Water supply/intake pumps operation use 70~80% of power costs in water treatment plants. In the water treatment plant, seasonal and hourly differential electricity rates are applied, so proper pump scheduling can yield power cost savings. Accordingly, the purpose of this study was to develop an optimal water supply pump scheduling scheme. An optimal operation method of water supply pumps by using genetic algorithm was developed. Also, a method to minimize power cost for water supply pump operation based on pump performance derived from the thermodynamic pump efficiency measurement method was proposed. Water level constraints to provide sufficient disinfection performance in a clearwell and reservoirs were calibrated. In addition, continuous operation time constraints were calibrated to prevent frequent pump switching. As a result of optimization, savings ratios during 7 days in winter and summer were 4.5% and 5.1%, respectively. In this study, the method for optimal water pump operation was developed to secure disinfection performance in the clearwell and to save power cost. It is expected that it will be used as a more advanced optimal water pump operation method through further studies such as water demand forecasting and efficiency according to pump combination.

ABSTRACT
 1. 서 론
 2. 연구대상지역 및 연구방법
  2.1 연구대상지역
  2.2 열역학적 펌프효율측정 방법
  2.3 CT값을 고려한 정수지 수위
  2.4 송수펌프 최적운영방법
 3. 연구결과
  3.1 열역학적 펌프효율측정 방법에 의한 펌프 성능
  3.2 CT값을 고려한 정수지 적정 수위 운영 범위
  3.3 송수펌프 최적운영
 4. 결 론
 References

• 형진석(서울시립대학교 환경공학과) | Jinseok Hyung (University of Seoul Environmental Engineering)
• 김기범(서울시립대학교 환경공학과) | Kibum Kim (University of Seoul Environmental Engineering)
• 서지원(서울시립대학교 환경공학과) | Jeewon Seo (University of Seoul Environmental Engineering)
• 김태현(서울시립대학교 환경공학과) | Taehyeon Kim (University of Seoul Environmental Engineering)
• 구자용(서울시립대학교 환경공학과) | Jayong Koo (University of Seoul Environmental Engineering) Corresponding author