FRNC 遇到的问题? beam length 是烟气平均辐射长度,对炉膛温度影响较大,当辐射炉膛被辐射炉管分割为两个以上的区域或分割成两个非对称的区域时,此值应手工计算输入。以下是计算方法: enter the value for the beam length to be used for calculating the flue gas emissivity. only for radiant and shock coils. a good value to use is c x volume/surface, where c = 3.52 for rectangular fireboxes and 3.6 for cylindrical fireboxes. volume and surface refer to the 6 faces enclosing the gas that radiates to the coil. the program will use the full firebox width or diameter for calculating beam length. however, if there is one or more double-fired ("center" type) coils, the program will use 1/2 of the width or diameter. if double-fired coils divide the firebox into more than 2 "cells" (or 2 non-identical cells), then input the manually-calculated beam length for each coil.查看更多