Exergy Analysis for Heat Pipe over a Permeable Vertical Thin Cylinder In a Porous Medium

ADMT Journal

مقاله 1، دوره 2، شماره 1، آذر 2008   

نویسندگان

Mehdi Asghari^* ؛ Cirus Aghanajafi

چکیده

Today heat pipes are widely used by the designers in industries such as air conditioning and heat transformers for optimizing energy consumption. Existence of a permeable cylinder at the beginning and ending part of the heat pipe was considered on the basis of  two assumptions for surface temperature of the cylinder and the mainstream velocity at the outer edge of the boundary layer vary linearly with the axial distance x from the leading edge. In this paper solution has been presented analytically with introduction of mixed convection parameter  and coefficient of porosity . Various forms of flow were examined and the optimum state for minimum entropy generation was suggested.