High flux film and transition boiling. Final report, April 1988--January 1993

Technical Report · Mon Feb 01 04:00:00 EST 1993

DOI:https://doi.org/10.2172/10136070· OSTI ID:10136070

Witte, L C

An investigation was conducted on the potential for altering the boiling curve through effects of high velocity and high subcooling. Experiments using water and Freon-113 flowing over cylindrical electrical heaters in crossflow were made to see how velocity and subcooling affect the boiling curve, especially the film and transition boiling regions. We sought subcooling levels down to near the freezing points of these two liquids to prove the concept that the critical heat flux and the minimum heat flux could be brought together, thereby averting the transition region altogether. Another emphasis was to gain insight into how the various boiling regions could be represented mathematically on various parts of heating surface. Motivation for the research grew out of a realization that the effects of very high subcooling and velocity might be to avert the transition boiling altogether so that the unstable part of the boiling curve would not limit the application of high flux devices to temperatures less than the burnout temperatures. Summaries of results from the study are described. It shows that the potential for averting, the transition region is good, and points the way to further research that is needed to demonstrate the potential.

• Research Organization: Houston Univ., TX (United States). Dept. of Mechanical Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG05-88ER13893
• OSTI ID: 10136070
• Report Number(s): DOE/ER/13893--T1; ON: DE93010917
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400
FILM BOILING
FREONS
HEAT FLUX
HEAT TRANSFER AND FLUID FLOW
HEATERS
PROGRESS REPORT
SUBCOOLING
TRANSITION BOILING
WATER