Correlations of heat transfer and flow characteristics of H-type finned tube bank with different arrangements

Low-temperature economizer arrangement was introduced and the characteristics of anti-abrasion and anti- ash-deposition of H-type fin tube bundle were investigated. Numerical simulation was performed on the heat transfer and flow characteristics of H-type finned tube bank with in-line and staggered arrangement. Results show that when longitudinal tube increases up to 15th rows and more,it has little impact on Nu and Eu. Inlet fluid velocity,fin width, fin thickness,fin pitch,slit width and spanwise tube pitch have the same impact on Nu and Eu under two arrange- ments. Fin width has the most significant effect on Nu and fin pitch has the same effect on Eu. When it is in-line,slit width has the least effect on Nu and Eu. Longitudinal pitch has the same effect on Nu and Eu with staggered arrange- ment. Correlations of Nu and Eu for H-type finned tubes with two arrangements are presented. The research results can provide a reference for the optimization design of lower temperature economizer in the coal-fired power station.