• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1997년도 추계학술대회 학술발표 논문집
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• pp.259-262
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• 1997

In this paper, a fuzzy model based on the polynomial Neural Network(PNN) structure is proposed to estimate the emission pattern for air pollutant in power plants. The new algorithm uses PNN algorithm based on Group Method of Data Handling (GMDH) algorithm and fuzzy reasoning in order to identify the premise structure and parameter of fuzzy implications rules, and the least square method in order to identify the optimal consequence parameters. Both time series data for the gas furnace and data for the NOx emission process of gas turbine power plants are used for the purpose of evaluating the performance of the fuzzy model. The simulation results show that the proposed technique can produce the optimal fuzzy model with higher accuracy anhd feasibility than other works achieved previously.

• 한국기계가공학회지
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• 제10권5호
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• pp.125-130
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• 2011

The characteristics of unsteady combustion were experimentally investigated using confined premixed flames stabilized by a rearward-facing step. The unsteady combustion used in this experiment plays an important role in controlling self-excited combustion oscillations and it has usually desirable performance such as high load combustion and low pollutant emission. It is known that combustion oscillation is occurred if Rayleigh's criterion is satisfied. The pressure fluctuation and OH-emission fluctuation were measured using pressure transducer and OH optical fiber respectively and then cross-corelation and phase difference were calculated to apply Rayleigh's criterion.

• 한국대기환경학회지
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• 제20권6호
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• pp.729-738
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• 2004

Seasonal variation of major inorganic ions in the greater Seoul area was estimated using a photochemical box model and a gas/aerosol equilibrium model with emphasis on semi -volatile nitrate. Pollutant emission was determined by season by comparing the predicted concentration with the measurement one obtained for a year from the late 1996. The results showed that particulate nitrate was the highest in summer but about 40% of total nitrate was present in the gas phase. This was due to volatilization at high temperature since ammonia was sufficient to neutralize all nitrate regardless of season. As relative humidity in summer was higher than the deliquescence point, particulate ion concentration with water was two times higher than that in other season. So called ‘NOx disbenefit’ indicating increase in particulate ion concentration with decrease in NOx emission was evident especially in winter.

• 공업화학
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• 제3권2호
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• pp.207-212
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• 1992

Main disposal technology for industrial wasites in Korea has been landfilling, however, this is encountering serious problems such as the lack of landfill sites and objections of residents. Incineration, therefore, has become a final solution for this dilema. Various kinds of air pollutants generation are possible because of the variety of types and compositions of wastes generated in industry. In this paper, air pollutants produced while incinerating hazardous industrial wastes are discussed and some control technologies are surveryed with the purpose of optimal design of incinerators and emission reduction. From this initial stage of incinerator utilization, low-emission type should be developed and applied and intensive research on pollutant generation due to waste incineration and advanced control technologies should be also performed.

• 한국에너지공학회:학술대회논문집
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• 한국에너지공학회 2000년도 춘계 학술발표회 논문집
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• pp.201-207
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• 2000

This study was carried out to optimize burner and heat exchanger of the condensing gas boiler which can save energy by utilizing latent heat of combustion gas and reduce pollutant in exhaust gas. The heat exchanger of the gas boiler was composed of three parts, which were an upper. lower , and coil heat exchanger . The upper heat exchanger was placed outside of the premixed burner and a lower heat exchanger was located under the upper heat exchanger. And, coil heat exchanger rounded the outer surface of an upper and lower heat exchanger. The boiler designed by this research reaches turn-down ratio 4 : 1 in the domain of equivalence ratio 0.75-0.8 and thermal efficiency of 97% . Emission of NOx and CO concentration was under 20ppm and 140ppm at equivalence ratio 0.8 . When diameter of the burner replace 60mm by 50mm. emission of CO was reduced about 50ppm remarkably.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 동계학술발표대회 논문집
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• pp.71-74
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• 2008

This paper aims at studying the key design elements for the optimal ventilation system design, developing the design models and suggesting the design guidelines. The key elements include the basic exhaust emission rate, wall friction coefficient, vehicle drag coefficient and slip streaming effect, jet fan operating efficiency, natural ventilation force and installation scheme for jet fans and ventilation monitors in tunnel. The design models developed in this study are one-dimensional ventilation simulator to analyze the air flow, pressure profile and pollutant dispersion inside and outside tunnel, expert model to choose the optimal ventilation method, and the ventilation characteristic chart to evaluate the preliminary ventilation system. The study results are reflected in the design guideline for road tunnel ventilation system.

• 한국자동차공학회논문집
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• 제7권7호
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• pp.94-103
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• 1999

A model for the prediction of combustion and exhaust emissions of DI diesel engine has been formulated and developed . This model is a quasi-dimensional phenomenological one and is based on multi-zone combustion modelling concept. It takes into consideration, on a zonal basis ,detailed of fuel spray formation, droplet evaporation, air-fuel mixing, spray wall interaction, swirl , heat transfer, self ignition and burning rate . The emission model is considered with chemical equipment , as well as the kinetics of fuel. NO and soot reactions in order to calculate the pollutant concentrations within each zone and the whole of cylinder . The accuracy of prediction versus experimental data and the capability of the model in predicting engine heat release, cylinder pressure and all the major exhaust emissions on zonal and cumulative basis., is demonstrated. Detailed prediction results showing the sensitivity of the model bv various injection rates are presented and discussed.

• 환경영향평가
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• 제28권2호
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• pp.141-151
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• 2019

우리나라는 2015년 환경오염시설의 통합관리에 관한 법률을 통과시켜서 BAT 기준서에 의한 통합환경관리가 실시중이다. 통합환경관리의 성격을 요약하면 다오염물질 배출원에 대한 관리의 통합화와 BAT 로 대변되는 기술적 기준에 의한 규제이다. 일반적으로 경제학에서는 기술기준에 의한 규제는 정태적 동태적 비효율성을 가져오는 것으로서 회피하여야 할 정책수단으로 알려져 있다. 통합환경관리제도는 BAT규제를 바탕으로 운용되는데 이에 대한 경제적 효율성 역시 심각한 의문의 대상이 될 수 있다. 본 논문은 BAT 기준의 효율성을 경제학적 관점에서 평가하고자 시도한다. 간단한 다오염물질 모형을 통하여 BAT 규제의 경제적 효율성을 분석하여 본 결과 단일오염물질상황에서도 정보의 불완전성으로 인하여 약하게 존재하던 환경세의 BAT 대비 비효율성이 다오염물질 상황하에서는 더욱 커짐을 보여주었다. 다오염물질관리체계로서 IPPC와 BAT가 한 묶음으로 추진되고 실행되어온 이유가 이러한 사실에 의하여 부분적으로 설명된다. EU에서 석탄 상대가격의 하락으로 대기오염물질의 배출 증대가 우려되는 상황에서 BAT 기준의 강화로 대처한 것이 가격구조와 실효적 환경세의 변동으로 인한 환경적 후생손실을 BAT 규제 등으로 대처한 사례 중의 하나로 볼 수 있다.

• 한국대기환경학회지
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• 제26권1호
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• pp.69-76
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• 2010

While increased use of motor cycles in the recent years for various demands could worsen air quality, only few studies have been conducted on estimation of emission factors and characterization of emissions from motorcycle. In this study, emissions from selected six models of motorcycle based on largest market share and production rate were investigated. To investigate gaseous and carbonaceous air pollutants, such as carbon monoxide (CO), total hydrocarbon (THC), nitrogen oxide ($NO_x$), elemental carbon (EC) and organic carbon (OC), total 124 motorcycles between 2003 and 2007 model year were tested with regulatory driving conditions, such as CVS-40 and CVS-47 mode. These motorcycles were further sub-categorized based on their displacement (< 50 cc, 50~150 cc, and $\geq$ 150 cc), type of stroke (2- and 4 strokes) and model year (2003~2005 and 2006~2007). Tested motorcycles with recent model year (2006~2007) exhibited less emissions of regulatory gaseous and carbonaceous air pollutants compared to old model year (2003~2005). Chemical analysis showed that CO present in highest concentration followed by THC and $NO_x$ for all tested motorcycles. Interestingly, two strokes motorcycle produced higher THC emission but less CO and $NO_x$ than those of four strokes. For all types of displacement and stroke, emission factors (gram per kilometer) of THC and CO except $NO_x$ with recent model year (2006~2007) showed decreased trend compared to old model year (2003~2005). In addition to this, due to mixed combustion between gasoline fuel and lubricant, two strokes motorcycle showed OC > EC emission trend.

• Journal of Advanced Marine Engineering and Technology
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• 제38권3호
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• pp.240-245
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• 2014

환경오염에 대한 심각성이 대두되면서 선박부문의 온실가스 배출에 관한 연구가 전 세계적으로 활발하게 진행되고 있다. 이에 반하여 국내는 아직 기초 연구수준에 그치고 있다. 본 연구에는 실습선 한바다호를 이용하여 운항 중 발생하는 온실가스를 정량적으로 조사하였고, 연료소모량과 육상전기 사용량을 바탕으로 실습선이 배출하는 온실가스를 산정하였다. 2012년 1년 동안의 실제 운항데이터에서 연료소모량과 육상전기 사용량을 기본으로 Tier 1 방법을 이용하여 온실가스를 산정하였다. 이를 통하여 선박 총톤수 1톤을 운항 유지하는데 배출되는 배출 가스량과 실습생 1명을 1년 실습시키는데 발생하는 가스량을 분석하였다. 향후 선박에서 발생하는 오염물질의 인벤토리를 지속적으로 관리하여 강화되고 있는 국제 규제에 대비해야 할 것으로 사료된다.