration is observed above a critical heat flux to mass flux ratio. Six representative correlations were selected and compared with the test data.


Zugehörige Institution(en) am KIT Institut für Fusionstechnologie und Reaktortechnik (IFRT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2017
Sprache Englisch
Identifikator ISSN: 0365-8414, 1431-5254
KITopen ID: 1000071446
Erschienen in Atw
Band ISSUE 2
Heft Vol. 62
Seiten 121 - 125
Projektinformation MWK, MWK ZUK IV, int_14740
Schlagworte supercritical fluid heat transfer heat transfer deterioration comparsion
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