Numerical Analysis of a Steam Reformer Coupled With a Combustion Burner

2010 ◽  
Vol 7 (6) ◽  
Author(s):  
Joonguen Park ◽  
Joongmyeon Bae ◽  
Shinku Lee ◽  
Myungjun Kim
Keyword(s):  
Heat Transfer ◽  
Steam Reforming ◽  
Operating Parameter ◽  
Feed Ratio ◽  
Steam Reformer ◽  
Combustion Gas ◽  
Transfer Rates ◽  
Fuel Feed ◽  
Combustion Gases ◽  
Reactor Temperature

This study focuses on a numerical simulation of a steam reforming system. The steam reforming system consisted of a cylindrical steam reformer and a combustion burner. The heat was supplied to an endothermic steam reformer from combustion gases. The correlation between the performance and the shape of the system was studied using two different configurations. The first configuration utilized a flame guide between the combustion burner and the steam reformer, whereas the other did not. The flame guide changed the flow of the combustion gas, which affected the heat transfer rate from the burner to the reformer. Reactor temperature profiles, heat transfer rates, fuel conversions, and hydrogen yields were calculated. In addition, the fuel feed ratio between the burner and the steam reformer was manipulated as an operating parameter.

Investigation of a Steam Reforming System of Methane Integrated With a Combustion Burner

2008 ◽  
Author(s):  
Joonguen Park ◽  
Shinku Lee ◽  
Joongmyeon Bae ◽  
Myungjun Kim
Keyword(s):  
Steam Reforming ◽  
Homogeneous Model ◽  
Operating Parameter ◽  
Feed Ratio ◽  
Steam Reformer ◽  
Combustion Gas ◽  
Transfer Rates ◽  
Fuel Feed ◽  
Combustion Gases ◽  
Reactor Temperature

The objective of this study is to analyze the steam reforming system using numerical method. The system consists of a cylindrical-type steam reformer and a combustion burner. Heat is supplied to the endothermic steam reformer by the combustion gases which flow around the reformer. Eddy Break-Up (EBU) model is incorporated for the combustion reaction, and pseudo-homogeneous model is used for the steam reforming reaction. The temperature at the reformer center and the concentration of species at the outlet are compared with the measured data for code validation. The correlation between the performances and the shapes of the system has been studied by using two different configurations. One has the flame guide between the combustion burner and the steam reformer, and the other does not. The flame guide makes the flow of the combustion gas changed. The operating parameters are reactant flow rates which are supplied to the steam reformer and the combustion burner. Reactor temperature profiles, heat transfer rates, fuel conversion, and the hydrogen yields are calculated as the numerical results. Moreover, fuel feed ratio between the burner and the reformer is also manipulated as an operating parameter to discuss about efficiency.

HEAT TRANSFER PECULIARITIES IN HETEROGENEOUS SYSTEMS WITH HIGH UNSTEADY-STATE HEAT TRANSFER RATES

1970 ◽  
Author(s):  
N.V. Antonishin ◽  
S. S. Zabrodsky ◽  
L.E. Simchenko ◽  
V.V. Lushchikov
Keyword(s):  
Heat Transfer ◽  
Heterogeneous Systems ◽  
Unsteady State ◽  
Transfer Rates ◽  
State Heat

APPLICATION OF ADSORPTION METHOD FOR DETERMINATION OF LOCAL CONVECTIVE HEAT TRANSFER RATES

1974 ◽  
Author(s):  
S. Koncar-Djurdjevic ◽  
M. Mitrovic ◽  
S. Cvijovic ◽  
G. Popovic ◽  
Dimitrije Voronjec
Keyword(s):  
Heat Transfer ◽  
Convective Heat Transfer ◽  
Convective Heat ◽  
Adsorption Method ◽  
Transfer Rates

AN EXPERIMENTAL AND NUMERICAL STUDY OF HEAT TRANSFER IN A SIMULATED COLLECTOR FOR A SOLAR DRYER

1993 ◽  
Vol 17 (2) ◽  
pp. 145-160
Author(s):  
P.H. Oosthuizen ◽  
A. Sheriff
Keyword(s):  
Heat Transfer ◽  
Numerical Study ◽  
Local Heat Transfer ◽  
Lower Surface ◽  
Local Heat ◽  
Electrical Heating ◽  
Temperature Profiles ◽  
Measured Temperature ◽  
Transfer Rates ◽  
Thermocouple Probe

Indirect passive solar crop dryers have the potential to considerably reduce the losses that presently occur during drying of some crops in many parts of the “developing” world. The performance so far achieved with such dryers has, however, not proved to be very satisfactory. If this performance is to be improved it is necessary to have an accurate computer model of such dryers to assist in their design. An important element is any dryer model is an accurate equation for the convective heat transfer in the collector. To assist in the development of such an equation, an experimental and numerical study of the collector heat transfer has been undertaken. In the experimental study, the collector was simulated by a 1m long by 1m wide channel with a gap of 4 cm between the upper and lower surfaces. The lower surface of the channel consisted of an aluminium plate with an electrical heating element, simulating the solar heating, bonded to its lower surface. Air was blown through this channel at a measured rate and the temperature profiles at various points along the channel were measured using a shielded thermocouple probe. Local heat transfer rates were then determined from these measured temperature profiles. In the numerical study, the parabolic forms of the governing equations were solved by a forward-marching finite difference procedure.

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