(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.
[1] LIU Zhichun, WANG Dongdong, JIANG Chi, et al. Experimental study on loop heat pipe with two-wick flat evaporator[J]. International Journal of Thermal Sciences, 2015, 94: 9-17.
[2] BOO J H, CHUNG W B. Experimental study on the thermal perfor-mance of a small-scale loop heat pipe with polypropylene wick[J]. Journal of Mechanical Science and Technology, 2005, 19(4): 1052-1061.
[3] GUO Yuandong, LIN Guiping, HE Jiang, et al. Experimental study on the supercritical startup and heat transport capability of a neon-charged cryogenic loop heat pipe[J]. Energy Conversion & Management, 2017, 134(15): 178-187.
[4] DYSON E, HASHEMI A, WONG H. High-power electronics heat rejection from aircraft skin[J]. Journal of Enhanced Heat Transfer, 1996, 3(3): 165-176.
[5] 莫冬传,邹冠生,潘亚宏,等.双通道平板环路热管实验研究[J].工程热物理学报,2013,34(11):2124-2127.
MO Dongchuan, ZOU Guansheng, PAN Yahong, et al. Experimental study of flat loop heat pipe with bi-transport loops[J]. Journal of Engineering Thermophysics, 2013, 34(11): 2124-2127.
[6] PEI Gang, FU Huide, TAO Zhang, et al. A numerical and experi-mental study on a heat pipe PV/T system[J]. Solar Energy, 2011, 85(5): 911-921.
[7] WU Shuangying, ZHANG Qiaoling, XIAO Lan, et al. A heat pipe photovoltaic/thermal (PV/T) hybrid system and its performance evaluation[J]. Energy and Buildings, 2011, 43(12): 3558-3567.
[8] ZHANG Xingxing, ZHAO Xudong, XU Jihua, et al. Characterization of a solar photovoltaic/loop-heat-pipe heat pump water heating system[J]. Applied Energy, 2013, 102(2): 1229-1245.
[9] 王燕俊,张小松.太阳能热泵热水系统特性研究及其进展[J].制冷与空调,2007,7(1):13-17.
WANG Yanjun, ZHANG Xiaosong.Characteristic research and development of solar assisted heat pump water heating system[J]. Refrigeration and Air-Conditioning, 2007, 7(1): 13-17.
[10] 裴刚.光伏-太阳能热泵系统及多功能热泵系统的综合性能研究[D].合肥:中国科学技术大学,2006.
PEI Gang.Study on Photovoltaic-Solar Assisted Heat Pump System and Multifunctional Domestic Heat Pump System[D]. Hefei: University of Science and Technology of China, 2006.
[11] HUANG B J, LEE J P, CHYNG J P. Heat-pipe enhanced solar-assisted heat pump water heater[J]. Solar Energy, 2004, 78(3): 375-381.
[12] 张倩雯,赵艳华,吴智敏.混凝土路面碳纤维发热线融雪化冰研究[J].公路交通科技,2015,32(2):41-48.
ZHANG Qianwen, ZHAO Yanhua, WU Zhimin.Deicing performance of carbon fiber heating wires embedded in concrete pavement[J]. Journal of Highway and Transportation Research and Development, 2015, 32(2): 41-48.
[13] 祁显宽,孙明清,李红,等.铺设碳纤维-玻璃纤维格栅的沥青混凝土路面融雪试验研究[J].武汉理工大学学报(交通科学与工程版),2014, 38(1):130-133.
QI Xiankuan, SUN Mingqing, LI Hong,et al. Experimental studies on the melting snow effect of asphalt concrete pavement reinforced with carbon fiber-glass fiber grating[J]. Journal of Wuhan University of Technology(Transportation Science & Engineering), 2014, 38(1): 130-133.
[14] 郑波,郑金龙,蔚艳庆,等.温泉热能消除高海拔地区道路积雪暗冰试验研究[J].重庆交通大学学报(自然科学版),2019,38(4):60-65.
ZHENG Bo, ZHENG Jinlong, WEI Yanqing, et al. Experimental study on elimination of snow cover and dark ice on highway pavement in high altitude region by thermal energy of hot spring[J]. Journal of Chongqing Jiaotong University(Natural Science), 2019, 38(4): 60-65.
[15] 艾长发,黄大强,高晓伟,等.高寒地区沥青路面温度行为数值分析[J].重庆交通大学学报(自然科学版),2017,36(2):24-31.
AI Changfa, HUANG Daqiang, GAO Xiaowei, et al. Numerical analysis of asphalt pavement structure temperature behavior in cold regions[J]. Journal of Chongqing Jiaotong University(Natural Science), 2017, 36(2): 24-31.