COMPOSITE SCREEN WICKS FOR HEAT PIPES

Abstract

Generally, an optimal wick structure requires high heat conductivity across the wick thickness for a small temperature drop, small surface pores for large capillary pressure, but large internal pores for minimal liquid flow resistance. Screen wicks are most available, because the possibility of their arrangement in different manner on the heat pipe internal wall. The below discussed properties of the wick are represented by the permeability, and the heat conductivity. But the saturated screen wick is a non homogeneous and anisotropic material. The heat conductivity along and across of a screen wick was calculated using series, parallel and mixed model. The experimental measurement carried out for the transversal and longitudinal conductive heat transfer coefficient was served to choice the best model