Condensation heat transfer on tubes in actual flue gas (Parametric study for condensation behavior)

2003 ◽  
Vol 32 (2) ◽  
pp. 153-166 ◽  
Author(s):  
Masahiro Osakabe ◽  
Kiyoyuki Yagi ◽  
Tsugue Itoh ◽  
Kunimitsu Ohmasa
Keyword(s):  
Heat Transfer ◽  
Flue Gas ◽  
Parametric Study ◽  
Condensation Heat Transfer ◽  
Actual Flue Gas

scholarly journals Condensation Heat Transfer on Tubes in Actual Flue Gas. Experiment using Flue Gas at Different Air Ratios.

1998 ◽  
Vol 64 (626) ◽  
pp. 3378-3383 ◽  
Author(s):  
Masahiro OSAKABE ◽  
Kazuhiko ISHIDA ◽  
Kiyoyuki YAGI ◽  
Tugue ITOH ◽  
Kunimitu OHMASA
Keyword(s):  
Heat Transfer ◽  
Flue Gas ◽  
Condensation Heat Transfer ◽  
Actual Flue Gas

Condensation heat transfer on tubes in actual flue gas

2001 ◽  
Vol 30 (2) ◽  
pp. 139-151 ◽  
Author(s):  
Masahiro Osakabe ◽  
Kazuhiko Ishida ◽  
Kiyoyuki Yagi ◽  
Tugue Itoh ◽  
Kunimitu Ohmasa
Keyword(s):  
Heat Transfer ◽  
Flue Gas ◽  
Condensation Heat Transfer ◽  
Actual Flue Gas

Calculation and Analysis on Condensation Heat Transfer for Pressurized Oxy-Coal Combustion Flue Gas

2013 ◽  
Vol 325-326 ◽  
pp. 346-352
Author(s):  
Jing Lan Dong ◽  
Wei Ping Yan ◽  
Xue Hong He
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Water Vapor ◽  
Film Thickness ◽  
Flue Gas ◽  
Coal Combustion ◽  
Vertical Tube ◽  
Condensation Heat Transfer ◽  
Condensation Rate ◽  
Set Up

For the convective condensation heat transfer of flue gas with a few water vapors produced by pressurized oxy-coal combustion in vertical tube, investigation and calculation were carried out by theoretical analyzing method. Heat transfer mathematical model was set up by modified film model and Nusselt's condensation theory. Calculations were performed for condensation heat transfer at different wall temperatures, Reynolds numbers and water vapor fractions. Results show that with the increase of wall temperature, the condensation rate of flue gas, heat flux and condensation film thickness decrease. And with the increase of Reynolds number of the mixture gas, the condensation rate of flue gas and heat flux increase too, while the condensation film thickness decrease. With the decrease of water vapor fraction, the condensation rate of flue gas and heat flux decrease too, while the decrease of condensation film thickness is not obvious.

Analytical Modeling for Vapor Condensation in the Presence of Noncondensable Gas and Experimental Validation

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Wei Zhang ◽  
Suilin Wang ◽  
Mu Lianbo
Keyword(s):  
Heat Transfer ◽  
Film Thickness ◽  
Latent Heat ◽  
Flue Gas ◽  
Vertical Surface ◽  
Vapor Condensation ◽  
Condensation Heat Transfer ◽  
Wall Area ◽  
Cooling Surface ◽  
Applicable Range

Abstract The sensible and latent heat transfer are two essential considerations in investigating vapor condensation in the presence of noncondensable gases. In this paper, a new model for filmwise condensation heat transfer was developed using similarity-based solution. The expression of gas–liquid interfacial temperature, film thickness, and heat transfer coefficient were derived and calculated, respectively. The analytical results showed that the temperature difference between gas–liquid interfacial and cooling surface is decreased as there is an increase in cooling surface temperature. In addition, the forced-convective condensation heat transfer and film thickness on the vertical surface were experimentally carried out. The proportion of latent heat is 62–67% and relatively larger than sensible heat in the range of wall temperature (17–32.5 °C). The experimental film thickness is less than analytical film thickness by 2–10%. It is because that the liquid film may evaporate back to water vapor in the neighboring wall area due to high temperature of flue gas. Further, a new nondimensional correlation of condensation heat transfer of flue gas is fitted with Nu = 0.62Re0.5Ja0.67 and applicable range is Re = 1000–2500, Ja = 1.7–4.4. The fitting shows a good agreement between experimental and correlated values except some points in the low Nu number. The model proposed is applicable to predict the temperature and velocity distribution for condensation heat and mass transfer of multicomponent gases.

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