The study of improving indoor thermal environment by using natural ventilation design-the case study of administration building in National Ilan University

• Main Authors: Chang-Hsien Chou, 周昌賢
• Other Authors: Hsin Yu
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/73j3fs

碩士 === 國立宜蘭大學 === 土木工程學系碩士班 === 102 === The building consumes more energy to achieve thermal comfort because of the global temperature increase resulted from greenhouse effect. The research related to this topic of energy saving by using construction method of green building was numerous. The object of this study is the administration building of National Ilan University. The indoor environment is hot because of the greenhouse effect resulted from the design of glass curtain with solar incidence and poor ventilation. Different types of opening were assumed in the stairs and hallways. Then computational fluid dynamics (CFD) software was used to simulate the flow field and temperature field, and heat gain was analyzed. The optimal opening methods were conducted by the results of simulation and analyzed process. The results of the study show that the decrease of temperature is not significant by the opening of stairs and hallways. The average temperature of layout 1 to layout 7 is about 0.1℃ less than that of the original layout, but the average temperature decreases significantly in layout 8 and layout 9 by opening of windward side. The highest average airspeed is 0.1 m/s in the stairs of layout 1 to 7, but the average airspeed exceeds 0.5 m/s after improvement. The difference of average airspeed between original layout and layout 1 to 7 is 0.1 m/s, but the average airspeed exceeds 2.5 m/s when the opening is in the windward side as in layout 8 and layout 9. The heat gains are almost equal to 110 W/m2 in different layouts. The layout 10 and layout 11 are arranged from the analysis of layout 1 to layout 9. The environment improvement of layout 10 and layout 11 without opening in stairs is similar as in layout 9. The results derive the importance of natural ventilation from the opening of windward side. The effect of natural ventilation reduces the extra indoor heat by the design of building orientation and the path of wind. The improvement by using natural ventilation achieves thermal comfort with saving of renovation cost.