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针对含内热源的埋地管道,建立了管道与周围土壤之间的传热模型。模型考虑了地表温度随季节变化,采用数值计算方法编制程序进行计算,得出管道温度随年代的变化规律。根据实际模型,建立缩小的相似性实验台进行验证,结果表明数值计算具有很好的准确性。最后,利用本模型预测了电力隧道在无通风条件下连续运行50a内的温度变化情况。
For the buried pipeline with internal heat source, a heat transfer model between the pipeline and the surrounding soil is established. The model takes into account the change of surface temperature with the seasons. The numerical calculation method is used to calculate the program and the variation rule of pipe temperature with age is obtained. According to the actual model, a reduced similarity test bench was established to verify that the numerical calculation has good accuracy. Finally, this model is used to predict the temperature change of the power tunnel during continuous operation for 50 years without ventilation.