| [WRRF] RO설비용 에너지회수장치의 제품별 비교 및 평가가능한 툴 개발
WRRF(Water Reuse Research Foundation)는 자체 연구자금으로 RO시스템에 적용되는 ERD 설비를 평가할 수 있는 엔지니어링툴을 개발했다고 밝혔다. 이는 2013년 3월 14일 CH2M Hill사의 엔지니어에 의하여 웹캐스트를 통하여 발표될 예정이다.
기존 ERD장치는 SWRO적용에서 투자회수기간이 3년 정도이며 낮은 염분농도적용의 경우에 RO 농축수발생 에너지가 작아 ERD의 사용가치는 적은 편이다. 그러나 이번에 발표되는 도구를 사용하면 특정 현장조건에서 장치의 사용이 효과적인지 판단할 수 있으며 여러 제조사의 다양한 모델중에서 적절하고 경제적인 선정이 가능할 수 있게 되었다.
WRF-08-14에 규정된 ‘Selecting the Best Energy Recovery Device for Reverse Osmosis’에서는 또한 카다로그상의 스펙사양 비교 및 여러 다른 종류의 원수 성상에 따른 RO 시스템에서의 사용 사례를 볼 수 있다. 엑셀프로그램으로 지원되는 이번 엔지니어링 툴은 mass balance에 근거한 RO projection, 에너지회수율 계산, life-cycle cost 산정 등도 또한 가능하다.
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ERD comparison tool developed by WateReuse project
A tool to allow engineers to evaluate commercially available energy-recovery devices (ERDs) for reverse-osmosis (RO) systems has been developed under a research project funded by the WateReuse Research Foundation.
The tool will be demonstrated in a webcast to be presented by the CH2M Hill engineers who developed it on 14 March 2013.
ERDs at seawater RO plants can typically achieve a payback period of less than three years. However, for source waters of lower salinity, including brackish waters and wastewater effluents, the residual energy in the RO concentrate stream is significantly lower and the value of an ERD is consequently less.
At lower salinities, a case-by-case analysis must be performed to determine whether or not the use of an ERD is beneficial. Analysis must also be performed to determine which specific device is most beneficial, since multiple ERDs are available, each with different efficiencies and system costs.
In the foundation's study, Selecting the Best Energy Recovery Device for Reverse Osmosis Plants (WRF-08-14), conducted for the WateReuse Research Foundation, CH2M Hill performed a literature review of ERDs and their use in RO systems treating the full range of impaired water supplies: seawater, brackish groundwater, brackish surface water and wastewater.
Based on typical municipal requirements, the project developed an Excel-based model that integrates mass-balance based RO projection software, energy-recovery calculations and life-cycle cost estimates into a comprehensive, user-friendly tool. The tool permits utilities, engineers and plant operating staff to evaluate the applicability of a range of commercially available ERDs and to determine if one or more of these devices would be cost effective to incorporate into a new or existing RO facility.
The webcast will provide a technical overview of the five ERDs that were included in the tool and will offer a demonstration of the tool. The information presented will be useful to any utility that currently operates an RO plant not utilizing energy recovery or is considering implementing RO as a treatment process going forward.
The presenters will be Tyler Nading, a process engineer with four years of experience in water treatment with CH2M Hill, and Steve Alt, chemical engineer and membrane and desalination technologist in CH2M Hill's San Diego office.
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