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防止表面凝露的圆筒面双层保冷层厚度计算

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Selected 保冷.
  • 保冷
  • 保冷
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 依据:GB/T 8175-2008
圆筒面双层保冷层厚度
名称 单位 公式/来源 值
1 输入
2  设备外径,Do m 1.52
3  管道/设备外表面温度,t ℃ -20
4  内层材料在使用温度下的热导率,λ1 W/m·K 0.03
5  内层外表面温度,t1 ℃ -5
6  外层材料在使用温度下的热导率,λ2 W/m·K 0.05
7  保冷层外表面与大气的换热系数,αs W/m²·K 8.14
8  环境温度,ta ℃ 20
9  环境露点温度,td ℃ 5
10 结果
11  保冷层外表面温度,ts ℃ ts=td+3 8
12  内层厚度,δ1 m / 0.004594326
13  内层外径,D1 m D1=Do+2δ1 1.529188652
14  外层厚度,δ2 m / 0.006585121
15  外层外径,D2 m D2=D1+2δ2 1.542358894
16  保冷层总厚度,δ m δ=δ1+δ2 0.011179447
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