• Journal of Energy Engineering
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• v.6 no.1
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• pp.41-51
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• 1997

A dynamic mathematical model of a thermal power plant with a single drum-type boiler is described with the base on modular concept. The present process model, which is including full scope of the components and high load changes, is based on physical approach through lumped parameters. The module, which means a component of the power plant and must essentially depict the characteristics of the component well, might be interconnected using pressure nodal method in a arrangement determined by users. With the results of the load changes of 75 MW to 95 MW and 95MW to 75 MW with the rate of 3 MW/min, the applicability of the process model is examined connecting to DCS(Dispersion Control System), which has a real running logic of 100 MW real power plant.

• Journal of Internet Computing and Services
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• v.11 no.4
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• pp.1-10
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• 2010

As recent fusion industry and ubiquitous technology have grown fast, network contents, which require high load, are provided in various infrastructures and facilities such as u-city and smart phones. Therefore, it is anticipated that the playback quality of multimedia compared to network loads degrades dramatically due to the drastic increment of real-time reference of conventional high load contents (eg. multimedia data). In this paper, we improved the method of the traffic assignment based on MPP which elevated the playback quality of multimedia by assigning discriminately the possible traffic of MMS with TP coefficients. When the TP coefficient which combines content preference with media preference was applied to a real-time traffic assignment scheduler, the simulation results showed that the multimedia playback stream was assigned within the possible traffic of a server. The real-time scheduling algorithm was improved by using the TP coefficient that combines the time-dependent image contents and the weighted value of media preference. It was observed from the experiment that the loss of the possible traffic decreases to 3.91% and 3.88% for three and four clients respectively.

• Journal of Energy Engineering
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• v.10 no.4
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• pp.379-386
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• 2001

This experimental study deals with on Nitric Oxide Formation & Reduction in Industrial Bunner. In this study, Laser-induced fluorescence (LIF) techniques have been used for quantitative measurements of Nitric Oxide. The NO A-X (0, 0) Vibrational band around 226 nm was excited using a XeCl excimer-pumped dye laser. And on-line excitation used $P_{21}+Q_1(14.5)/R_{12}+Q_2(20.5)/P_1(23.5)$ transition, for minimizing the other interferential effect. The measurements were taken NO concentration distribution in double swirling diffusion flame. In this swirl burner, NO concentration in downstream fo the flame decrease as primary/secondary air ratio increases.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2011.11a
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• pp.49-49
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• 2011

GNP 증가 등의 요인으로 생활수준이 향상되면서 사람들의 고급스럽고 아름다운 공간에 대한 선호도가 점점 증가하고 있으며 따라서 실내 인테리어 산업에 대한 관심이 높아지고 있다. 인테리어 산업에서 주로 사용되는 무늬목은 나무 모양이 나게 무늬를 새겨 넣어, 외양을 장식하는 얇은 합판으로 나무의 고급스러움과 아름다움으로 인해 고부가가치 상품으로 자리잡고 있으며 주로 실내인테리어장식 및 가구, 마루바닥, 건축내장재, 제재목 등의 건축 자제의 용도로 사용되고 있다. 또한 천연목재를 이용한 다양한 가공법으로 아름다운 무늬의 재현 등을 실제 이루고 있으며, 천연 목재의 색감 외 표백/염색/가공을 통한 염색무늬목 제조도 이루어지고 있는 실정이다. 무늬목 염색가공에 대한 기술이 보편화되지 않은 실정에서 고부가가치형 기술로 자리 매김 하기 위해서는 제조공정 시 보다 안정적인 작업성과 최소한의 작업 변수를 확보하는 것이 무엇보다도 중요하다. 이에 본 연구에서는 고부가가치형 무늬목의 생산성을 향상하고, 불량률의 최소화를 궁극적 목적으로 하며, 실제 침염목의 건조공정 중 최적의 함수율을 확보할 수 있는 예비건조 시스템을 개발 적용하여 시간과 에너지 절감 효과를 확보하였다. 생산 중 최대의 불량현상으로 갈라짐(건조로 발생한 응력에 의해 목리방향으로 갈라지는현상:checks)과 건조공정의 지연으로 발생하는 부패현상도 개선하였다.

• Applied Chemistry for Engineering
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• v.24 no.1
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• pp.10-17
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• 2013

Heavy oil residue upgrading process was being used in conventional refinery process. Recently, as the importance of non conventional energy development is growing up, the commercial projects of heavy oil upgrading are getting more active than before. For having competitive business model in the resource competition, non conventional energy development should be considered as an important business strategy. In developing oil sands, extra heavy oil, and shale gas, canadian oil sands and extra heavy oil have great importance in substitution of conventional oil consumption. In oil sands development, the bitumen, which is extracted from oil sands, has great value after upgrading or refining process. Similar process is being used current conventional refinery process. The bitumen is highly viscous hydrocarbon. This bitumen includes impurities which can not be treated in conventional refinery process. As this reason, specified process is needed in bitumen or extra heavy oil upgrading process. Moreover, there will be additional specified facilities in the process of production, transportation and marketing. In oil sands, there are various kinds of commercial upgrading process. Extraction, dilution, coking and cracking method were being used commercially.

• The Science & Technology
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• no.6 s.409
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• pp.26-29
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• 2003

• The Monthly Technology and Standards
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• s.115
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• pp.30-33
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• 2011

• Proceedings of the KHMA Conference
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• 2012.05a
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• pp.362-362
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• 2012

• The Monthly Technology and Standards
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• s.114
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• pp.34-37
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• 2011

• Proceedings of the Costume Culture Conference
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• 2000.09b
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• pp.49-50
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• 2000