• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.105-105
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• 2006

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.20 no.6
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• pp.379-390
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• 1991

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.18 no.3
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• pp.201-205
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• 1989

• Proceedings of the KIEE Conference
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• 1999.11c
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• pp.546-548
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• 1999

화력발전소 운전원 훈련용 시뮬레이터 개발시 제어 시스템을 구성하는 제어로직과 MMI(Man Machine Interface) 화면등의 모델 개발을 위해서는 많은 인력과 시간이 수반되는 일이지만 일일히 코딩을 하여만 실제 제어기능 및 화면기능을 구현할 수 있다. 하동화력발전소 운전원 훈련용 시뮬레이터에서는 제어시스템 개발의 생산성과 신뢰도를 향상시키기 위해 분산제어시스템 제어로직변환기를 개발하여 실제 발전소에서 사용중인 제어 로직파일을 제어 모델로 변환하여 시뮬레이터에 적용하는 방법을 이용하였다. 본 논문에서는 하동화력발전소의 분산제어시스템인 Simens Teleperm-ME에 적합한 제어 로직 변환기의 개발에 관하여 설명한다. 변환기를 통한 제어시스템의 모델링 방법은 첨단 제어 시스템의 기존 기능을 그대로 유지할 수가 있게 되어 제어기술자의 훈련 및 제어로직 개발 그리고 분석이 가능하며. 이를 통하여 운전원 훈련효과를 제고할 수 있고 실제 제어시스템과 완벽한 호환성을 유지함으로써 시뮬레이터의 정확성을 보증할 수 있게 된다.

• The Magazine for Energy Service Companies
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• s.13
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• pp.22-25
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• 2001

지하철이 ESCO사업을 통해 한층 쾌적하고 밝은 시설로 거듭났다. 서울지하철공사가 1, 2, 3, 4호선 115개 역사 가운데 74개역의 조명과 전동기 제어반을 고효율기기와 인버터제어방식으로 개체한 것. 지난해 12월부터 7월까지 약8개월에 걸쳐 $1\~4$호선의 안정기, 형광램프, 반사갓, 터널등기구를 에너지절약형 조명설비로 바꾸고 일반 On/Off제어방식이던 전동기 환기제어반을 절전형 인버터제어기로 교체했다. 지하철공사는 총141억2천9백만원이 투자된 이번 사업으로 인해 연간 약40억원에 해당하는 50,348Mwh의 전력소모를 줄일 수 있게 됐다.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.1141-1146
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• 1993

The problem of tension control in metal-strip processing line is discussed. A new mathematical dynamic model which relates tension change, motor-speed change and roll-gap change is developed. Through the computer simulation of this model, parameter sensitivity, the tension transfer phenominon, and static and dynamic characteristics of strip tension were studied. Guidelines are developed to help one selecting locations of the master-speed drive in multi-drive speed control for tension adjustment and reducing the effect of interaction between tension and roll gap control.

• Fire Science and Engineering
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• v.25 no.4
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• pp.42-47
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• 2011

This study carried out the design and analysis of complex damper as basis study for development of complex damper for ventilation and fire protection. This study established design and analysis theory of complex damper based on process, kinematics mechanism and mechanism modelling of complex damper. And this study established engineering data construction and a source technology that can design each element of complex damper through motion analysis simulation based on design and analysis theory. Therefore, it got result that can apply comprehensively in development of complex damper for ventilation and fire protection from this study. Also, it sees that can ready control means and technological countermeasure of smoke to developed of complex damper with this study.

• 연구논문집
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• s.28
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• pp.21-37
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• 1998

Atmospheric pressure in a tunnel rises in proportion to the square of train’s speed as it enters a tunnel. This pressure difference propagates into the train and cause aural discomfort to the passengers. In order to alleviate the aural discomfort of them. a new ventilation system has been designed and tested. This system controls the charged and discharged by flow rate by detecting the air pressure generated outside and inside of the train. Test to confirm the fundamental performance of the system was carried out. Consequently, this system was found to be able to alleviate the aural discomfort effectively. Application of the system to TGV-K running in the speed range of 350km/h is considered to have good propospect.

• Tunnel and Underground Space
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• v.22 no.3
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• pp.173-180
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• 2012

In this study, diagonal ventilation circuits that are advantageous in air flow direction control were studied. Based on the results of the study, it could be seen that air volumes in diagonal ventilation circuits could also be calculated using numerical formulas or programs if the air volumes and air flow directions to be infused into diagonal branches are determined in advance as with other serial/parallel circuits. To apply the results, design plans for high level radioactive waste repositories applied with diagonal ventilation circuits and parallel ventilation circuits. To compared the each design plans and obtain expected operation results, ventilation network simulations were conducted through the Ventsim program which is a ventilation networking program. Based on the results, in the case of diagonal repositories that was expected to cause great increases in resistance, fan pressure was 1570 pa, total flux was 84 $m^3/s$, fan efficiency was 76.4%, fan power consumption was 181.2 kW and annual fan operating costs were 178,710,838 and thus maximum around 8% differences were shown in pressure and flux values and a difference of around 1.5% was shown in terms of operating costs.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.40 no.3
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• pp.191-200
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• 2016

The ventilation effect of a ventilation system, which is classified as the forced ventilation and natural ventilation, is predominantly dependent on the combination of air supply and discharge. Perhaps the simplest ventilation is merely supplying the air as it is. However, to improve the indoor working environment during the summer, an air supply that is cooled to some extent has been widely adopted. Recently, a cooling method utilizing the vaporization of water was introduced. In this study, the performance of an evaporation-type air supply unit that was produced by Japan K-company and was installed in a shoe-manufacturing plant in Busan was investigated. The purpose of the experiment was to measure how much the supplied air could be cooled. From this experimental study, we confirmed that the evaporation-type air supply system is efficient, capable of improving the working environment during the summer while minimizing the energy cost.