12 November 1993 Flow boiling critical heat flux on small heated regions
Author Affiliations +
Abstract
Often, in optical and electronic equipment, heating is concentrated in very small regions, and, because of materials constraints, cooled walls must be as thin as possible. Also, for efficiency, many high-flux cooling designs involve forced-convection boiling heat transfer. Though efficient, a design with boiling heat transfer can be difficult for it must properly account for the complexities of the boiling flux-temperature relationship. Of concern is locating the point of incipience to boiling and the point of maximum nucleate boiling heat flux, Critical Heat Flux (CHF), and describing the complex behaviors in the vicinities of these points. Characteristics of boiling near these points are discussed in terms of boundary layer behavior. Changes in either the heater size or the wall thickness affects the boiling curve, particularly the CHF behavior. Results from experiments which were conducted on small, heated regions are discussed in light of their application to the design of high-power optical and electronic devices. The effects of flow velocity, subcooling, pressure, heating length, dissolved gas content, and flow streamline curvature are addressed.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Terrence W. Simon, Terrence W. Simon, Pey-Shey Wu, Pey-Shey Wu, } "Flow boiling critical heat flux on small heated regions", Proc. SPIE 1997, High Heat Flux Engineering II, (12 November 1993); doi: 10.1117/12.163793; https://doi.org/10.1117/12.163793
PROCEEDINGS
14 PAGES


SHARE
RELATED CONTENT

Enhanced heat-transfer techniques for high heat flux boiling
Proceedings of SPIE (February 25 1993)
Microchannel heatsink with liquid-nitrogen cooling
Proceedings of SPIE (February 25 1993)
Some closed form solutions of the temperature field due to...
Proceedings of SPIE (November 12 1993)
High heat flux spray cooling
Proceedings of SPIE (February 25 1993)
Comparison of high heat flux cooling applications
Proceedings of SPIE (February 25 1993)

Back to Top