This paper presents results for FC72 and FC87 saturated and subcooled nucleate pool boiling, at atmospheric pressure, on a downward facing surface and in confined spaces between a heated copper disk (diameter 12 mm and thickness 2 mm) and an unheated surface, for distances varying between 0.2 and 13 mm. At saturated boiling and low heat flux (645 kW/m2) a decrease in the distance between the plates causes an enhancement of the boiling. At subcooled boiling the results show that the heat transfer coefficient decreases with a reduction in the distance between the plates. A visualization of the subcooled boiling shows the effect of confinement and heat flux on the liquid–vapor configuration.
Confined boiling of FC72 and FC87 on downward facing heating copper disk,
MISALE, MARIO;
2004-01-01
Abstract
This paper presents results for FC72 and FC87 saturated and subcooled nucleate pool boiling, at atmospheric pressure, on a downward facing surface and in confined spaces between a heated copper disk (diameter 12 mm and thickness 2 mm) and an unheated surface, for distances varying between 0.2 and 13 mm. At saturated boiling and low heat flux (645 kW/m2) a decrease in the distance between the plates causes an enhancement of the boiling. At subcooled boiling the results show that the heat transfer coefficient decreases with a reduction in the distance between the plates. A visualization of the subcooled boiling shows the effect of confinement and heat flux on the liquid–vapor configuration.
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