• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.11a
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• pp.320-321
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• 2002

가상임펙터(virtual impactor)는 충돌판을 가지고 있는 관성임팩터(inertial impactor)와는 다르게 분리입경보다 큰 입자를 분리할 수 있는 부 유동과 분리입경보다 작은 입자를 분리할 수 있는 주 유동으로 나누어져서 입자의 튀김(bouncing)이나 재비산(reentrainment) 없이 입자를 분리 또는 농축할 수 있다. 하지만 관성임팩터처럼 여러 단을 연결하여 작은 입자를 분리할 수 없기 때문에 주로 큰 입자의 분리 및 농축에 쓰여왔다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2000.11a
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• pp.59-60
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• 2000

에어로졸을 분리할 수 있는 장비로는 전기적 이동차 분석기(differential mobility analyzer), 싸이클론(cyclone), 습식 충돌기(impinger), 습식 싸이클론(wet cyclone), 확산 배터리(diffusion battery), 관성 임팩터(inertial impactor), 그리고 가상 임팩터(virtual impactor) 등이 있다. 이중 가상 임팩터는 설계 및 제작이 비교적 간편하고, 입자를 분리 및 농축하는데도 좋은 성능을 나타냄으로 널리 사용되어져 왔다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1997.04a
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• pp.138-140
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• 1997

• Transactions of the Korean Society of Mechanical Engineers
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• v.15 no.1
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• pp.292-298
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• 1991

Previous studies on the performance of the round type impactor were reexamined and extended to the case of high particle mass loading. It was pointed out that the previous numerical studies need to be supplemented in the numerical process. The impactor performance was calculated under the same conditions as previous studies by the exact calculation process and it was found out that a tail of the collection efficiency curve, which have not been found in the previous studies, appeared in the results of ours. Numerical results for high particle mass loading show that the value of the collection efficiency in the impactor decreases but better particle-cut characteristics can be obtained, as the amount of the particle mass loading increases.

• The KSFM Journal of Fluid Machinery
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• v.19 no.6
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• pp.68-74
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• 2016

Hydraulic fracturing of wells during oil and gas (O&G) exploration consumes large volumes of fresh water and generates larger volumes of contaminated wastewater with high salinity. It is critical to treat and reuse the O&G wastewater in a cost-effective and environmentally sound manner for sustainable industrial development and for meeting stringent regulations. Recently, forward osmosis (FO) has been examined if it is a promising solution for treatment and desalination of complex industrial streams and especially fracturing flowback and produced waters. In the present study, the performances of a plate-and-frame FO membrane element and a module (6 elements combined in series) were investigated for concentrating high TDS wastewater. An FO module has achieved up to 64 % water recovery (i.e., concentration factor of 2.76) from 10,000 ppm wastewaters and can concentrate feed streams salinities to greater than 30,500 ppm.