论文部分内容阅读
客车防寒层的合理厚度,应该从车壁的热工性能及其经济指标来确定。车壁的热工计算通常以夏季及冬季的气候条件为根据。由于夏季客车內外的溫差小,经过车壁传递的热量少,外气溫度波动经过牢体的衰減作用以后,在牢体內表面引起的波幅甚微,因此本文对夏季的工况不作分析。冬季客车內外溫差大,流过车壁的热量多,车内採暖设备发散热量不均勻时,造
The reasonable thickness of the bus cold layer should be determined from the thermal performance of the car wall and its economic indicators. Thermal calculation of the car wall is usually based on summer and winter climatic conditions. Due to the small temperature difference between the inside and outside of the passenger car in summer and the small amount of heat transmitted through the car wall, the fluctuation of the outside air temperature after the damping effect of the jelly body causes little fluctuation in the inner surface of the jail. Therefore, this article does not analyze the working condition in summer. Winter bus temperature difference between inside and outside large, the heat flow through the car wall, the car heating equipment radiating uneven heat, made