• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.4 no.1
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• pp.1-10
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• 1992

The purpose of this paper is to provide an efficient method of operating and designing HVAC systems for reasonable energy consumption in building. Accroding to the conditions of indoor temperature and humidity, and the methods of dividing and grouping the capacity of boiler and refrigerator, the amount of their annual energy consumptions is simulated by using an energy analysis program which is developed in this paper, and opatimal design methods of HVAC system are suggested as well.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.18 no.4
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• pp.344-350
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• 2006

The present study investigates the characteristics of fire-driven heat flows and gas concentration in a compartment fire by using the modified VHS model (MVHS). The main idea of this model is to add some source terms for combustion products and oxygen consumption to the original VHS model for providing more accurate and useful information on gas concentration distributions as well as thermal fields. It is found that the present MVHS model shows fairly good agreement with the experimental data and the eddy breakup combustion model. The tilting angle of fire plume calculated by MVHS is larger than that of EBU model because the fire source of VHS is affected by ventilating flow less than EBU. However, this discrepancy is apparently reduced in the downstream region of fire source.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.512-518
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• 2006

Economize the energy, further study is highly needed at the very beginning stage of the building plan. To fulfill this study, research of the buildings in Busan will be carried out, and find out the relations between pure load of buildings and capacity of heat & cooling equipment. Therefore this study is suggesting better idea of calculating capacity from having a thorough grasp of the problem with comparing and analyzing of extra-factor.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.15 no.11
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• pp.928-936
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• 2003

In the present study, feasibility investigation on the solar assisted hot water supply system for apartment houses was carried out by the review of service facility and heat load pattern. Also analysis and experiment of the small sized system model were performed. This hybrid system are consists of solar collector, heat storage tank, controller, and gas boiler using LPG as a secondary heat source. The analytical results showed a good agreement with experimental data. We found that this hybrid system could reduce the energy cost by 30% for hot water compared to typical boiler system in the apartment houses. Also we showed that this model could be used for the energy and economic analysis of the hybrid system.

• 월간 기계설비
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• s.233
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• pp.55-57
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• 2009

국토해양부는 지난 10월 20일 20가구 이상의 공동주택을 건설할 경우 총에너지를 종전보다 10~15% 이상 절감토록 하는 내용의 '친환경 주택의 건설기준 및 성능'을 고시하고 이날부터 시행에 들어갔다. 국토부는 친환경적인 주택 건설을 위한 제도적 기반을 구축하기 위해 에너지 소비절감 및 탄소배출량 감소를 위한 에너지절약형 친환경 주택의 건설기준 및 성능을 마련한 것이다. 이 고시는 친환경 주택으로 인정받기 위한 필수시설 및 각각의 설치기준 제시와 에너지 사용용도에 따라 난방, 급탕, 전력, 열원 등 4개로 분류하는 친환경주택 성능 평가방법 등을 규정했다.

• Proceedings of the SAREK Conference
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• 2007.06a
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• pp.143-143
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• 2007

• Proceedings of the SAREK Conference
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• 2003.07a
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• pp.187-187
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• 2003

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.10
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• pp.100-106
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• 2009

In this study, methods of overheat detection at the coupling or wire in electrical facility are investigated, operating characteristic about the optic temperature sensor for continuous on-line temperature monitoring in diagnostics system of electrical facility is analyzed. Heating sources in the experiment for operating characteristics of optic temperature sensor use black body and hot plate, output voltage of optic temperature sensor in accordance with temperature variation is analyzed. Overheat generation due to poor contact at the circuit breaker in panel board detects using a thermocouple, infrared thermal camera and optic temperature sensor, and experiment results are analyzed. The effect of optic temperature sensor is the same that of other methods. These results expect to use basic research material for adjusting field of electrical diagnostics system using RFID type optic temperature sensor in the near future.

• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.59-59
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• 2006

• Proceedings of the SAREK Conference
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• 2006.11a
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• pp.10-10
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• 2006