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城市泵站供水系统的工况是指泵站、输水干管、城市给水管网、水塔、水池联合工作时的系统工况。目前,系统工况的确定,一般是采用图解法,其优点是概念清楚、易于掌握。但是,图解法的缺点是误差较大、水泵厂提供的Q—H曲线的线粗,一般等于0.4～0.6毫米,而1毫米纵座标的H值等于1～5米或更多。在另一方面,图解法不能适应电算的要求。泵站供水系统是随机服务系统,所以,良好的工程设计只能为今后系统的优化运行提供条件,但
The operating conditions of the urban pumping station water supply system refer to the system working conditions when the pumping station, the water mains, the urban water supply pipe network, the water tower, and the pool work together. At present, the determination of system operating conditions is generally based on graphic methods. Its advantages are clear concepts and easy to grasp. However, the disadvantage of the graphical method is that the error is large, the line thickness of the Q-H curve provided by the water pump plant is generally equal to 0.4-0.6 mm, and the H value of 1 mm ordinate is equal to 1 to 5 meters or more. On the other hand, graphic methods cannot adapt to the requirements of the computer. The pump station water supply system is a stochastic service system. Therefore, a good engineering design can only provide conditions for the optimal operation of the system in the future, but