Unsteady State Heat Loss in Thermal Insulation Pipe

Abstract

For global environmental protection, it is necessary to promote effective use of energy resources. As a method of attaining this purpose, it is also important to reduce heat loss during heat energy transport. In transferring heat energy by fluid, it is well known that the heat capacity of piping affects the heat loss at unsteady state. For the purpose of reducing heat loss from the piping, we tried to manufacture a piping made of only thermal insulation material, which we called a thermal insulation pipe (TIP). We proved its effectiveness by performing experiments of the thermal response at the transient state in comparison between a TIP and a piping which is composed of a metal pipe covered with thermal insulation material. Then we performed numerical calculations and simple analysis of unsteady state heat loss in both piping system. In this paper, we describe the effectiveness of the TIP from the major results of calculations.