• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.170-172
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• 2008

모바일 환경에서 풀브라우징과 접속/비접속의 seamless 한 인터넷 기능의 사용을 바라는 것은 사용자들의 오래되었으나 채워지지 않는 니즈였으며, 이제 사회적, 환경적 기반이 구축되고 있는 시점에서 실사용자들의 행태에 대한 리서치를 기반으로 인터넷 풀브라우징이 가능한 모바일 단말기가 갖추어야할 사용성의 요소를 미리 알아보고자 하였다. 하여 모바일 인터넷 이라는 주제로 이루어진 리서치의 일부로서 국내 사용자 조사를 진행하였다. 국내 사용자 조사는 휴대기기로 실제 모바일 인터넷 관련 기능을 자주 사용하는 실사용자 대상으로 FGD 와 Shadowing 을 실시하였고, 그 결과 PUI/UI/GUI 관점에서 향후 모바일 인터넷 휴대단말기가 갖추어야할 요소를 추출하였다.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.116.2-116
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• 2001

Korea Institute of Energy Research(KIER) has designed the 3MW pilot scale wet FGD process based on the experimental results of the bench scale FGD system which can treat 150 m3/hr of flue gases. The effects of process chemistry, packing material, and operating variables including L/G ratio, pH, scrubber pressure drop were investigated. In cooperation with Kyunggi Chemicals, the 3MW pilot scale plant was established on the industrial site at Onsan, Korea. This system has been operating since October 1999. This paper introduces an outline of the design features of the pilot plant and discusses its operational results.

• Proceedings of the KSME Conference
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• 2001.06a
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• pp.860-864
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• 2001

Today's industrialized plants are required to reduce SOx emitted from stacks at factories, utility power stations, etc. For this purpose, flue gas desulfurization (FGD) system is installed and gas-gas heater (GGH) is used to play a vital role to reheat the wet treated gas from FGD. The sector plates are located at cold and hot sides of gas gas heater. They serve as sealing to prevent mixing treated and untreated gases. Therefore, the deformation of the sector plate due to its dead weight and gas pressure should be considered as major factor for the sector plate design.

• Journal of the Korean Society of Combustion
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• v.22 no.4
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• pp.35-42
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• 2017

This case covers the issues related to the operation problem, cause analysis and improvement cases of the FGD that employed the non-leakage type GGH in coal-fired power plant for the first time in Korea. In the Cooler, there was a main problem that the tube is damaged by the ash cutting due to the high velocity of flue gas in the duct and by the weak wear resistance of material. In the Reheater, there was a main problem that the tube was corroded due to chlorine and sulfur in the circumstance of the low temperature. In order to solve those problems, we have improved the Reheater tube and tube fins by coating enamel to reduce corrosion rate.

• Proceedings of the KIEE Conference
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• 1998.07b
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• pp.825-827
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• 1998

Air pollution is one of the most important global issues of the environmental concerns. Some advanced foreign countries have developed the air pollution control technology. KEPCO has been researching on the air pollution control technology and developed the FGD(Flue Gas Desulfurization) system for 200MW thermal power plant. In this paper, we describe the major control loops implemented to the domestic FGD system. The major control loops are to be classified into booster fan control, absorber PH control and limestone density control. The control loops were applied to the actual desulfurization processes and proved to their performance.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.12 no.2
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• pp.120-130
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• 2000

A flow uniformity in a duct cooler of duct system of FGD(Flue Gas Desulfurization) linking a reheater and a absorber has been investigated in the present study. For this purpose, the flow characteristics according to the geometry of a vertical and horizontal vane in a curved duct of the duct system has been examined with the aid of a numerical simulation. The results indicate that the vertical vane with a little deflection toward a recirculation region makes the flow distribution in the duct cooler more uniform than that without deflection, and horizontal vane does not effect the change of the flow distribution for an angle of inclination. The mean flow uniform factor shows its maximum for duct system without the vane(case NP) and its minimum for the vertical vane with a little deflection(case P-0.8-0) .

• Corrosion Science and Technology
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• v.5 no.3
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• pp.106-111
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• 2006

Painting has protected metallic stack but the paint films may be degraded and corrosion problem can be arisen. To protect the painted metal stack, cathodic protection can be applied. If cathodic protection is applied to bare metal, only small area may be protected. However, if cathodic protection is applied to painted metal surface, large area can be protected and the lifetime of paint films can be extended. High corrosion resistant alloys were corroded at a Flue Gas Desulfurization (FGD) facility of power plant within a short period and thus cathodic protection can be used to protect these metals. On the base of computer simulation, if cathodic protection is applied to bare metal in a FGD environment, it was estimated that applied current could almost be spent to protect area near the anode. However, if cathodic protection is applied to high resistant-coated metal, the much larger area from the anode could be effectively protected.

• Journal of the Korean Society of Safety
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• v.12 no.2
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• pp.102-111
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• 1997

An In-line dry scrubbing FGD process was investigated. Calcium hydroxide was entrained in flue gas and the SO$_2$ removal efficiency by humidity and additives were examined. The range of reaction temperature was $200^{\circ}C$~$500^{\circ}C$ and the concentration of $SO_2$ was around 900ppm. By the increase of humidity in flue gas, the removal efficiency was increased. The effect of NaOH as a additive was very high and got high conversion of $Ca(OH)_2$, however in case of RH 90%, it was reverse. The effect of particle size and flow rate were examined. And the reaction rate constant and effective diffusivity also calculated.

• Magazine of RCR
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• v.4 no.4
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• pp.50-53
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• 2009

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2009.10a
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• pp.589-591
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• 2009