Experimental study on heat transfer and resistance characteristics of H-type finned tube

Abstract

The heat exchanger element H-type finned tube has a high enhancement of heat transfer and excellent self-cleaning property and has evident effect in the boiler renovation, especially in the field of flue gas waste heat recovery. In this paper, the heat transfer and resistance characteristics of Htype finned tube are studied by the experimental system of open high-temperature wind tunnel. The effects of fin width, fin height, fin pitch and air velocity on fin efficiency, convective heat transfer coefficient and pressure drop are examined. It is found that as air velocity, fin height and fin width increase, fin efficiency decreases. Convective heat transfer coefficient is proportional to fin pitch but inversely proportional to fin height and fin width. Pressure drop increases with the increase of fin height and fin width. Then the correlations of fin efficiency, Nu and Eu are fitted.

Study on Heat Transfer and Resistance Characteristics of H-Type Finned Tube

“…A lot of experimental and numerical studies have been conducted on air-side heat transfer performances of fin-and-tube heat exchangers. Yang et al [1] carried out experiment study on a certain configurable H-type finned tube and helically finned tube bank, and obtained H-type finned tube has better characters than helically finned tube with the same configurable parameter. Liu et al [2] conducted experimental study on the characteristics of heat transfer and fluid flow for H-type finned tube, the heat transfer and flow resistance characteristics are studied and comparison between the experiment and the calculating results are performed.…”