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포터블 환경모니터링 시스템 구축을 위한 무선센서의 신뢰성 검토
최석용(Choi Seok-Yong),이정재(Yee Jurng-Jae),조수(Cho Soo) 한국건축친환경설비학회 2009 한국건축친환경설비학회 논문집 Vol.3 No.2
Researches and developments on BEMS, which are the cutting edge technology for energy saving in buildings, are performed world-widely through sustainable management in various conditions. However, there are many obstacles to adapt the system in existing buildings because it needs not only the extra administrator who manages the energy, but also needs highly expensive equipments, which are designed for newly built buildings, to install. Therefore, there are numerous limits exist when applying the BEMS in established buildings. PEMS(Portable Energy Management System) could overcome the weakness of previous system. The purpose of this study the reliability of wireless sensor, which is the essential technology to develop PEMS. This study has performed basic measurement compared with other sensors, which have the reliability. The result of this study is as follows ; 1) wireless temperature sensor has reliability when temperature is fixed at 26℃, 2) wireless temperature sensor has not reliability when being rapid temperature change at 2~32℃. 3) wireless humidity sensor has reliability when humidity is fixed at 35%. 4) wireless humidity temperature sensor has not reliability when being rapid humidity change at 40~80%. 5) The average error rate of wireless illuminance sensor is 10%.
외기조건변화에 따른 전열교환 환기유니트용 열교환소자의 열교환 성능예측에 관한 연구
최석용(Choi Seok-Yong),이정재(Yee Jurng-Jae),박미지(Park Mi-Ji),김석근(Kim Seok-Keun),김광현(Kim Kwang-Hyun) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.2
In order to secure environment of indoor air quality, we need inflow of the fresh air from outside, and also there will be the loss of energy. Recently, it is issuing to adjust of ventilation equipment for reducing these losses of energy. It is effective way that total heat recovery ventilator is not only to reduce pollution level of indoor but also to save energy. However, the operation and design was inconsiderately performed because of lack of understanding of these systems, so it occurs these problems not doing its natural purpose which saves energy. Therefore, in order to solve these problems, it is important to study heat recovery ventilator system before using them. In this study, we make an performance prediction on efficiency of sensible heat and latent heat of element cores as a result of changing temperature and humidity of outdoor with using artificial climate lab, so it will be used basic materials for plans of saving energy of the building.
최석용(Choi Seok-Yong),이정재(Yee Jurng-Jae) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.3
Building materials which are not properly verified their harmful chemical emission have been widely used in architecture. The fact has caused air pollution and become sick house syndrome in korea. As living environment for human body became a concern, many studies about reducing air pollution in living areas are going on nowadays. This study analyzed the resisting effect of HCHO and VOCS based on data obtained from experimentation on a newly built apartment by PHI(Photo-Hydro Ionization) unit, which has been used in developed countries(like the USA), and by bake-out, which is a testing program designed to improve indoor air quality at ante occupancy in a newly built apartment in Korea. The result of this experiment shows that PHI is more efficient than bake-out. However, it doesn't exactly coincide with the standard indoor air quality of Korea. For practical use of PHI unit, we need to continue studying how to multiply the size of PHI cell and the fan adhered to unit.
최석용(Choi Seok-Yong),이정재(Yee Jurng-Jae),최진혁(Choi Jin-Hyuk),김용경(Kim Yong-Kyoung),이성진(Lee Sung-Jin) 대한건축학회 2009 대한건축학회논문집 Vol.25 No.1
The purpose of this study is to evaluate the environmental performance of the box type double skin facade (DSF) system. The results of this study are as follows; (1) The peak of air temperature within the air cavity appeared 1 hour later after the peak time of outdoor temperature. It appears that the air cavity had a time delay effect. (2) There was about 3℃ temperature difference between the upper zone and the lower zone in case 3. It appears that the sun control window films could reduce the solar radiation. (3) The difference of sound pressure level (SPL) between case A and case D was up to 32.4 dB, at least 17.3㏈ in each frequency band. It appears that sound insulation effect of DSF system would be approximately 39 ㏈ (4) The difference of the illuminance level between separation distance, 1 m, and separation distance 5 m, was up to approximately 1350 lx, at least approximately 250 lx. It appears that would not be necessary to use artificial lighting within 3 m from window side because of the natural lighting being through the window and light shelf.
등압법과 T-Method법을 이용한 주택환기시스템 덕트설계법의 비교실험
주성용(Sung-Yong Joo),김광현(Kwang-Hyun Kim),최석용(Seok-Yong Choi),이정재(Jurng-Jae Yee) 대한설비공학회 2006 대한설비공학회 학술발표대회논문집 Vol.2006 No.6
Accurate flow rate distribution has been become a very important part for controling of air change rate since the introduction of house ventilation system. An inappropriate selection of fan due to incorrect prediction of friction loss makes waste energy. The purpose of this study is to recognize applicability of T-Method at house ventilation system by comparing experiment with T-method. The result of this study is as follows. Flow rate is small amount in a house, so duct size must be accurate. And duct design with Equal Friction Loss Method presented large error range. Equal friction loss method is not fit to applicate small amount air flow rate. T-Method predicts accurate flow rate comparatively in a house ventilation system. Error range was 3.5%.
주택용 환기시스템의 덕트설계를 위한 분배기 적용성 검토
이정재(Jurng-Jae Yee),최석용(Seok-Yong Choi),김석근(Seok-Keun Kim),김광현(Kwang-Hyun Kim),이영우(Young-Woo Lee),김환용(Hwan-Yong Kim) 대한설비공학회 2007 설비공학 논문집 Vol.19 No.11
Although these days application of heat recovery ventilation and improved kitchen ventilation system came into wide use in mixed-use residential buildings and exclusive residences, there are not enough ventilation systems except the local ventilation of kitchens and rest rooms. It is very important part to regulate and distribute correct air flow rate for controlling air change rate. The purpose of this study is to investigate the application of distributor at house ventilation system by comparing a duct system with out distributor and with distributor. The results of this study are as follows. (1) When using distributor though the size of duct diameter is reduced rapidly, the pressure loss doesn't rise largely. The pressure loss without distributor is 4.08 ㎜Aq, the pressure loss with distributor 4.10 ㎜Aq. (2) To use distributor can reduce materials of duct and secure enough ceiling space by reducing duct diameter. (3) Diameters and air flow paths of distributor on the design stage are important part for accurate air flow rate.