绝缘层的厚度：熔结环氧粉末Thickness of insulation: fused epoxy powder：0.3mm，导热系数heat conductivity coefficient：0.35-0.4W/(m·K)
A: 正确
B: 错误
A: 正确
B: 错误
举一反三
- 中国大学MOOC: 绝缘层的厚度：熔结环氧粉末Thickness of insulation: fused epoxy powder：0.3mm，导热系数heat conductivity coefficient：0.35-0.4W/(m·K)
- 硬质聚氨酯泡沫塑料（俗称黄夹克）保温层厚度一般Rigid polyurethane foam (commonly known as yellow jacket) insulation thickness is general：40mm，导热系数heat conductivity coefficient 0.04 W/(m·K) A: 正确 B: 错误
- 中国大学MOOC: 硬质聚氨酯泡沫塑料（俗称黄夹克）保温层厚度一般Rigid polyurethane foam (commonly known as yellow jacket) insulation thickness is general：40mm，导热系数heat conductivity coefficient 0.04 W/(m·K)
- 总传热系数一般考虑保温层和埋地管的放热系数即可The total heat transfer coefficient generally considers the heat transfer coefficient of the insulation layer and buried pipe A: 正确 B: 错误
- The thermal conductivity of the insulation material outside the tube is 0.08W/m.K. The convection heat transfer coefficient outside the tube is 8W/m2.K. What is the critical insulation diameter of the tube? A: 20m B: 2m C: 0.2m D: 0.02m