Critical heat flux in helically coiled tubes

Journal Article · Sat Oct 31 23:00:00 EST 1981 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3244523· OSTI ID:5767704

Jensen, M K; Bergles, A E

A study of boiling R-113 in electrically heated coils of various diameters is reported. Sub-cooled critical heat flux (CHF) is lower with coils than with straight tubes. The differences increases as mass velocity and ratio of tube diameter to coil diameter (d/D) increases. On the contrary, quality CHF is enhanced in increases with d/D;CHF initially increases with increasing mass velocity, but decreases after a maximum is reached. Operational problems, in particular upstream dryouts, can occur if a coiled tube is operated with low to moderate subcooling neat the inlet and with moderately high heat fluxes.

• Research Organization: Department of Mechanical Engineering, The University of Wisconsin-Milwaukee, Milwaukee, Wisc. 53201
• OSTI ID: 5767704
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 103:4; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOILING
CONFIGURATION
CRITICAL HEAT FLUX
CURRENTS
ELECTRIC CURRENTS
HEAT EXCHANGERS
HEAT FLUX
HEATING
HELICAL CONFIGURATION
PHASE TRANSFORMATIONS
TUBES