Evaluation of Heat Transfer Performance of Double-tube Heat Exchangers with Uniporous Structure Fabricated by Explosive Welding Technique

Abstract

We aim to propose a heat transfer promoter using uniporous structure fabricated by explosive welding technique toward its practical use. In this study, we evaluate the heat transfer performance of a double-tube heat exchanger in which the outer-tube channel has the uniporous structure and the inner tube is a circular tube. The heat is exchanged between hot water passing through in the inner tube and cold air flowing in the outer porous tube. The heat transfer quantity and the temperature efficiency per unit volume show higher performance than those of a commercial double tube heat exchanger with similar geometry.