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热力管道在输送加热的原油、蒸气、热水和其它热媒等介质的过程中,会产生大量的热损失。对热力管道保温可减少热损失。因此,保温是节约能源的一项有效措施。我国管道工程中常用的保温材料有矿渣棉、岩棉、玻璃棉、膨胀蛭石,珍珠岩和硬质聚胺酯泡沫塑料等制品。它们的干态性能在许多著作中都已作了论述和评价。本文通过保温材料湿态性能对比,探讨了不同保温材料一旦在受潮吸水情况下保温效果的差异性及其确保保温效果的根本措施。一、保温材料的湿态性能 (一)保温材料的吸水性管道工程常用保温材料的吸水性表达式为: q=(2π(t_0-t_r))/((1/λ)ln((d_1)/(d_0))+2/(αd_1))(千卡/米·时)
Heat pipes generate a large amount of heat loss during the transport of heated crude oil, steam, hot water, and other heat media. Thermal insulation of the heat pipe reduces heat loss. Therefore, insulation is an effective measure to save energy. The heat insulation materials commonly used in China’s pipeline engineering include slag wool, rock wool, glass wool, expanded vermiculite, perlite, and rigid polyurethane foam plastics. Their dry properties have been discussed and evaluated in many books. In this paper, through the comparison of the wet performance of thermal insulation materials, the differences in thermal insulation effect of different thermal insulation materials under moisture absorption and the fundamental measures to ensure the thermal insulation effect are discussed. First, the wet performance of insulation materials (a) of the water absorption of the insulation material The water absorption expression of commonly used insulation materials for pipeline engineering is: q=(2π(t_0-t_r))/((1/λ)ln((d_1) /(d_0))+2/(αd_1)) (kcal/m·hour)