ABSTRACT

In water distribution networks, pressure-head at a demand node more than what is required to satisfy the demand is considered as surplus. But, it cannot be completely taken as surplus. Because excess pressure-head at a node is essential to compensate the head-losses in the off-taking links so as to maintain the pressure-head required at downstream nodes. Also, in the recent years, attention is given to avoid too much pressure-heads in order to reduce the damages and leakages in pipes. Thus, there is a need to compute the pressure-head of a node that neither creates pressure-deficit nor too surplus. Such a pressure-head is termed as desirable pressure-head in this paper and a new method to compute it is proposed. The proposed method computes the desirable pressure-head of nodes one-by-one without trial and error. It is easy to adopt and it can be even done for a part of a network.

摘要

在配水管网中，需求节点上的压头超过满足需求所需的压头被认为是过剩的。但是，不能完全将其视为盈余。因为节点处的多余压头对于补偿脱胶链节中的压头损失至关重要，因此可以维持下游节点所需的压头。而且，近年来，为了避免管道的损坏和泄漏，已经注意避免过多的压头。因此，需要计算既不产生压差也不会过剩的节点的压头。这种压头在本文中被称为理想压头，并提出了一种新的计算方法。所提出的方法无需反复试验就能一一计算节点的理想压头。