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一、引言 一个现代化的城市,必然有一个庞大的自来水和煤管网输配系统,生产厂通过管网输配系统将自来水和煤气源源不断地输送到各用户。自来水和煤气不但为各行各业生产上所需要,也是千家万户生活的必需品,因此保证水和煤气的安全供应便成为至关重要的问题。 水和煤气的供应特点:第一,供应量大而面广;第二,季节高峰突出,如水在夏季的供应量远远超过其冬季的供应量,而煤气的供应高峰却在冬季;第三,消费的时不均匀性,即每小时的消费量都存在着不同程度
I. INTRODUCTION In a modern city, there will inevitably be a huge distribution system for tap water and coal pipe networks. The production plant will send tap water and gas to customers on a continuous basis through the pipe network transmission and distribution system. Tap water and gas are not only necessary for the production of various industries, but also essential for the living of millions of households. Therefore, ensuring the safe supply of water and gas has become a crucial issue. Water and gas supply characteristics: First, the supply is large and wide; Second, the peak of the season is prominent. If the supply of water in the summer far exceeds its winter supply, the peak supply of gas is in the winter; , the unevenness of consumption, that is, the degree of consumption per hour, exists to varying degrees.