Correlation of Pressure Drop in the Sintered Fibrous Porous Tube with Permeability and Friction Coefficient

Abstract

In order to enhance the heat transfer performance of heat tubes, porous media are often sintered into them. This increases the heat transfer area due to the surface area being increased by the porous media. Our The test apparatus consisted of a double tube structure, and the length was 150 mm. Previous experiments have shown its usefulness and revealed that a breakthrough in the heat exchanger has occurred. For example, air heated to 200 °C and water cooled to 1 °C flowed inside and outside the heat tube, respectively. In tests with conventional heat tubes, air was discharged at 150 °C through the test section. However, in tubes filled with 50 mm of porous medium, air was discharged at 5 °C. In other words, a conventional tube would need to be 100 times as long. We have already proposed a correlation that can accurately predict the heat transfer coefficient regardless of the pipe diameter and filling length. On this study is about understanding the mechanism of pressure drop and constructing an equation, and We have established a method for predicting the pressure drop of a porous body within approximately ±10%.