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)
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)
- 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
- 导热系数小于0.25( )的材料称为保温、隔热材料。 A: ㎡·K/W B: W/(㎡·K) C: W( m·K) D: W/ ㎡
- 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
- 中国大学MOOC: 胶粉聚苯颗粒保温浆料保温层设计厚度不宜超过（）mm