Recently, interest in the development of alternative water resources has been increasing rapidly due to environmental pollution and depletion of water resources. In particular, seawater desalination has been attracting the most attention as alternative water resources. As seawater desalination consumes a large amount of energy due to high operating pressure, many researches have been conducted to improve energy efficiency such as energy recovery device (ERD). Consequently, this study aims to compare the energy efficiency of RO process according to ERD of isobaric type which is applied in scientific control pilot plant process of each 100 m3/day scale based on actual RO product water. As a result, it was confirmed that efficiency, mixing rate, and permeate conductivity were different depending on the size of the apparatus even though the same principle of the ERD was applied. It is believed that this is caused by the difference in cross-sectional area of the contacted portion for pressure transfer inside the ERD. Therefore, further study is needed to confirm the optimum conditions what is applicable to the actual process considering the correlation with other factors as well as the factors obtained from the previous experiments.

ABSTRACT
 1. 서 론
 2. 실험장치 및 방법
  2.1 역삼투막 사양
  2.2 역삼투막 해수담수화 pilot plant 구성
  2.3 해수 취수 방식 및 원수성상
  2.4 에너지 회수장치
  2.5 실험 방법
  2.6 혼합율(mixing rate) 분석
 3. 결과 및 고찰
  3.1 Pilot plant 실험
 4. 결 론
 사 사
 References

• 김푸름(성균관대학교 수자원전문대학원) | Pooreum Kim
• 김형수(성균관대학교 수자원전문대학원)
• 박준영(성균관대학교 건설환경연구소) | Junyoung Park
• 김태우(성균관대학교 건설환경시스템공학과) | Taewoo Kim
• 김민진(성균관대학교 수자원전문대학원) | Minjin Kim
• 박기태(성균관대학교 수자원전문대학원) | Kitae Park
• 김지훈(성균관대학교 수자원전문대학원) | Jihoon Kim Corresponding author