A Study on Performance of Ventilated and Soundproof Windows with Vertical Baffles

• Main Authors: Kevin Hsaio, 蕭凱文
• Other Authors: Shi-Bin Huang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/18649810326231029123

碩士 === 高苑科技大學 === 建築研究所 === 99 === To face high density of urban development, the impact of noise environment is getting more seriously. For windows of buildings, in order to isolate outdoor noise, are always designed by high air tightness. It caused the problems of insufficient indoor ventilation that affected the healthy and comfort to residents. Therefore, this study focus on ventilation performance and noise performance of windows by experimental results, we expect to develop the best optimum type with both ventilation and sound insulation. This research installs the vertical baffles on ventilated and soundproof windows, to increase leading fresh air into indoor room for ventilation efficiency. Changing five different angles of vertical baffles and then to analyze the ventilation efficiency. The main purpose is to examine the ventilation and soundproof efficiency when applying the vertical baffles on ventilated and soundproof windows. 1. Applying vertical baffles with three different depths, those are 20cm, 30cm and 40cm, to install on ventilated and soundproof windows, and then to measure the wind speed. The results show that they are unable to achieve effective standards for the indoor natural ventilation, the data show whether the depths of the vertical baffles or not, it could not have significant upgrade for natural ventilation. 2. Measuring the vertical baffles with three different depths by five angles, the data of indoor natural ventilation was upgraded 0.75% by 22.5 degree angle, upgraded 2.19% by 45 degree angle, upgraded 1.88% by 67.5 degree angle, upgraded 3.89% by 90 degree angle, and upgraded 5.42% by 112.5 degree angle. The results show that the range of changed angles is larger the upgrade is more obvious for leading air into indoors. 3. Three types are measured, type one is upper inlet and lower exhaust with vertical baffles, type two is upper inlet and lower exhaust without vertical baffle, and type three is the upper inlet and direct exhaust, for a day-time measurement. The results show that type three has upgrade 65.63% of ventilation, 3 samples in 96 data passed indoor ventilation standards. Type two although increases 30.24% of ventilation, but does not pass the indoor ventilation standards. Type one gets 2.84% by the average of 15 samples, due to test specimens are installed in south direction, and experimental time is in March and April, wind flow was in northwest direction, so this type of indoor ventilation are almost less than the standard . 4. To measure sound insulation of three different depth of vertical baffles. The results, are averaged by five angles, show that 20cm has 15.7 dB (A) of sound insulation, 30cm has 17.0 dB (A) of sound insulation, and 40cm has 16.0 dB (A) of sound insulation. It obviously shows 10cm of depth difference on each vertical baffle, the affection of sound insulation is limited. To view the influence of applying vertical baffles on ventilated and soundproof windows, Ventilation is varied with changing angles on vertical baffles by wind direction during day time. In final, 20cm depth and 67.5 degree angle is the best optimum type in this research.