Study on Parking Lot Ventilation Design Using Computational Fluid Simulation

• Main Authors: CHEN, TSUNG CHUN, 陳宗群
• Other Authors: SHU, YI- LIANG
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/2qjz7g

碩士 === 中臺科技大學 === 環境與安全衛生工程系碩士班 === 107 === Nowadays in Taiwan there are lots of job opportunity focus on big city, therefore the architectural type is going to high or even super high buildings to solve the rising residential demand. In the meanwhile, it’s inevitable trendy of planning and design the basement to parking lot to solve the parking issue of high or even high buildings. The parking lot is a confined space, if the emission from vehicle can’t be exhausted efficiently, the air quality in parking lot will be bad. Currently in Taiwan, the regulations and researches for air quality in parking lot in high or super high buildings are still lacking. This study case is chosen from a new building in Taichung city to research parking lot ventilation by FDS which can simulate the emission of CO, CO2 and temperature from vehicle to estimate the air quality pattern in underground parking lot. Therefore it could understand which kind of ventilation design in underground parking lot is related to emission concentration from vehicle. According to different ventilation design pattern, air flow, emission concentration and temperature, this study simulate the situation of the maximum vehicle engine on at same time in the underground parking lot by FDS to approach the authenticity. Meanwhile it can also review the regulations for underground parking lot is suitable. In the simulation result of different ventilation design, the best way to control emission concentration and emission temperature is mechanical air intake plus mechanical exhaust. The second way to control it is natural air inlet plus mechanical exhaust without split-type air, but this way will cause the whole flow field split in half; the emission concentration and temperature in exhaust is extremely high. If it is natural air plus mechanical exhaust with split-type air, the emission concentration and temperature will spread to whole underground parking lot and the environment is worsen. At last the worst environment is without any ventilation design in underground parking lot. In the future according to the back-parking habit to design the ventilation of underground parking lot in high or super high buildings, it should design Induced Flow Jet Fan above each parking space to increase the air flow of emission. Nowadays the parking lot ventilation equipment is always launch on by time meter, so there is not any ventilation system on during the time meter which is off. The suggestion of this study is to set up air quality monitoring system which is 24 hours automatically start to achieve good air quality in underground parking lot.