Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Sensitivity analysis of pump and tank sizes on water network operation and water age

송수펌프용량 및 배수지규모에 따른 송·배수시스템의 운영비용 및 체류시간 분석

  • Kim, Kangmin (Department of Civil Engineering, Kyung Hee University) ;
  • Choi, Jeongwook (Department of Civil Engineering, Kyung Hee University) ;
  • Jung, Donghwi (Research Center for Disaster Prevention Science and Technology, Korea University) ;
  • Kang, Doosun (Department of Civil Engineering, Kyung Hee University)
  • 김강민 (경희대학교 사회기반시스템공학과) ;
  • 최정욱 (경희대학교 사회기반시스템공학과) ;
  • 정동휘 (고려대학교 방재과학기술연구소) ;
  • 강두선 (경희대학교 사회기반시스템공학과)
  • Received : 2017.08.11
  • Accepted : 2017.10.13
  • Published : 2017.12.31
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Abstract

Recently, various studies have been conducted to optimize the pump operation scheduling and/or the pump/tank size minimizing the system cost of water distribution network. Prior to that, it is important to understand the sensitivity of pump/tank size on the system cost and overall water quality. Here, we have performed the sensitivity analysis to investigate the effect of pump/tank size on the economic cost (construction and operation) and water quality (water age). The analysis was applied on a real, large-scale water transmission network currently operating in South Korea. The results revealed that the pump/tank size has a strong influence on system construction/operation costs. Especially, the tank size has a significant effect on the system-wide water quality. In the case of applied networks, the operating cost decreases as the capacity of the facility increases, but the design cost increases. Using a sensitivity analysis, a suitable range of pump/tank size could be suggested to minimize costs and stabilize the water quality at the same time prior to a system design.

최근 송 배수시스템의 최적 펌프운영과 펌프 및 배수지의 적정용량 산정을 위한 다양한 연구가 진행되고 있다. 시설물의 적정 용량을 선정하기에 앞서 송수펌프 용량 및 배수지규모에 따른 시스템 비용(건설 및 운영비용) 과 시스템 내 수질 변화를 분석하는 과정이 필요하다. 본 연구에서는 민감도 분석을 통해 송수펌프 용량과 배수지의 크기가 실제 시스템의 건설 및 운영비용, 그리고 시스템 전반의 수질에 미치는 영향을 분석하였다. 국내 대규모 지방상수도 시스템을 대상으로 분석을 실시하여 시설물 규모가 비용 및 수질에 미치는 영향을 명확히 파악하였다. 적용 네트워크의 경우, 시설물의 용량이 증가할수록 운영비용은 감소하지만, 설계비용은 증가하는 것으로 나타났으며, 이를 통해 비용최소화와 수질안정화를 동시에 만족하는 시설물의 적정용량 범위를 파악할 수 있을 것으로 판단된다.

Keywords

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