(1. Test and Research Branch Road and Bridge, Sichuan Highway Planning, Survey, Design and Research Institute Co., Ltd.,
Chengdu 610041, Sichuan, China; 2. Research and Development Center of Transport Industry of Technology,
Materials and Equipment of Highway Construction and Maintenance, Sichuan Highway Planning, Survey, Design and
Research Institute Co., Ltd., Chengdu 610041, Sichuan, China; 3. Sichuan Engineering Laboratory of Pavement
Structural, Materials and Maintenance, Sichuan Highway Planning, Survey, Design and Research Institute Co., Ltd.,
Chengdu 610041, Sichuan, China; 4. Sichuan Jiagang Technology Co., Ltd., Chengdu 610000, Sichuan, China)
Abstract：Influencing factors on ice-melting of loop heat pipe (LHP) was tested and sensitivity coefficients of various factors were calculated based on indoor snowmelt pavement structure model. The influence factors included heating mode, fluid temperature, pipe diameter, pipe distance and heating power. The results show that: LHP has excellent heat transferring effect and the maximum warming rate of road surface can reach 8 ℃/h, while the influence scope is limited at horizontal direction. The heat is continously transported from LHP to road surface and inner pavement. The heat utilization rate of direct electric heating is higher, and the ice thickness only affects the melting time of ice and snow. Road surface is sensitive to heating power and spacing, and 4cm depth is sensitive to fluid temperature and pipe diameter. The heating power sensitivity is the strongest, and the fluid temperature sensitivity is the worst; the thicker the pipe diameter and the larger the spacing, the sensitivity increases.
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2020, Vol. 39 
