An experimental investigation of the effect of waves on vapour side heat and mass transfer in filmwise condensation inside a vertical tube

1983 ◽  
Vol 9 (1) ◽  
pp. 37-48 ◽  
Author(s):  
P.V. Deo ◽  
D.R. Webb
Keyword(s):  
Mass Transfer ◽  
Experimental Investigation ◽  
Heat And Mass Transfer ◽  
Vertical Tube

NUMERICAL STUDIES ON VERTICAL TUBULAR GENERATOR IN VAPOR ABSORPTION REFRIGERATION SYSTEM

2011 ◽  
Vol 19 (02) ◽  
pp. 121-129 ◽  
Author(s):  
PASUPATHY BALAMURUGAN ◽  
ANNAMALAI MANI
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Computer Code ◽  
Vertical Tube ◽  
Hot Water ◽  
Convective Boiling ◽  
Model Equations ◽  
Absorption Refrigeration System ◽  
Problem Solvers ◽  
Vapor Absorption Refrigeration

A model has been developed based on Colburn–Drew type formulation to analyze a vertical tube in tube stainless steel generator with forced convective boiling. Desorption of refrigerant vapor from refrigerant–absorbent solution takes place in the inner tube of the generator, when hot water through the annulus is used as heating medium. Simultaneous heat and mass transfer phenomena of desorption are described mathematically using the mass and energy balances, considering the heat and mass transfer resistances in liquid as well as vapor phases. Model equations are solved simultaneously by means of initial value problem solvers using explicit Runge–Kutta method with 4th order accuracy. A computer code has been developed in MATLAB to obtain the results. A parametric analysis has also been performed to study the effect of various parameters on the performance of the generator.

Heat and mass transfer in commercial desorbers with a heating surface in the form of a vertical tube bundle and a thermofluidized heat-carrier bed

1986 ◽  
Vol 50 (5) ◽  
pp. 549-553
Author(s):  
A. P. Nesenchuk ◽  
A. M. Gabri�l' ◽  
E. N. Antonishina ◽  
V. A. Sednin ◽  
A. A. Sklyar ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Heat Carrier ◽  
Tube Bundle ◽  
Heating Surface ◽  
Vertical Tube

Heat and Mass Transfer Analogy of Steam Condensation With Air Over Vertical External Surface

2016 ◽  
Author(s):  
Jiqiang Su ◽  
Yuxiang Wu ◽  
Shuliang Huang ◽  
Huiqiang Xu ◽  
Yanmin Zhou
Keyword(s):  
Experimental Data ◽  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
External Surface ◽  
Vertical Tube ◽  
External Diameter ◽  
Thermodynamic Process ◽  
Layer Model ◽  
Steam Condensation ◽  
Predicted Values

During the steam condensation, the presence of non-condensable gases is an important issue affecting the efficiency of the whole thermodynamic process. For this reason, many researchers investigated it by theoretical or experimental methods. A heat and mass transfer analogy model on steam condensation in presence of air over the vertical external surface based on the diffusion layer model is modified in the present paper. Based on previous authors’ experience, the suction effect at the gas-liquid interface and other analogy drawbacks are identified and overcome by supplementing it with more detailed analysis as well as targeted experiments. The experimental data obtained for condensation, outside vertical tube with an external diameter of 38 mm, of air/steam and helium/air/steam mixture, have been used to verify the present heat and mass transfer analogy formulation. By comparing against different available experimental data and previous formulations, the heat and mass transfer analogy formulation is demonstrated to be a accurate enough theoretical approximation. The deviation between predicted values of the new model and experiment results of this paper is less than 15% which has relative higher precision.

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