Abstract
An experimental study on heat transfer performance of a gravity-assisted heat pipe is described. Dowtherm A has been used as working fluid. The effect of fill ratio, inclination angle, heat length ratio, and thermal resistance on the rate of heat flow were investigated. Finding a dependence of the maximum rate of heat flow on the first two parameters, a corresponding numerical correlation has been formulated. The force of viscosity shear and the force of momentum transfer during the condensation have been accounted for, and, with a theoretical analysis and a numerical solution, a mean heat transfer coefficient in the condensation section is given.
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