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이수만(Soo Man Lee),김동윤(Dong Yun Kim),안정혁(Jung Hyuk Ahn),엄재용(Jae Yong Eom),신우철(U Cheul Shin) 대한설비공학회 2017 대한설비공학회 학술발표대회논문집 Vol.2017 No.6
본 논문에서는 국내 건축구법의 창 설치방법과 설치위치에 따른 접합 열교부위의 열성능을 평가하고 이를 설계자료로 제공하고자 한다. 연구방법으로는 시방서를 통한 국내 창호 시공방법을 조사하고 “창호에너지 효율등급” 1등급의 이중창과 “건축물의 에너지 절약 설계기준” 중부지방을 기준으로 하는 벽체를 선정하였다. 내·외단열에 따른 선형열관류율을 분석하였다. 분석결과 이중창의 좌·우 트랙의 위치에 따라 선형열관류율 값이 차이가 났으며, 내단열에 비해 외단열의 경우가 높은 것으로 나타났다.
안정혁,송명호 동국대학교 산업기술연구원 2000 산업기술논문집 Vol.11 No.1
Thermal design for medium and small size outdoor enclosures of electronic equipments serving as base stations and repeaters for mobile communication is required in order to prevent the malfunctioning resulting from the excessive temperature rise due to the excessive internal heat generation. Electronic equipments for the repeaters have become smaller in size while they consume gradually more power. In general, outdoor enclosures are mechanically sealed to provide the protection from the dust and moisture contained in the surrounding atmosphere and from the pilferage, which add the difficulties in the release of the internally generated heat. A thermal design for a small size enclosure (300W power consumption) has been completed and the application for the registration is submitted. As the small enclosure has no moving part in order to guarantee the extended life time, it can only utilize extended surface area (fins) and exterior natural convection hear transfer. The optimized configurations of the external fins has the pitch of 8 mm and the thickness of 0.8mm. Since the fin arrays could not be manufactured by the extrusion process, the parallel grooves were carved into the base plate and thin Aluminium plates of nonuniform heights were compression fitted along the grooves. A thermal design for the medium size enclosure (1.1 kW power consumption) design has also been developed and acquired the copy right in registered designs. the medium size enclosure uses heat exchangers and flow driving fans. the constant temperature test booth of 1.5 m and 2 m in length and width, 2.5 m in height has been built and imposed the extreme summer temperature conditions.
알루미늄 薄膜과 合成樹脂 多隔室 構造로 이루어진 板形 素材의 斷熱 特性
이온구,이동진,안정혁,송명호 동국대학교 산업기술환경대학원 1998 산업기술논총 Vol.4 No.-
An experimental and theoretical study on heat transfer characteristics of a polymer bubble film sandwiched between two aluminium foils has been conducted in order to obtain better understanding required for improved design of reflective insulation materials. Mathematical models, accounting for diffusive, convective and radiative mode of energy transfer and utilizing equivalent thermal resistance circuit, were set up. The predicted value of effective heat transfer coefficient served as reference for the measured effective thermal conductivities. The effective thermal conductivities of the specimen were also experimentally determined from the measured values of temperature difference and heat generation rate utilizing guarded hot box method for different orientations of specimen relative to the gravity direction and for different temperatures. The predicted and measured results showed good agreements and revealed that insulation decreases as the temperature difference increases when the imposed temperature gradient is either horizontal or downward. The smaller bubble size then those of present specimen is desirable for better insulation performance.