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众所周知,对于特定种类的燃气,由其灶具的工作稳定性条件所决定的低压管网系统的允许压力降为定值,并按一定比例关系分配到低压管网系统的干管和庭院管道这两部分内。从经济角度讲,不同结构的管网系统的允许压力降分配比例不尽相同,而是存在一个与各管网系统特性相对应的最佳分配比例,使该管网系统在满足技术要求的前提下达到最佳经济效果。本文从管网各部分的造价分析出发,利用数学上求极值的方法推导出一个具有一定实用价值的低压管网允许压力降最佳分配比数学计算公式。
As is known to all, for certain types of gas, the allowable pressure drop of the low-pressure pipe network system determined by the working stability conditions of the cooking appliances is set to a fixed value, and is distributed to the dry pipe and the courtyard pipe of the low-pressure pipe network system according to a certain ratio. Part inside. From an economic point of view, the distribution ratio of allowable pressure drop for different structures of the pipe network system is not the same, but there is an optimal distribution ratio corresponding to the characteristics of each pipe network system, so that the pipe network system meets the technical requirements. Under the best economic results. In this paper, starting from the analysis of the cost of each part of the pipeline network, using a method of mathematically seeking an extreme value, a low-pressure pipe network with a certain practical value is allowed to allow the best allocation of pressure drop ratios to mathematical calculation formulas.