MICROPROFILED SURFACES FOR HYPERFINE EVAPORATIVE-CONDENSING UNITS

The infl uences of structural parameters (shape, dimensions, structure pitch) on the capillary-transport properties of the wick was studied, and the choice of microstructured wick elements for hyperfi ne evaporative-condensing devices is substantiated. It has been established that steam chambers with conical microstructures are characterized by minimal mass at a high effi ciency in removing thermal loads from hard-to-reach heat-stressed elements. Laboratory technologies for producing microprofi led structures by chemical and electrochemical milling have been developed. Experimental samples of microprofi led structures with a porosity of 65% and a permeability of 91 darcy were obtained. Based on the developed wick (70 × 70 × 0.05 mm³ ), a steam chamber of size 75 × 75 × 0.81 mm³ (working fl uid — water, casing — copper) with a thermal resistance of 0.13 K/W and isothermicity of 1.4^o C was created
The infl uences of structural parameters (shape, dimensions, structure pitch) on the capillary-transport properties of the wick was studied, and the choice of microstructured wick elements for hyperfi ne evaporative-condensing devices is substantiated. It has been established that steam chambers with conical microstructures are characterized by minimal mass at a high effi ciency in removing thermal loads from hard-to-reach heat-stressed elements. Laboratory technologies for producing microprofi led structures by chemical and electrochemical milling have been developed. Experimental samples of microprofi led structures with a porosity of 65% and a permeability of 91 darcy were obtained. Based on the developed wick (70 × 70 × 0.05 mm³ ), a steam chamber of size 75 × 75 × 0.81 mm³ (working fl uid — water, casing — copper) with a thermal resistance of 0.13 K/W and isothermicity of 1.4^o C was created
Author:  O. L. Voitik, K. I. Delendik, N. V. Kolyago, O. G. Penyazkov, L. Yu. Roshchin
Keywords:  microprofi led surface, evaporative-condensing devices, steam chamber, wick, porosity, permeability
Page:  1867