论文部分内容阅读
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。
Heat pipe heating deicing ice melting bridge for the protection of traffic safety is of great significance. According to the geographical and meteorological conditions of the Akaishi Bridge, a numerical model of the thermal melting process is established. The heat transfer process and the variation of deck temperature under three conditions of 100, 150 and 200mm heat pipe are studied. The results show that under the same operating conditions, the heat loss of the main bridge to the bottom can be neglected, while the heat loss of the approach bridge is larger. When the heat pipe is laid with 2mm thick insulation material, the heat loss of the lead bridge is reduced About 5%. From the heat transfer to the bridge deck, the ice melting capacity of 100mm ice melting system is much larger than that of 200mm ice melting system. When the ice melting load is 340.00 W / m2, when the outer surface of the heat pipe is working When the temperature is 25.00 ℃, the heat pipe ice melting system laid at a distance of 100mm can make the average temperature of the bridge deck be above 2.50 ℃, and the bridge deck temperature field is more uniform, which can effectively melt the ice.