Abstract
There are several methods for heat transfer enhancement. For example, one can attach various fins on the heat-transfer surface, process the surface roughly, insert twisted tape, and so on. These methods increase the heat-transfer coefficient or area by manufacturing changes to the heat transfer surface. However, one must take into consideration the deterioration of the attached fins on the tubular surface in the design of the heat exchanger. The objective of this study is the clarify characteristics of heat transfer and pressure drop in a channel by inserting metallic wire with high porosity. A heat transfer experiment has been performed using a horizontal circular tube to obtain the heat transfer characteristics in the channel with the inserted wire. In this paper, the effects of porosity, wire diameter and wire material are discussed.
