• 한국화재소방학회논문지
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• 제24권1호
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• pp.31-39
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• 2010

우리나라는 선진국에 비하여 스프링클러설비 의무 설치대상이 다소 제한적인데도 불구하고 대부분의 건축물 소유주 또는 운영주체들은 법률에서 지정하고 있는 설치대상 건축물에 한해서만 설치하거나, 건축물 설계 시 스프링클러설비의 설치대상 기준에 해당되지 않도록 하는 경향이 있다. 이는 건축물의 화재 안전성 보다는 스프링클러설비 설치비용의 절감이 우선적이라고 생각하고 있기 때문으로 사료된다. 따라서 본 연구에서는 스프링클러설비를 설치하고 관리하는데 소요되는 제반 비용을 투자의 개념으로 하여 이로부터 얻을 수 있는 급부를 추정하였다. 결과적으로 스프링클러설비의 투자비용과 설치하였을 경우 얻을 수 있는 경제적 이득을 경제적 효용성 분석을 통하여 비교한 결과, 초기 투자비용 회수기간이 건축물의 내구연한의 약 1/20 수준으로 나타났으며 효용성도 비용의 2배 이상으로 나타났다. 따라서 스프링클러 설치는 경제적 효용성을 갖춘 제도로 볼 수 있어 적극적인 확대를 고려해 보는 것이 바람직할 것이다.

• 환경영향평가
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• 제21권6호
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• pp.927-939
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• 2012

Cool roofs are currently being emerged as one of important mechanism to save energy in relation to the building. Although green roof has already gained nation-wide recognition as a typical method of energy saving in the roof, this approach did not provide a realistic evidence that is economically feasible in terms of installation cost. This research is primarily intended to compare installation cost between the two techniques. This research proposes a comparative evaluation framework in a more objective and quantitative way for an installation cost between the two techniques. Kyungpook National University (KNU) was selected as a survey objective and an exhaustive and realistic comparison of installation cost between the two techniques was conducted, based on Life Cycle Cost analysis (initial investment cost, maintenance cost, dismantling and waste disposal expense). It was possible to identify that installation cost of cool roofs is 4.7 times cheaper than that of green roof. Also present value based on probabilistic approach was identified as 0.25 (4.95) higher than the installation cost on the assumption of constant price and interest. It is expected that much more installation cost for the large scale green roof will be required since small-size green roof selected as a survey objective in this study could be operated under less initial installation and maintenance condition.

• 조명전기설비학회논문지
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• 제15권3호
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• pp.74-82
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• 2001

유지·보수를 위한 비용과 선로의 안정성과 신뢰성을 저해하는 정전 등의 사고를 감소시키기 위해서는 오손정도에 대한 정확한 측정이 선행되어야만 한다. 그러나, IEC 60815 등을 통해 추천되어 많은 연구에 있어 사용되어 온 수동 필세법은 인력, 비용, 측정오차 등의 측면에 있어 많은 문제점을 지니고 있다. 이에 본 연구에서는 옥외 환경에서 사용되는 애자표면의 오손정도를 측정할 수 있는 새로운 형태의 자동측정장치의 개발을 목적으로 한 일련의 연구를 수행하고자 한다. 장비의 설계 및 평가를 위해 FLUX 2D를 이용한 시뮬레이션과 인공오손과 관련한 다양한 실험을 수행하였다. 이와 같은 노력의 결과, 새로운 형태의 오손도 자동측정장치의 개발에 있어 중요한 것으로 사려되는 몇몇 결론을 얻을 수 있었다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2007년도 춘계학술대회 논문집
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• pp.1707-1713
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• 2007

If GNSS-based location information, expected to become the mainstream of the future technology, is applied to the future transportation, it will be of benefit to as follows; cost reducing effects on operating expanse and constructing expense due to decrease of ground unit installation, development of new technologies for train, or vehicle control system and becoming a front runner in the market. Therefore, this paper provides the minimum requirements for GNSS based system thru the studies on the applicability of GNSS based system to railway system, distinctions of the new technology between the existing technologies, and location accuracy.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 춘계학술대회 논문집
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• pp.393-396
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• 2007

Recently one level higher intelligent switching board than established one by the application of intelligent building and digital system are being constructed. Therefore facility's high efficiency, high degree satisfaction, miniaturaization, standardization through application of communication technology and monitoring and controlling by computer system utilized by web-basis power control system and electric IT are practiced. Especially network must be constructed through unified IBS server that monitors every educational institute's switching boards in real time control system. And I intend to create methods to save energy and raise electricity quality by power demand prediction and remote-controled management and operation. In this thesis I intend to suggest measures of forming unified system through researching educational institute's ways of constructing switching board and status analysis and overcoming technical difficulties in user's side and saving and maintenance expense.

• 조명전기설비학회논문지
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• 제22권1호
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• pp.1-6
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• 2008

도로조명의 적절한 보수를 위하여, 조명 수준을 정확하게 파악하는 것이 매우 중요하다. 본 논문에서는 2분할 수광방식을 고안하여, 차량을 이용한 조도측정시스템을 개발하였다. 이 시스템은 넓지 않은 면적을 차지하고 도로의 흐름을 차단하지 않고 신속하고 신뢰성 높은 데이터를 자동으로 측정 저장할 수 있다. 따라서 도로조명 측정에서 많은 비용과 시간을 절약할 수 있다.

• 조명전기설비학회논문지
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• 제25권11호
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• pp.67-72
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• 2011

Recently, photovoltaic generator system is widely extended by energy policy of the government. Add to this, for high efficiency of power generation per natural light unit area is needed to sun tracking system. And it is needed to condensed light generator for reducer of equipment expense. As method of solving this problem, this paper is developed multi-flat reflector sun tracking system for sun photocell maximum power generation. The system is consisted of multi-flat reflector and two axes machinery and sun location perceiver and AVR controller. GaAs 3J cell generated 6.75 times power more than silicon cell by times condensing light system. As a result, condensing light system of multi-flat reflector generated maximum power and showed reducing costs to photovoltaic generator.

• 한국생산제조학회지
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• 제21권1호
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• pp.156-160
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• 2012

Recently WCDMA signal transmission technology by large output microwave antenna have showed reduction of human resources and operating expense. But the existing antenna brackets cost is very expensive also its structure and functions are complicated. Unit brackets, suspending some sensors, subjected to acceleration loads, often fail due to self-vibration. To prevent such failures, it is necessary to understand the fatigue failure mode and to evaluate the fatigue life using tests or analysis techniques. The objective of this study is to develop the component test specifications, which are applicable to predict fatigue life at initial product design step, for unit brackets using vibration fatigue technique. So its application is limited to installation and management. In this project, we studied about more convenient bracket for microwave antennas through improvement on the existing antenna bracket's shortcoming and could develop an improved universal antenna bracket system for simple installation and application.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 춘계학술대회 논문집 전기설비전문위원
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• pp.58-60
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• 2007

This paper introduces the IN-FLEX system using aluminum clad flex cable, which is expected to alternate the conventional wiring method, such as, a steel pipe wiring method, and a synthetic resin pipe wiring method. The aluminum clad flex cable has a superior operation characteristics in heat dissipation property, in installation and maintenance facility, flammability, and appearance. Moreover, the IN-FLEX system adopted an easy connection mechanism which enable to reduce the time, hands and expense for the installation and maintenance of the system. Certification tests verifying the superior operation characteristics and reliability of the system using aluminum clad flex cable were carried with standard method in KOLAS certification institute.

• 대한건축학회논문집:구조계
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• 제35권4호
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• pp.185-192
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• 2019

In this study, we, through case studies, formulated a method to implement net-zero energy daycare center at the current insulation and technology level, and calculated its energy expense. The reference model was a medium sized daycare center whose number of children was 99. We analyzed the energy consumption status for the reference model and developed TRNSYS simulation analytical model to realize net-zero energy . We assumed the reference model to be "All Electric Building" where all energy including cooking is supplied by electricity. The result is summarized as follows: First, the annual electricity consumption of daycare center was 53,291kWh. Plug load occupied the largest share of 48% followed by lighting, 10%, cooling, 9%, cooking, 9%, heating, 8%, hot water, 5% and ventilation, 2%. Second, the photovoltaic installation capacity to realize net-zero energy was 40.32kWp and its annual generation was 53,402kWh. Third, the annual energy expense(electricity bill) by realizing net-zero energy was 2,620,390won.