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이건태,강병하,이재헌,Lee, Geon-Tae,Gang, Byeong-Ha,Lee, Jae-Heon 대한기계학회 1998 大韓機械學會論文集B Vol.22 No.4
Fluid flow and heat transfer have been numerically investigated for an oscillating flow in a tube with a regenerator. The regenerator is placed between hot and cold spaces which are heated and cooled at uniform temperature. An oscillating flow is generated by the piston motion at both ends of a tube. The time dependent, two-dimensional Navier-Stokes equations and energy equation are solved by using the finite-volume and moving grid method. The regenerator is adopted as Brinkmann-Forchheimer extended Darcy model. Numerical results are obtained for the flow and temperature fields, and described the effects of the oscillating frequency and amplitude ratio by the piston motion as well as the aspect ratio. The numerical results obtained indicate that the heat transfer between the tube wall and oscillating flow is increased as the oscillating frequency, amplitude ratio and the aspect ratio are increased.
건물일체형 PV시스템을 오피스빌딩에 적용 시 고려되어야 할 설치 인자에 관한 연구
이건태(Lee Geon-Tae),강석윤(Kang Seok-Youn) 대한건축학회 2010 대한건축학회논문집 Vol.26 No.1
The purpose of this study was to analyze the maximum electric production according to an inclination and a direction of the PV installation and the effects of an installation distance to module length ratio. Annual solar insolation on PV panels was calculated for various facades of two buildings, and analysis of different horizontal and vertical inclination of PV panels was also conducted considering effects of panel shading from other panels and surrounding buildings. As a result, electric production by using the PV system can be covered approximately 1% to 5% of the electric energy consumption of an office building in terms of proper combinations of installation factors which are an inclination, a module type, an installation distance to module length ratio and a direction.
공동주택 주방 배기 시스템 구성 요소별 정압손실 특성에 따른 주방환기 성능에 관한 실험적 연구
최선호(Choi, Sun-Ho),이건태(Lee, Geon-Tae) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.3
The purpose of this study was to analyze the static pressure loss of exhaust fan affected by each component of kitchen ventilation system which is consisted of kitchen hood, filter, flexible or rigid duct and exhaust cap. Different kinds of each part of the kitchen ventilation system were chosen respectively among the material and components mainly installed in apartment housing. The static pressure was measured by test chamber that air flow rate is able to be controlled by 4 nozzles, inverter fan and controller. As a result, a high static pressure fan must be used in order to effectively prevent the spread of odor and air pollutant occurred in the kitchen of high air-tightness housing kitchen ventilation system because static pressure was higher than expected. If not, each part of kitchen ventilation system which static pressure loss is low will be needed.
김진호(Jin-Ho Kim),김중헌(Jung Hun Kim),이건태(Geon-Tae Lee) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Snow melting system is adapted for safety and environment sides. Geothermal System has some problem of unbalance between summer and winter heat loads. Snow melting system with piping system is widely adapted in Japan. In this paper, the variation of road surface temperature along time for heating load is investigated. And for checking the difference between electrical melting system and piping melting system, other design parameters is investigated.
전열교환기의 세대내 풍량 분배를 위한 CFD를 이용한 최적설계방안
김진호(Jin-Ho Kim),송난정(Nan-Jung Song),이건태(Geon-Tae Lee) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
After revision of law of architecture in 2006, all houses which have more 100 households must has ventilation unit for the indoor air quality. Optimal design of the natural and the mechanical ventilation has being considered. In this paper, it is carried out about optimal design for airflow distribution of total heat exchanger in houses using CFD. As the result, first design of ventilation has some problem in porch area. Adding diffusers in porch area and changing diffuser schedule make more efficient ventilation than original design.
복합 공간 구성 건물의 공조구역 운영 전략에 따른 에너지부하 특성 연구
육인수(In Soo Yook),김민환(Min Hwan Kim),남현진(Hyeon Jin Nam),김동호(Dong Ho Kim),설동문(Dong Mun Seol),이건태(Geon-Tae Lee),김진호(Jin-Ho Kim),김재민(Jae Min Kim) 대한설비공학회 2009 대한설비공학회 학술발표대회논문집 Vol.2009 No.-
Buildings with multi-complex spaces designed for architectural values and functional requirements give rise to technical challenges in terms of energy efficiency and thermal comfort. Since spaces in such buildings are connected with openings with geometrical complexity, it is hard to define zoning plan and to control heating/cooling loads effectively. This paper presents a case study on the evaluation of operation strategy for a building with multi-complex spaces using computer simulation. The modelling methodology and the results of the simulations are also described.