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열교부위를 고려한 커튼월 사무소 건물의 열성능 해석에 관한 연구
신우철(Shin U-Cheul),김승철(Kim Seung-Chul),윤종호(Yoon Jong-Ho) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.3
Currently, office buildings in Korea tend to adopt as their outer wall the curtain wall structure which can be easily constructed and has beautiful external appearance as well. However, the problem is that the curtain wall structure does not have a uniform composition unlike the wall of existing reinforced concrete structures and has a frame made of metal with high heat conduction. Therefore, it is expected that the structure will be highly influenced by the thermal bridge. Thereupon, this study analyzes how to set up the composition of the wall system and heat transmission rate in consideration of the thermal characteristics of the curtain wall structure and applies it in practice by simulation in order to propose a guideline for the energy simulation method of the curtain wall structure and analyze its differences from existing simulation methods.
신우철(Shin U-Cheul),백남춘(Baek Nam-Choon),김욱중(Kim Ook-Joong),고득용(Koh Deuk-Yong) 한국태양에너지학회 2006 한국태양에너지학회 논문집 Vol.26 No.2
The purpose of this study is to present the simulation results and an overview of the performance assessment of the Ground-Source Heat Pump(GSHP) system. The calculation was performed for two design factors: the spacing between boreholes and the depth of the vertical ground heat exchangers. And the simulation was carried out using the thermal simulation code TRNSYS with new model of water to water heat pump developed by this study. As a result, it was anticipated that the yearly mean COPs of heat pump for heating and cooling are about 3.7 and 5.8 respectively and the heat pump can supply 100% of heating and cooling load all the year around.
신우철(Shin U-Cheul),윤종호(Yoon Jong-Ho),백남춘(Baek Nam-Choon),곽희열(Kwak Hee-Yeul) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.2
On-off differential controller is one of the very important component which has influence on the system performance of the solar hot water system. In this study, it was analysed the influence of "on-off" setting temperature on the system efficiency and the electrical consumption by circulation pump. This study was performed by computer simulation using TRNSYS program. The simulation system was developed in this study was verified the its reliability by the experimental results.
신우철(Shin U-Cheul),백남춘(Baek Nam-Choon),곽희열(Kwak Hee-Yeul),주현로(Ju Hyunlo-Lo) 한국태양에너지학회 2006 한국태양에너지학회 논문집 Vol.26 No.2
The Purpose of this work is to investigate a long-term thermal performance of active solar hot water heating system for the dormitory of university. For this, monitering system including temperature sensors, flow-meters was installed in this system. Measurement was continued for 13 months between April 1st 2004 and May 31th 2005.<br/> As results, hot water demand, daily and monthly hot water load distribution which are necessary for the solar system design were suggested. Also thermal stratification in solar buffer tank was observed in the point of increasement of system efficiency. The yearly solar fraction and system efficiency of this system are about 29.5% and 44.9% respectively.