16-01-2014, 12:45 PM
Heat Dissipation in a stove
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Abstract:
The aim of the experiment is to find the heat transfer by natural convection due to temperature difference between the surface, which it is the heater, and the moving fluid, which it is air. The surface and fluid temperatures were measured at steady state condition using temperature sensor, then the unknown values for the heat flux and convection heat transfer coefficient were calculated using convection heat transfer equations.
Theory:
Heat transfer is a transit due to a temperature difference, whenever there exists a temperature difference in a medium or between media, heat transfer can occur. It can be transferred by three different modes: conduction, convection, and radiation.
Heat transfer by convection refers to heat transfer that will occur between a surface and a moving or stationary fluid when they are at different temperatures.
Convection heat transfer may be classified, according to the nature of the flow, for two types: forced convection, when the flow as caused by external means, and free or (natural) convection, when the flow is induced by buoyancy forces.
Conclusion:
It was a good idea to conduct heat transfer calculations on our daily activities, the results were satisfying. h convection was correlated by simple correlations. The value of h was small 9.76 suitable with natural flow.