桥梁热力管防冻融冰系统的数值模拟  

Numerical simulation of heat pipe deicing system on bridge

作　　者：张登春[1] 章照宏[2] 袁铜森[3] 陈亚洲[1] 邹声华[1] 李孔清[1] 

机构地区：[1]湖南科技大学能源与安全工程学院,湖南湘潭411201 [2]湖南省高速公路管理局,湖南长沙410016 [3]湖南省交通科学研究院,湖南长沙410015

出　　处：《热科学与技术》2016年第3期204-210,共7页Journal of Thermal Science and Technology

基　　金：国家自然科学基金资助项目(51134005;51274098);湖南省自然科学基金资助项目(2016JJ2054);湖南省交通运输厅科技进步与创新资助项目(201413)

摘　　要：热力管加热桥面融雪化冰对于保障交通安全具有重要意义。针对赤石大桥的地理环境和气象条件,建立了其热力融冰过程的数值模型,研究了热力管间距为100、150和200mm三种情况下融冰系统的热量传递过程和桥面温度变化规律。结果表明:在相同工况条件下,主桥向底面传递的热损失基本可以忽略,而引桥的热损失较大;在热力管层铺设2mm厚度的隔热材料,引桥向下传递的热量损失减少5%左右;从向桥面传递的热量来看,100mm间距融冰系统的融冰能力要远大于200mm间距融冰系统;在340.00 W/m2的融冰负荷情况下,当热力管外表面工作温度为25.00℃时,100mm间距敷设的热力管融冰系统,能使桥面平均温度在2.50℃以上,并且桥面温度场较为均匀,能有效融冰。Using heat pipe to melt snow and ice is of great significance to ensuring traffic safety. According to the geographical environment and meteorological conditions of Chishi Bridge, the numerical model of thermodynamic process of melting ice was established. The heat pipe melting ice system＇s heat transfer process and temperature changes of the pavement were studied when the distances of the pipes were 100 mm, 150 mm, 200 mm respectively. The results show that the main bridge＇s heat loss could be ignored while the approach＇s heat loss is large under the same condition. After adding 2 mm thickness of insulation layer, the downside transmit of the approach＇s heat loss is decreased by 5%. As of the heat transform to the pavement, the capacity of 100mm spacing＇s melting ice system is greater than that of 200 mm spacing＇s. The results also show that when the external surface temperature of heat pipe is about 25 ℃ with the 100mm spacing, and the power of external melting ice is 340.00 W/m^2 , the bridge＇s surface temperature is above 2.50℃and the pavement＇s temperature field is relatively uniform, which can meet ice melting standards effectively.

关 键 词：热力管 桥梁路面 防冻融冰 数值模拟 

分 类 号：U216.412[交通运输工程—道路与铁道工程]