• Title/Summary/Keyword: Complex Installation

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A Study on the Assessment of Safety Performance for Complex Installation System of Stationary Fuel Cell and Boiler (건물용 연료전지-보일러 복합설치 안전성능 평가에 관한 연구)

  • Kim, Min-Woo;Lee, Eun-Kyung;Oh, Gun-Woo;Lee, Jung-Woon;Lee, Seung-Kuk
    • Korean Journal of Hazardous Materials
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    • v.6 no.2
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    • pp.77-86
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    • 2018
  • Interest in renewable energy is increasing for eco-friendly use of energy, and fuel cells are being used in various ways such as houses and buildings as power generation methods that have low emissions such as $NO_X$ and $CO_2$. As the supply of fuel cells expands, more and more boilers are installed in the existing buildings, but safety management is not being performed properly. Therefore, in this study, a prior study was conducted on the status of fuel cell-boiler complex installation and related criteria, and the risk factors were analyzed according to the installation environment and structure. Based on these standards, the safety performance of the fuel cell-boiler combined installation is assessed by conducting a demonstration using the starting product of the simulated operation to derive the installation criteria (proposal) for the fuel cell-boiler combined installation. The installation criteria (proposal) include the construction and connection method of the piping according to the fuel cell-boiler complex installation.

Implementation of Fiber Optic and Wireless Complex Communication Network for Distribution Automation using IEEE 802.11a WLAN technology (IEEE 802.11a WLAN 기술의 사용에 의한 배전자동화용 광무선 복합통신망의 구현)

  • Hwang, Jin-Kwon;Choi, Tae-Il
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.24 no.10
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    • pp.49-57
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    • 2010
  • In order to provide electricity to users economically and safely, distribution automation systems (DASs) monitor and operate components of distribution systems remotely through communication networks. The fiber optic communication network has been mainly installed for the DAS of Korea Electric Power Corporation (KEPCO) because of its huge bandwidth and dielectric noise immunity. However, the fiber optic communication network has some shortcomings that its installation cost and communication fee are expensive. This paper proposes a complex network where WLANs are combined with conventional fiber optic communication networks in order to expand DAS easily and inexpensively. A fixed wireless bridge communication unit (FWB-CU) for the proposed complex network is implemented using IEEE 802.11a WLAN technology. The proposed complex network is built actually to verify its feasibility experimentally as a DAS communication network.

The Characteristics of the Complex Discharge Type Ozonizer using Applied Voltage of a Inverse-Polarity and a Screw Type Electrode (역극성 전압인가와 나사형 전극을 이용한 복합방전형 오존발생기의 특성)

  • Song, Hyun-Jig
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.9
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    • pp.80-85
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    • 2011
  • In this paper, complex discharge type ozonizer with a screw type electrode has been designed and manufactured for environmental improvement using low power and high efficency ozoniazer. The complex discharge type ozonizer is equipped with three electrodes{central electrode(CE), internal electrode(IE) and external electrode(EE)}. Ozone of the complex discharge type ozonizer is generated by superposition of silent discharge and surface discharge in discharge space as a screw type CE and IE are respectively applied to AC high voltage of inverse-polarity has $180[^{\circ}]$ phase difference, EE is common electrode. In this time, when oxygen has been used as supplied gas, the maximum values of ozone concentration, ozone generation and ozone yield were obtained as 8,334[ppm], 3,249[mg/h] and 65.3[g/kwh].

A Study on Correlation between Improvement in Efficiency of PV and Green roof of Public Building (공공건물 옥상녹화와 설치태양광(PV)의 효율향상 상관관계 연구)

  • Lee, Eung Jik
    • KIEAE Journal
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    • v.13 no.5
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    • pp.111-118
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    • 2013
  • This study aims to investigate advantages of complex installation of green roof and PV system in a public building, to analyze the impact of green roof on the efficiency of PV power generation, and to consider the correlation between green roof and PV power generation. When the temperature and power generation of the modules installed in the green roof and non-green roof of the public building were measured for 3 days, the average temperature of the green roof was 23.6 degrees, and it was 36.1 degrees in the non-green roof which increased by nearly 53%. Overall, the module temperature in the green roof was lower. On the other hand, in relation to the PV generation depending on temperature reduction during the same period, the mono-crystalline module and the poly-crystalline module in the green roof showed an increase in generation at nearly 222.2W and 341.6W, and the efficiency rose by 5.5% and 6.2%, respectively, compared to the modules in the non-green roof. Therefore, it is analyzed that green roof has a positive influence on PV power generation. Finally shows the efficiency of the installed on the Green Roof PV system (complex Installation) higher than on the concrete roof PV system. Thus, the complex PV systems as well as the usual benefits of green roofs will provide greater synergies.

A Study on the Improvement of Electric Supervisory in Apartment Complex (아파트 단지의 전력감시반 개선 연구)

  • 홍규장;김채규
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 1993.10a
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    • pp.51-54
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    • 1993
  • In this paper, it is proposed the the SCADA(Supervisory control and Data Acquisition) system in Apartment complex. The proposed SCADA system make use of the computer CRT(Cathod RAy Tube), which automatically observe the Electrical Facility, Elvator Facility, Fire Alarm Facility and process in the real-time data. In order to improve the hardware performance and the information process, the SCADA system composed of master-slave topology and decentralized the supervisory Facility. This system is expected the retrenchment of construction expenditure and the level-up of supervisory execution.

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Optical Implementation of Three-Dimensional Image using Modified Triangular Interferometer (변형 삼각간섭계를 이용한 3차원 영상의 광학적 구현)

  • 김수길
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.18 no.1
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    • pp.15-20
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    • 2004
  • We presented the optical reconstruction system of complex hologram and theoretically demonstrated that the proposed system could display complex hologram. And we made the complex hologram of a three-dimensional image using the modified triangular interferometer, and presented and analyzed the three-dimensional images numerically and optically reconstructed from it.

A study on lighting plan in outdoor space of apartment complex (아파트 단지 내 옥외공간별 조명계획)

  • Park, Byoung-Chul;Choi, An-Seop;Choi, Sung-Youl
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.11a
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    • pp.73-77
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    • 2004
  • Outdoor space used for leisure life as inhabitantses' recreation and rest area, and night activity is very important space to many apartment complex. Lately, outdoor space is recognized as a very important space in apartment complex. Especially, that outdoor space is frequently used at night despite planning of lighting of current outdoor space is unprepared for the selection of suitable luminaires, arrangement of luminaire and lighting plan. From this point of view, this paper investigated the essence of light in outdoor space and analyzed different outdoor luminous environment. This paper finally suggested recommended level of illuminance and planning of lighting.

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