IMPROVEMENT OF A NEW TYPE OF GAS-TO-GAS HEAT EXCHANGER EFFICIENCY AND EFFECTIVE THERMAL INSULATION BY A POROUS MEDIUM

Toshio Tomimura
Institute of Advanced Material Study, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

Motoo Fujii
Institute of Advanced Material Study, Kyushu University, Kasuga, Fukuoka 816-8580, Japan

T. lida
Interdisciplinary Graduate School of Engineering Science, Kyushu University, Fukuoka 816-8580, Japan

Ryozo Echigo
Department of Mechanical Engineering, Shibaura Institute of Technology, Minato-ku, Tokyo 108-0023, Japan

Abstract

Based on an effective energy conversion method between flowing gas enthalpy and thermal radiation, a new type of gas-to-gas heat exchanger has been developed by Echgo et al. In this study, in an attempt to improve the heat exchanger efficiency and at the same time to insulate the system effectively, an advanced type of the heat exchanger with a porous heat recovery section is proposed. Effects of principal parameters on its heat transfer characteristics are investigated analytically and experimentally.