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客车水暖系统的工作效率主要取决于系统中水的循环速度。运用经验表明,在装有上分式配管的采暖系统中,自然循环的速度最高。所以,虽然下分式配管采暖系统的重量比较小,而且观察和修理也比较方便,但目前已经完全停止使用。不过最近几年,东德和波兰的车辆制造厂建议采用下分式配管采暖系统的新方案。此外,目前使用的各种上分式配管系统的工作效率不同,这和它们的一些构造特性有关。所以就有必要制订出一种确定水循环速度的可靠试验方法和理论方法,用以评定现有的和确定未来的水暖系统的结构方案。
The efficiency of the bus plumbing system depends mainly on the water circulation rate in the system. Experience shows that in the heating system with the upper part of the pipeline, the natural cycle of the highest speed. Therefore, although the lower fractional pipe heating system weight is relatively small, and observation and repair is also more convenient, but has now completely stopped using. However, in recent years, the vehicle manufacturers in East Germany and Poland have proposed a new solution for the heating of a sub-divided piping system. In addition, the various upper fractional piping systems currently used have different working efficiencies, depending on some of their structural characteristics. Therefore, it is necessary to develop a reliable test method and theoretical method to determine the speed of water circulation to evaluate the existing and future structural solutions of the plumbing system.