POROUS METALLIC SURFACES FOR ENHANCED BOILING HEAT TRANSFER

The paper presents procedures for obtaining porous metallic surfaces by metallization. Are described methods and technological parameters used for that type of metallization. It is mentioned the importance of improving heat transfer in general and for vaporization in special, the methods utilized. After obtaining metallic porous surfaces, they are used for enhanced heat transfer surfaces healed from inside and boiling liquids. Are analyzed features of enhanced heat transfer on surface covered with porous metallic layer. In an experimental installation, designed and built by authors, with the obtained surfaces that cover copper tubes, we have made tests for compare these surfaces behavior with tube surfaces as derived from manufacturing process (smooth). In this paper are presented the results obtained.