• Journal of the korean Society of Automotive Engineers
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• v.1 no.1
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• pp.21-24
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• 1979

오늘날 자동차배기의 대기오염공해는 큰 사회문제가 되었으며 선진제국은 이미 오래전부터 배 기정화를 시작하여 상당한 성과를 거두고 있으나 우리나라는 지금이 시작이 아닌가 생각된다. 배기정화는 자동차관계자가 해결해야 할 가장 큰 과제의 하나일 것이다. 자동차의 원동기로서 피스톤식 내연기관을 사용하는 한 최종적으로는 어떠하든 간에 배기처리를 할 필요가 있다. 따 라서 배기처리방법의 성공의 여부는 자동차용 내연기관의 운명이 걸려있다고도 할 수 있다. 이 러한 시점에 있어서 다른 사람 등이 해온 배기처리방법을 고찰해 보는 것도 결코 무의미한 것이 아니라 생각되기에 저자는 약 10년전에 발족한 일본자동차연구소 (JARI : JAPAN AUTOMOBILE RESEARCH INSTITUTE) 에서 시험제작을 하여 중점적으로 배기정화의 연 구를 해온 배기의 완전무해화장치 (JAPECS;JARI Perfect Emission Control System)를 소개하고 이것에 대한 고찰을 하고자 한다. JAPECS의 시험제작연구의 목적은 단지 자동차배기의 완전 무해화장치의 시험제작에 있는 것이 아니고 이 연구를 추진함으로써 1) 내연기관의 배기정화의 궁극적인 가능성을 추구할 수 있는 것과 2) 각 단계의 배기규제에 대처할 수 있는 가장 효과적이고 실용적인 배기처리장치의 개발을 위한 기술적인 검토가 될 수 있는 것으로 되어있다. 이 JAPECS project에서는 현재 사용되고 있는 모든 종류의 자동차엔진의 배기정화를 목표로 하고 있고 최초의 2년은 기초적인 검토에 중점을 두고 그후는 실용화에 중점을 두고 있다.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.6
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• pp.155-159
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• 2002

This paper describes the development process of mosquito trap with the effect of air cleaning by using the substance-field analysis and evolution pattern of systems in the theory of inventive problem solving (TRIZ). We g(It the concept of the mosquito trap with mosquito attractants instead of mosquito reluctants such as mosquito stick coil and skin medicine with bad and toxic smell. The number of mosquitos traped by one trap near cattle shed per one night in summer, was over 10 thousands with some effects of air cleaning

• The KSFM Journal of Fluid Machinery
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• v.6 no.2 s.19
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• pp.15-22
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• 2003

Comprehensive study on a centrifugal blower for air-purifier involving a few physical filters for percolation process has been accomplished for an optimal design of the air handling system. The filtering media causes a flow resistance for induced flows by a rotating impeller. The present methodology is to adopt PIV system for velocity measurements and wind tunnel connected with an anechoic chamber for total performance test of the blower. Trial prototypes for the blades of a rotor and casing are presented for satisfaction of both flow rate and noise level set by design objectives. Tapered blades with a special casing for a fan show good performance data. The results of velocity fields also explain the reason of improvements of the blower performance.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.10a
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• pp.556-559
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• 1997

This paper describes the development process of mosquito trap with the effect of air cleaning by using the substance-field analysis and evolution pattern of systems in the theory of inventive problem solving (TRIZ). By the concept of standard solution about introducing S3 substance, modification of S1 (human) and S2 (mosquito) between first substance SI and second substance S2 with harmful effect, we got the concept of the mosquito trap with mosquito attractants instead of mosquito reluctants such as mosquito stick coil and skin medicine w~th bad and toxic smell. The number of mosquitos traped by one trap near cattle shed per one n~ght in summer, was over 10 thousands with some effects of air cleaning.

• Proceedings of the KAIS Fall Conference
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• 2006.11a
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• pp.276-279
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• 2006

내부 순환형 회분식 반응기에서 UV/$TiO_2$ 시스템을 이용하여 기상의 아세톤과 알데히드류 유기화합물 분해 반응 특성을 온도와 농도 및 자외선 파장 및 광도에 대하여 고찰하였다. 또한 기존의 공기정화기에 장착할 수 있는 담체를 도출하고자 하였다. 새로운 광촉매 담지체로는 전처리 필터로 사용되는 메쉬망 형태를 사용하였으며, 광조사율이 높고 광촉매의담지량을 늘릴 수잇는 방안에 대한 연구를 수행하였다. 본 연구 결과 광접촉 면적 대비 높은 반으성을 나타내었으며 Pt, Pd 등의 첨가에 의한 반응성 상승이 나타났다. 메쉬망 형태의담지체 사용시 광조사면적 대비 담지량의증가에 의하여 온도에 의한 흡착특성에 따른 영향을 더 크게 받는 것으로 나타났다.

• Journal of the Korean Society for Aviation and Aeronautics
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• v.14 no.3
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• pp.51-59
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• 2006

The air purity-sterilizer was developed and the CFD and experimental studies were carried out in order to investigate the performance of a air purity-sterilizer. Overhaul and exchange efficiency were increased by the modularization of the air purity-sterilizer. The good performance was validated by the hot-wire measurements and flow simulations in the room. Mean velocities at the exit of the air purity-sterilizer were 0.91, 1.62, 1.99, and 6.14 m/sec according to the fan mode. And the flow visualization of pured air was shown by using CFD flow simulation in the room of 24, 50 pyeong. The results show that the air purity-sterilizer has a high performance enough to produce air purity-sterilizer on a commercial scale.

• Korean Journal of Environmental Agriculture
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• v.26 no.2
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• pp.107-115
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• 2007

Objective of this study was to assess the efficient rice cultivation practice to mitigate the non-point source pollutants loading to the adjacent watershed. Cultivation practices consisted of machine transplanting, direct seeding on dry paddy, and no tillage in which no fertilizer and pesticide were applied to paddy field. Water in drainage canal was used as irrigation source during the entire rice growing season. Loading of the non-point source pollutants to the adjacent small stream was mitigated by all treatments. Rice yield, total biomass (rice + weeds), and uptake T-N, $P_2O_5$, and $K_2O$ were higher in machine transplanting practice than those in direct seeding and no tillage practices. However, the purification effects of non-point source pollutants were followed in orders of no tillage > direct seeding > machine transplanting due to quantity of irrigation water. The annual purification quantity of T-N, T-P, and K by rice cultivations ranged from 46 to 369 kg $ha^{-1}$, 4.1 to 16.4 kg $ha^{-1}$, and 55 to 238 kg $ha^{-1}$, respectively, during the entire rice growing season. Results revealed that no tillage practice of rice cultivation was the best management option in reducing the loading of the non-point source pollutants from the drainage canal into stream.

• Journal of Korea Society of Industrial Information Systems
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• v.27 no.3
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• pp.21-28
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• 2022

Fine dust enters the lungs or blood vessels through the respiratory tract through the air. Recently, due to the fine dust problem, the demand for air purifiers in Korea is also increasing rapidly. Moss is the oldest terrestrial plant, and it is known that it has the property of adsorbing and decomposing heavy metals and fine dust. To compare the effect of reducing fine dust between moss and the existing chemical filter (Hepa), a cube of 1 m³ was manufactured and the amount of fine dust reduction under a controlled environment was compared. Under the fine dust conditions, an umbrella moss filter, rat tail moss filter, feather moss filter, and silk moss filter were inserted for a total of 40 experiments, 10 times each in 4 different situations. The difference between the amount after 30 minutes was statistically significant for all filters. However, as a result of the test, it was confirmed that there was no statistically significant difference between filters for fine dust, mixed gas, CO₂, and O₂. In particular, it was confirmed that the previously claimed effect of oxygen generation was almost nonexistent. Through this result, it was confirmed that the reduction of fine dust is effective regardless of the species view of moss, and it is expected to replace or supplement the chemical filter of the existing air purifier through future improvement.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2002.04a
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• pp.311-312
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• 2002

환경분야에서 광촉매는 주로 오염물질의 광분해처리에 이용되고 있는데, 기존에 사용되고 있는 광분해 방법은 광촉매 미립자를 수용액에 슬러리 형태로 분산시키거나 fixed bed, fluidized bed에 부착시킨 형태의 반응기들이다. 실험적 수준의 연구로부터 얻어진 여러 연구 결과에 의하면 슬러리 형태의 반응기가 고정화 촉매 반응기보다 효율이 더 높은 것으로 보고되고 있다. 그러나 엔지니어링 관점에서 슬러리형 반응기는 촉매의 재활용과 정화 처리 후 촉매입자를 유체로부터 분리해야하는 결점이 있다. (중략)

• Proceedings of the Korean Geotechical Society Conference
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• 1998.03a
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• pp.291-298
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• 1998