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엄한샘(Han-Saem Eom),홍부표(Boo-Pyo Hong),최동원(Dong-won Choi),최휘웅(Hwi-Woong Choi),윤정인(Jung-In Yoon),최광환(Kwang-Hwan Choi) 한국태양에너지학회 2012 한국태양에너지학회 학술대회논문집 Vol.2012 No.11
It is essential to know the climatic characteristics of the site for energy efficient building design. However, it is difficult to obtain a climate data through the new energy system device. Even if the new data is obtained, it is difficult to be applied to the building. Because it is usually consisted of just series of efficiency. In the meaning, a solar air heating has low efficiency compared with the solar water heating because of the smaller thermal capacity. The heat received by solar air-water combined system plate is not fully transferred to the air and then a part of them became the losses to the environment through conduction and convection process. This research is focusing on the investigation of efficiency of better combined multi-purposed system suggested by us and aims to secure the more effective solar energy utilization by combining the hot water and air heating system.
에어커튼 설치 시의 저장 창고에서의 에너지절약 효과에 관한 연구
최동원(Choi Dong-Won),엄한샘(Eum Han-Seom),윤정인(Yoon Jung-In),최광환(Choi Kwang-Hwan),B. Agung,Yoo Jin-Kwang 한국태양에너지학회 2013 한국태양에너지학회 학술대회논문집 Vol.2013 No.4
An air curtain system is one of the most effective devices to cut the energy loss in stead of conventional air conditioning system. Especially when it is applied to the chamber that needs circumstance to be controlled, it can bring up more energy conservation than any type of air conditioner. For those reasons, air curtain system is now highlighted from the point of energy saving and it would be expected as an effective method replacing conventional air conditioning. It was also reported that air curtain system has more advantages than typical air conditioner when it is installed in the cold storage. This study has dealt with field test results of air curtain system where it was attached with a large-size scale low-temperature warehouse in Korea. It was also clear that energy saving with the air curtain system has recorded above 30% of total electricity consumption compared to conventional refrigerating system and it also has area to be compensated for the future.
삼각저항체가 설치된 태양열 공기-물 가열기의 풍량 및 유량에 따른 집열 성능 평가
이인한(Lee In-han),문광암(Moon Kwang-am),최휘웅(Choi Hwi-ung),최광환(Choi Kwang-hwan) 한국태양에너지학회 2022 한국태양에너지학회 논문집 Vol.42 No.6
Approximately 40% of the domestic building load is used for heating and cooling, and fossil fuels are commonly used to produce heat. To lower the proportion of fossil fuels, policy subsidies for the use of new and renewable energy facilities are being activated. Among them, solar thermal systems can contribute to reducing the heating load of buildings, including hot water supply and space heating. The production of thermal energy in this solar thermal system takes place in a collector, and the heat collection system is generally categorized into an air-type solar collector, which can heat only air, and a water-type solar collector, which can heat only water. In contrast, a solar air-water heater is a collector that can heat air and water simultaneously and can be applied to both hot water supply and space heating, occupying the same area. This system can also improve solar energy utilization by retrieving waste heat at the top of the absorber plate. In this system, the increase in thermal efficiency of the air side results in an improvement in the total efficiency of the collector as well as the air heating performance. Furthermore, the performance of the solar air-water heater is affected by air and water mass flow rates. Thus, in this study, a novel type of solar air-water heater with a triangle obstacle was fabricated, and the thermal performance of this system was experimentally evaluated using various air and water mass flow rates when air and water were heated simultaneously. We observed that a higher air and water mass flow rate can lead to higher thermal performance of the suggested system.