빌딩자동제어를 위한 개방 제어네트워크와 빌딩관리시스템의 구현

홍원표 한국조명전기설비학회 2003 조명.전기설비 Vol.17 No.1

성토하부 연약지반의 측방유동 평가

홍원표,이광우,조삼덕,이재호 한국지반공학회 2006 한국지반공학회논문집 Vol.22 No.10

The lateral soil movement in soft grounds undergoing improvement with application of vertical drains is analyzed on the basis of monitoring data at three fields, in which fifty six monitoring sites are located. Based on the investigations, the criterions are suggested to predict the lateral soil movement. In order to predict the lateral soil movement in the improved soft grounds by using the dimensionless parameter R suggested by Marche & Chapuis (1974), it is desirable that the maximum lateral displacement in the soft ground below the toe of embankment should be applied to calculate R instead of the lateral displacement at the toe of embankment. The lateral soil movement may increase rapidly, if the safety factor of slope is less than 1.4 in case of high ratio of H/B (Thickness of soft ground/Embankment width) such as 1.15 or is less than 1.2 in case of low ratio of H/B such as 0.05. Also, the graph suggested by Tschebotarioff (1973), which illustrates the relationship between the maximum height of embankments and the undrained shear strength of soft grounds, can be applied to the evaluation for the possibility of the lateral soil movement due to embankments on soft grounds.

Web을 활용한 원격제어ㆍ감시 및 원격검침 LonWorks 시스템 구축에 관한 연구

홍원표 大田産業大學校 2000 한밭대학교 논문집 Vol.17 No.1

This paper proposes the new concept & design method and implementation of LonWorks network system for remote monitoring & control and telemetry using Web network. LonWorks network system for telemetry & remote monitoring and control is designed and fabricated. As a result, it is verified that LonWorks is open, interoperable, reliable network system from the experimental results, especially, it seamlessly links the data and control networks, allowing the IP network to be treated as an extension of the LonWorks networks, and vice versa.

Comparative study on the effect of cooling & heating loads by lighting energy of various light sources in an office building

홍원표 한국조명.전기설비학회 2016 조명·전기설비학회논문지 Vol.30 No.3

The objective of the work was to evaluate the impact of lighting energy to cooling and heating consumption in medium scale office building, when currently installed fluorescent lights were replaced with various LED lighting fixtures. This evaluation comes from an integrated approach combining the proper indoor lighting environment and the thermal aspects of cooling & heating consumption in office building. These simulations were performed by coupling an appropriate luminaire analysis for energy consumption and a dynamic thermal simulation software (TRNSYS). To analyze comparative study of effects on the heating, cooling loads, and energy consumption of an LED lamp application, 2 types of LED lamp with low light power watt(LPW) 24W and high LPW 7.5W and a fluorescent lights(FL) with 37W are used respectively. Integrated building energy consumption decreased up to 3.2% when fluorescent lamps were replaced with LEDs. Thus, the high LPW of LED(7.5W) replaced with the same number of FL shows an effective energy saving and cost- effective luminary.

설비적인 관점에서 본 인텔리전트 빌딩의 화재위험과 방재계획

홍원표 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.1

This paper presents the essential points of fire risks and planning of fire protection of intelligent building (IBS) in viewpoint of architectual facility. The problems and cause of fire occurance in IBS is analysized. In near future, the most important facility configurations of IBS is composed of DDC (local controller), LAN for networking IBS. It is expected that emergency facilities and general equipments, plumbing, HVAC & electrical installation etc., are operated integratedly. Therefore, the standardization of H/W & S/W for communication in architectual facilities get accomplished for building amenity and reliability in near furure. This also discusses on the possibility of operation & planning of emergency facility system with DDC & LAN system and propose the high sensitive detection system for fire perfection and pressurized smoke protection system for IBS.

근대성의 한국적 변용에 대한 정치공동체론적 비판

홍원표 한국외국어대학교 사회과학연구소 2001 社會科學論集 Vol.18 No.2

粘性土地盤의 N値와 土質特性과의 相關性

홍원표,박성현 중앙대학교 기술과학연구소 2001 기술과학연구소 논문집 Vol.31 No.-

지반조사에서는 원위치시험으로는 표준관입시험, 정적콘관입시험, 동적콘관입시험, 스웨덴 식사운딩시험, 베인시험 등이 실시되고 있다. 특히, 이들 가운데 표준관입시험은 간편하면서도 유용한 원위치시험으로 가장 널리 이용되어져 오고 있다. 표준관입시험으로부터 얻어진 N치는 지반의 지지력, 침하량, 점착력, 내부마찰각, 상대밀도, 변형계수 등 다양한 해석정보를 얻는데 활용되고 있으나, N치의 지반특성과의 관계의 상관성에 대하여 아직 명확히 조사되어있지 않은 실정이다. 본 연구에서는 점성토지반에서의 표준관입시험에 의한 N치와 지반특성의 상관성을 규명하여 보고자 우리나라 서남해안지역의 연약한 점성토 및 내륙지역의 견고한 점성토에 대한 현장지반조사 및 실내시험 자료를 분석하였다. 본 연구의 결과는 결국, Atterberg한계, 자연함수비, 습윤 및 건조밀도, 일축압축강도와 압축지수 등과 같은 물리적, 역학적 특성의 예측에 이용될 수 있을 것이다. In soil investigations, in situ tests, such as standard penetration test, static cone penetration test, dutch cone penetration test, Swedish sounding test, vane test, etc, are performed as a part of main investigation. Especially, standard penetration test is most widely used as useful test in situ. N-value from the standard penetration test could give a numerous interpretation such as judgement of ground bearing capacity, settlements, cohesion, internal friction angle, relative density, modulus of deformation, etc. Nevertheless, in some respect to clear the correlations between N-value and soil properties are not enough yet. In this study, in order to find the correlations between N-value and soil properties in cohesive soils, the soil test data have been analyzed. The data was given by both the field soil investigation and laboratory test performed on soft clay in west and south coasts and stiff clay of inland areas in Korea. The results of this study might be available to predict some soil properties, such as the Atterberg limit, natural water content, wet and dry densities, unconfined compression strength and compression index, by use of the standard penetration test results in fields.

전력계통에서의 초전도전력기기의 제어 및 운전

홍원표 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.0201

An image of future power system which has introduced superconducting generator, cable, transformer, fault current limiter, SMES and so on is presented. Conceptual designs of each SC Machines and devices are carried out. The SC cable and SFCL utilize the high Tc superconductor(HTS) cooled by liquid N_2-. Other devices use low temperature superconducting cooled by liquid He. The SC power system models are proposed detailedly. In viewpoint of the operation and control SC power system, the concrete design direction and effective role of each SC apparatus are investigated. In this paper, superconducting fault limiters(SFCLS) should play an important part of the quenching current level coordination to prevent the other SC devices from quenching. Finially, SFCL are also expected to be very effective to introduce flexibility of power system planning and operation due to their possibility to enhance transient stability and reduce short circuit current.

초전도고장전류제한기가 포함된 전력시스템에서 고장전류계산방법과 고장전류억제효과 분석

홍원표 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

Design & Operation of power system for meeting increase of electric power demand is becoming more difficult and complex. One of reasons is increase of fault current. As one of the most effective methods for suppressing the fault current, installation of SFCL is expected. This paper describes a method of fault analyses of power system with SFCLs, and also discusses determination of specification two-bus electric power system with single transmission lines

전력시스템에서의 초전도전류제한기 운전방안

홍원표 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.0201

Design & Operation of power system for meeting increase of elecrtic power demands is becoming more difficult and complex. One of reasons is Increase of fault current. As one of the most effective methods for supressing the fault currents, insta1lation of SFCL are expected. An image of future hybrid & total Superconducting(SC) power system which have introduced SC generator, cable, transformer, fault current limiter, SMES & shunt reactor, etc. are presented. The pertinent and effective power system for the application of SFCL is also proposed. In the SC power system, it is pointed that a SFCL should play a important part of quenching current level coodination to prevent the other SC devices from quench.