以列车集便器系统污物箱为研究对象,建立了污物箱的仿真模型,设置了模型中的主要参数并进行了稳态与瞬态热力学仿真。仿真结果表明:加热管的功率能满足设计的要求;加热管的热量主要是通过加强筋传至外箱;当温度传感器达到8℃停止工作时,污物箱中的部分污水温度低于0℃,且污水的温度场分布十分不均匀。 Taking the trash tank of the train collector system as the research object, a simulation model of the sewage tank was set up, the main parameters in the model were set, and the steady-state and transient thermodynamic simulations were carried out. The simulation results show that the power of the heating tube can meet the design requirements. The heat of the heating tube is mainly transmitted to the outer box through the stiffener. When the temperature sensor reaches 8 ℃ to stop working, the temperature of some sewage in the dirt box is lower than 0 ℃ , And the sewage temperature distribution is very uneven.