Critical Heat Flux During Natural Convective Boiling in Vertical Rectangular Channels Submerged in Saturated Liquid

1982 ◽  
Vol 104 (2) ◽  
pp. 300-303 ◽  
Author(s):  
M. Monde ◽  
H. Kusuda ◽  
H. Uehara
Keyword(s):  
Experimental Study ◽  
Heat Flux ◽  
Critical Heat Flux ◽  
Atmospheric Pressure ◽  
Heated Surface ◽  
Saturated Liquid ◽  
Convective Boiling ◽  
Flux Data ◽  
Rectangular Channels ◽  
Generalized Correlation

An experimental study of the critical heat flux has been carried out for natural convective boiling at atmospheric pressure in vertical rectangular channels. Experiments in four kinds of test liquids (water, ethanol, freon 113, and benzene) have been made for the ratio l/s less than 120, in which l is the length of the heated surface and s is the width of the channels. A generalized correlation for the critical heat-flux data in the four test liquids is evolved.

Experimental Investigation to Boiling Heat Transfer on a Heated Surface with Multiple Impinging Jets

2013 ◽  
Vol 663 ◽  
pp. 477-482
Author(s):  
Bin Ni ◽  
Jie Wen ◽  
Jun Liao ◽  
Hong Wu Deng
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Flux ◽  
Atmospheric Pressure ◽  
Boiling Heat Transfer ◽  
Heated Surface ◽  
Impinging Jets ◽  
Boiling Regime ◽  
Multiple Jets ◽  
Jet Velocity

On the condition of water multiple jet impingements, a steady-state experimental study had been conducted for boiling heat transfer in an atmospheric pressure. The jet velocity was 0.95~1.59m/s and the sub-cooling degrees of jet fluid were 30~83°C.The results revealed that increasing either jet velocity or sub-cooling degrees would promote the heat flux through heated surface, and the effect was more pronounced in partial boiling regime than fully-developed boiling regime. The heat transfer with multiple jets is enhanced due to disturbance of different impingements. With modification of the factor which related to flow distance of fluid on heated surface, correlation which is applicable to one single impinging jet boiling, can also be used to calculate critical heat flux(CHF) in boiling heat transfer with multiple impinging jets.

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