분산형 상수관망 구축을 위한 인라인 급수탱크 위치 최적화

Providing customers with the desirable amount of water with sufficient pressure is the most critical issue in operating a water supply network. It is possible to secure the necessary amount of water for stable operation by taking water from a reservoir or a dam, whereas supplying water with sufficient pressure stably is determined by how they properly design and operate a water supply network. In cases of mountainous areas such as Korea or where customers are widely distributed, too much pressure head loss in conveying water makes it difficult to maintain the design pressure head at demand locations. Usually, the utility resolves this problem by introducing a booster pump to the system. Besides booster pumps, another alternative will be an elevated tank for the system. It is, however, important to determine the number and locations of elevated tanks for obtaining the maximum advantages by installing an elevated tank. In this study, we suggest a methodology for determining the number and locations of elevated tanks by the quantification of being pressure-stable. The advantage obtained by elevated tank combinations is quantified in terms of “the number of pressure-improved nodes” and “Index of pressure improvement”and the methodology is applied to a sample network to prove its applicability.