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一、通过车体隔热结构的进热量 1.决定车内微气候的进热量在没有制冷装置的客车内,当夏季运用时空气温度比外气温度高得多。过热是由于太阳对隔热结构的辐射作用和车内散热所造成的。只有在比较低的运行速度下,才允许用开窗通风的办法来降低车内空气的过热。当速度超过80～100公里/小时时不许打开车窗,因为这会造成车内空气不允许的流动速度(超过卫生标准)和落入车内大量灰尘。所以,在高速运行时,只能利用通风系统来进行换气。在苏联的某些地区,车辆在高速运行时也可不用制冷装置。在这些车中,采用减少进热量和增加通风系统送风量的办法只能有限地降低空气的过热。对运用在南部和中部地
First, through the car body insulation into the heat 1. Determine the car into the micro-calorie in the absence of refrigeration equipment in the bus, when the summer when the air temperature is much higher than the outside air temperature. Overheating is caused by the sun’s radiation effects on the insulation structure and heat dissipation in the car. Only at a relatively low operating speed is the window ventilation allowed to reduce overheating of the vehicle air. Do not open the window when the speed exceeds 80-100 km / h, as this can result in impermissible flow of air inside the car (above hygienic standards) and in large quantities of dust in the car. Therefore, at high speed, ventilation can only be used to ventilate. In some parts of the Soviet Union, vehicles can operate without cooling at high speeds. In these vehicles, the use of reduced heat input and increased ventilation in the ventilation system only limited the overheating of the air. For use in the southern and central regions