• Proceedings of the SAREK Conference
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• 2008.11a
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• pp.463-468
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• 2008

The fact that the major cases of life casualties are from smoke in the fire accidents and the expected steep increase of skyscrapers, huge spaces, multiplexes and huge scaled underground spaces demand establishment of efficient smoke countermeasure. In pressure differential systems for smoke management, the speed of airflow through open door between accommodation and lobby should be maintained over 0.5m/s on the whole area of door to prevent smoke from infiltrate into evacuation root when the door is open for refuge. The numerical analysis on features of airflow through open door are carried out and the results are presented.

• Proceedings of the SAREK Conference
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• 2007.11a
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• pp.340-345
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• 2007

The underfloor air distribution system has been attracting to architects and building owners as one of valuable system for the renovated and newly office building. In this paper, we discussed the thermal stratification profile of pressurized plenum underfloor air distribution(UFAD) according to indoor setting temperature, diffuser number, diffuser type. For this, the space of office building(H corp.) is selected for measuring the air volume of underfloor diffuser and vertical temperature profile. As a result, the thermal stratification profile is influenced by the number and type of the underfloor diffuser and thermal storage character of the underfloor. Whereas indoor setting temperature have a lower significant impact on thermal stratification.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.16 no.7
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• pp.615-622
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• 2004

Recently, the hybrid system combining fuel cell and gas turbine has drawn much attention owing to its high efficiency and ultra low emission. It is now on the verge of world wide development and various system configurations have been proposed. A national project funded by Korean government has also been initiated to develop a pressurized hybrid system. This work aims at presenting design performance analysis for various possible system configurations as an initial step for the system development. Study focuses are given to major design options including the power ratio between gas turbine and fuel cell, reforming method (internal or external), reforming heat source (reforming burner, cathode hot air, fuel cell heat release) and steam supply method for reformer (anode gas recirculation, external steam generator). A wide variation in performance among different configurations has been predicted.

• Journal of the KSME
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• v.50 no.3
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• pp.28-31
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• 2010

이 글에서는 제4세대(Generation-IV) 원자로시스템의 자원활용 측면에서 핵연료 주기와 관련하여 새롭게 부각되고 있는 소듐냉각고속로(SFR: Sodium-cooled Fast Reactor)의 개발 목적 및 설계 특성을 기술하고 원자로 구조관점에서 가압경수로(PWR)와 비교 설명한다.

• The KSFM Journal of Fluid Machinery
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• v.7 no.2 s.23
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• pp.77-89
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• 2004

• The KSFM Journal of Fluid Machinery
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• v.7 no.2 s.23
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• pp.69-76
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• 2004

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 2001.11a
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• pp.273-278
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 2001.05a
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• pp.412.2-412
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• 2001

• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2001.11a
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• pp.184-193
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05a
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• pp.227-232
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• 1997

본 연구에서는 원자로의 충수 및 배기가 완료된 상태에서부터 원자로 출력 2%까지의 운전을 자동화한 원전 가열운전 자동화시스템을 개발하였다 본 시스템을 개발하기 위해 운전절차서와 운전원 업무경험을 바탕으로 운전모드, 자동화 범위, 자동제어대상 등을 선정하였고, 이를 기반으로 지능형 감독자시스템, 디지털 분산제어시스템, 그리고 신호연계시스템으로 구성된 가열운전 자동화시스템을 개발하였다. 개발된 시스템의 성능을 확인하기 위해 993 MWe급 가압경수로를 모의화한 계측제어 시험검증설비와 연계하여 검증 실험을 수행하였다.