摘要
为了保证管廊供热管道的热损失不大于直埋敷设的预制保温管,提出了相当保温层厚度的概念。通过对不同保温材料及其厚度的计算与分析得出:管廊供热管道采用导热系数不大于阻燃型硬质聚氨酯的保温材料时,保温层经济厚度下的热损失大于相当保温层厚度下的热损失;对于导热系数大于阻燃型硬质聚氨酯的保温材料,采用经济厚度是适宜的;阻燃型硬质聚氨酯外护镀锌铁皮适宜作为管廊供热管道的保温材料。
For ensuring the heat loss of heating pipeline in utility tunnel less than the prefabricated directly buried insulating pipeline, proposes a concept of equivalent thickness of insulation layer. Through the calculation and analysis of different thermal insulation materials and their thicknesses, concludes that when the heating pipeline adopts the thermal insulation material with the heat conduction coefficient not greater than that of the flame retardant rigid polyurethane, the heat loss at the economic insulation thickness is greater than that at the equivalent insulation thickness. Whereas when the heat conduction coefficient of insulation material is greater than that of the flame retardant rigid polyurethane, the calculation method of economic insulation thickness is suitable. The flame-retardant rigid polyurethane outer galvanized iron sheet is suitable as insulation material for heatin~ pipeline in utility tunnel.
作者
王振华
王飞
雷勇刚
Wong Zhenhua;Wang Fei;Lei Yonggang(Taiyuan University of Technology,Taiyuan,China)
出处
《暖通空调》
2018年第9期24-30,共7页
Heating Ventilating & Air Conditioning
基金
住房和城乡建设部科学技术计划项目(编号:2016-K4-079)
关键词
综合管廊
供热管道
经济厚度
相当保温层厚度
保温材料
导热系数
utility tunnel
heating pipeline
economic insulation thickness
equivalent thickness ofinsulation layer
thermal insulation material
heat conduction coefficient
