초고층 복합건물에서 미활용에너지원으로서 하수처리수의 활용가능성 평가

임재한(Lim Jae-Han) 대한건축학회 2010 대한건축학회 학술발표대회 논문집 Vol.30 No.1

국내 공동주택에서 가전기기 보유 및 이용 현황

임재한(Lim, Jae-Han),송민영(Song, Min-Young),송승영(Song, Seung-Yeong) 대한건축학회 2013 대한건축학회 학술발표대회 논문집 Vol.33 No.2

난방운전조건에 따른 구체축열 복사난방 공간의 실내 온열 환경 특성

임재한(Lim, Jae Han),이윤선(Lee, Yoon Sun),이선우(Lee, Sun Woo) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.1

Thermally activated building system(TABS) is the embedded water-based radiant heating and cooling system to make use of large surface area for heating and cooling in building. This may be integrated in the building structure or attached to it. Generally this utilize the concrete core of the buildings, usually the floor slabs. And space heating and cooling can be achieved either by means of TABS alone, or with additional systems such as radiators. Because there are small temperature differences between water flow and room temperatures, it has been regarded as an energy efficient solutions. The big thermal storage capacity of TABS makes it possible to separate in peak-time heating/cooling demand of building and heating/cooling equipment. Also this can utilize the free cooling strategy at night and accommodate the solar thermal energy. This can be operated when electricity is cheap at night and intermittently operated to reduce the distribution energy of the heating circuit pumps. Because TABS has a very high thermal inertia, the room thermal environment is different from the existing all-air HVAC system during and heating and cooling operation. Therefore this paper aims to investigate indoor thermal environment of thermally activated building system (TABS) during different heating operation conditions at first. The full-scale experiments were carried out in a mock-up test room with TABS. The experiments were aimed to evaluate the indoor thermal environment in low-temperature heating for office buildings. A mock-up building with 4 test rooms was located in central region of Korea (Chung-ju). And three prototypes of TABS were integrated into the ceiling slab, in which hot water pipe embedded within concrete slab (Type A), double-pipe embedded within concrete slab (Type B) and double-pipe embedded within 2-way hollow core slab (Type C)) were installed. In these experiments, we compared the thermal environment of TABS heating operation with that of combined operation with electric radiator. During experiments, we measured the supply water temperatures, return water temperatures, ceiling surface temperatures, vertical air temperatures, and globe temperatures. In results, it was found that through the operation of TABS with electric radiator room thermal environment can be maintained within comfortable ranges. And there is no thermal discomfort due to the vertical difference of air temperature, radiant asymmetry.

히트펌프 냉난방시스템의 에너지, 엑서지 성능 평가 연구

임재한(Lim, Jae-Han) 한국건축친환경설비학회 2012 한국건축친환경설비학회 논문집 Vol.6 No.2

Today there has been a significant increase of energy consumption in domestic heating and cooling system. Heat pumps are widely used in various types of facilities including office buildings, public buildings, and campus buildings not only for air-conditioning and heating, but also for cooling and domestic hot water supply. To apply heat pump system to residential building efficiently, it is necessary to evaluate the efficiencies to gauge the performance of devices and processes. Many of these expressions are based on energy efficiency measure. But to assess the utilization efficiency of energy, it is useful to evaluate the exergy efficiencies together. The purpose of this paper is to evaluate the energy and exergy performance of heat pump system. To do this, the energy and exergy analysis of heat pump with water storage tank for residential building were performed and the exergy losses for each components of the system are identified. In conclusion, it was found that COP values for heat pump unit and the overall system were 3.4 and 1.68 respectively. Also the exergy efficiencies for heat pump unit and the overall system were 72.1% and 59.8%.

학교 건물에서 외부 차양 장치 유형에 따른 일반교실 내 빛환경 특성에 관한 연구

임재한(Lim, Jae-Han),정진주(Jung, Jin-Ju),이지영(Lee, Ji-Young) 한국교육시설학회 2008 敎育施設 Vol.15 No.2

The purpose of this study was to evaluate the characteristics of daylighting environment in classroom of an school building due to the external shading devices such as fixed louvers, light shelves and exterior venetian blinds. In this study, we have made a field research with regard to the facade design in classroom of an school building. And we have made a classification of external shading devices considering the design parameters. Finally, through RADIANCE simulation, we have calculated the spatial distribution of illuminance, uniformity ratio of illuminance and daylight factors. The results of this study will provide the building designer with the basic daylighting performance data at early design stages.

복사냉난방시스템 분야 국제 표준 개발 연구

임재한(Jae-Han Lim),신미수(Mi-Su Shin),여명석(Myoung-Souk Yeo),김광우(Kwang-Woo Kim) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7

Because of their high comfort level, low noise level, and energy saving effect, radiant heating and cooling systems have seen considerable increase in their use. Accordingly, nations around the world have developed and disseminated related technology and a part of standards regarding radiant heating and cooling system products have been adopted. To secure system performance, there must first be standards for processes and conditions that determine the heating and cooling capacity of radiant heating and cooling systems. The purpose of such standards lie above all in enabling these systems to perform in accordance with occupants’ comfort by providing standards for determining the heating and cooling capacity of radiant heating and cooling systems. The proposed standards may be seen as integrated design standards that make possible the effective design of the entire system by providing standards regarding heat emission calculation, panel design, and system construction. Such integrated design standards will be able to contribute to occupants’ comfort and the building’s energy reduction by allowing the designer to design systems with desired performance. The proposed standards provide criteria regarding dynamic analysis and will make analysis of the energy performance of radiant heating and cooling systems possible. In addition, they shall include the design conditions regarding parts such as the heat supply, hydronic distribution systems, panels, and control systems of radiant heating and cooling systems.

국내 주거건물에서 취사기기 사용이 실내공기환경에 미치는 영향

임재한(Lim, Jae-Han),김선요(Kim, Seon-Yo),송승영(Song, Seung-Young) 대한건축학회 2014 대한건축학회 학술발표대회 논문집 Vol.34 No.2

차축발열검지를 위한 4픽셀 적외선 디텍터 광학계에 관한 연구

임재우(Jae-Woo Lim),최재식(Jae-Sik Choi),윤석한(Seok-Han Yoon),신진호(Jin-Ho Shin),임형태(Hyung-Tae Lim),곽수영(Soo-Young Kwak) 한국철도학회 2013 한국철도학회 학술발표대회논문집 Vol.2013 No.5

현재 국내에 설치된 HBD(차축발열검지장치, Hot Box Detector)는 고속열차의 차축에서 발생하는 온도 검지를 위해 적외선을 이용한 비접촉 온도측정방식을 사용하고 있다. 비접촉 온도측정방식은 움직이는 사물에 대한 온도측정과 같이 접촉식 온도센서로 측정이 불가능한 환경에서도 온도측정을 가능하게 해준다. 본 연구에서 사용하는 적외선 디텍터는 총 4 개 픽셀로 이루어진 적외선 검지센서들을 사용하여 4개의 포인트에서 발생되는 3 ~ 5㎛의 파장대역의 적외선을 검지함으로써 온도를 측정한다. 적외선 디텍터를 사용하여 차축의 발열을 검지하기 위해서는 발열체에서 발생하는 적외선을 센서에 집중시켜 줄 수 있는 전용 광학계를 필요로 한다. 본 논문에서는 차축발열검지를 위해 4 개의 픽셀로 이루어진 적외선 디텍터를 위한 광학계의 개발에 관하여 소개하고자 한다. HBD(Hot Box Detector), which is installed in Korea, applies non-contact temperature measuring methods using infrared rays to detect the temperature emitted from the axle box of highspeed trains. The non-contact temperature measuring methods make it available to check the temperature that is impossible to measure with a contact temperature sensor like gauging the temperature of moving objects. The infrared detector used in this study utilizes the detection sensors that have total 4 pixels and measures the temperature by detecting the infrared light in 3 ~ 5㎛ wavelength band, which is generated in 4 points. Therefore, the dedicated optical system that is able to concentrate the infrared rays from heating elements on the sensors is required to detect the heat of axle box with the infrared detector. In this research, the development of optical system for 4-pixels infrared detector will be introduced to detect the heat of axle box.

오피스건물에서 구체축열시스템의 최적 제어 및 운전 방안

임재한(Jae-Han Lim),이윤선(Yoon-Sun Lee),이겨레(Keo-Re Lee) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.11

구체축열시스템은 구조체 축열로 인한 시간지연 특성을 고려하여 적절한 운전 제어를 통해 건물에서 최대 냉난방 부하를 저감함으로써 에너지 비용을 낮출 수도 있다. 반면, 국내의 고온다습한 하절기 기후 조건에서는 냉방운전시 방열면에서 결로 발생 위험이 상존하고 있다. 그러므로 본 연구에서는 오피스건물을 대상으로 적용방안을 도출하기 위해 기존 적용 사례 특성을 조사 분석하고, 동적 에너지해석 시뮬레이션을 통해 냉방운전시 결로방지 및 에너지 성능 특성에 대한 분석을 수행하였다. 이를 위해 우선 국내의 구체축열시스템 적용사례 및 국내 건축물 설계기준을 고려하여 오피스건물을 대상으로 건물 모델링을 구성하였고 이를 대상으로 구체축열시스템과 공조시스템의 통합운전인 구체축열 통합시스템을 구성하였다. 구체축열시스템과 변풍량시스템의 통합운전과 구체축열시스템과 외기전담공조시스템의 통합운전의 냉방에너지 성능을 비교하고 외기전담공조시스템 구성에 따른 냉방에너지 성능을 평가하였다.

실내외 베네시안 블라인드가 결합된 창호시스템의 일사획득계수에 미치는 영향

임재한(Jae-Han Lim) 한국생활환경학회 2010 한국생활환경학회지 Vol.17 No.5

Energy performance of glazing systems can be evaluated by U-value and SHGC(g-value, solar heat gain coefficient) through experiment and simulation. Normally the venetian blind has been used to obtain the comfortable day lighting environment and prevent the overheating due to the incident solar radiation. We can anticipate that the exterior shading device is superior to the interior shading device with regard to the cooling load reduction through the fenestration system by blocking the incident solar radiation. This paper aimed to evaluate the effect of interior and exterior venetian blinds on the SHGC of glazing system. SHGC was evaluated through the experiment and simulation. In results, the SHGC was different from each cases according to the location and slat angle of venetian blind. Also significant dependence on the intensity of incident solar radiation through the fenestration system was found in comparison of the SHGC according to the solar incident angle.