• 상하수도학회지
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• 제25권4호
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• pp.573-579
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• 2011

As rapid advances in technologies continue, seawater reverse osmosis (SWRO) desalination systems are now more energy-efficient than conventional thermal processes. Some SWRO desalination plants can achieve the specific energy consumption (SEC) below 2 kWh/$m^3$. Along with the development of new membranes and high-performance pumps, energy recovery devices (ERD), which recover the hydraulic energy of brine, have been developed to enhance energy efficiency. In this work, we reviewed general aspects of ERD technologies and their market trends. The advantages and disadvantages of various EDR technologies were compared to explore the future directions of ERD development.

• 상하수도학회지
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• 제32권1호
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• pp.1-10
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• 2018

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 $100m^3/day$ 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.

• 기계와재료
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• 제20권3호
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• pp.37-47
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• 2008

• Korean Chemical Engineering Research
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• 제55권6호
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• pp.762-766
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• 2017

에너지 회수장치는 역삼투 공정에서 에너지 소모량을 줄이기 위해 사용된다. 그러나 해수담수화 시장에서 소규모 에너지 회수장치(<$100m^3/d$)를 찾기는 쉽지 않다. 우리나라에서 음용수 생산을 위한 역삼투 해수담수화 시설은 대부분 도서지역이나 선박에서 소규모로 운영되고 있다. 즉, 국내에는 소규모 에너지 회수장치 수요가 잠재하고 있다. 본 연구에서는 고압펌프의 현실적인 효율과 국내 전력비 단가 등을 고려하여, 소규모 역삼투 공정의 에너지 소모량을 에너지 회수장치의 적용 여부 및 설치 장소(예: 육상, 도서, 선박)에 따라 비교 분석하였다. 분석 결과, 에너지 회수장치 적용 시 전력비는 1,914.1원/$m^3$ 까지 절감될 수 있고 소규모 시설과 선박에서는 절감효과가 증가되는 것을 확인하였다. 소규모 역삼투 담수화 시설이 대부분을 차지하는 국내 현실과 규모가 작아질수록 에너지 회수장치에 대한 전력비 절감효과가 커지는 본 연구의 결과를 고려한다면, 소규모 에너지 회수장치의 개발 필요성이 크다고 할 수 있다.