Applying derivational theoretical equation and CFD software simulation improve indoor environmental effect for zeolite catalyst system

• Main Authors: Shu-Cheng Chu, 朱書政
• Other Authors: Chu-Chin Hsieh
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/68595289216050275811

碩士 === 國立雲林科技大學 === 防災與環境工程研究所 === 99 === In recent years, indoor air quality related issues are widely concerned on international conferences. In this research, we focus on air-conditioning and conduct a 2-phases investigation. In the first stage, we analyze the model of air current in an air-conditioned room by numerical simulation. Based on the results of simulation and experimentation, we change the design of tubes to improve distribution of airstream, heat, and particles. Although the indoor air conditioner is much poorer than outdoor in general, but the filtered air contains less bacterial than the outdoor air. Thus the concentration of bacterial can’t be reduced efficiently if we exhaust the processed air and draw it back from outside. So, we set the type of circulation as indoor circulation in the remaining study. There are two parts in the second stage. The first part is to discuss the anti-bacterial efficiency of different filtration materials through deriving the theoretical formula and to dissect the sensitivity of parameters. From this part, we have that: When the parameters are greater than the control group’s parameters, the sensitivity shows the tendency: “Size of Space” > “Initial Concentration of Bacteria” > “The Amount of Zeolite Used” > “Ventilation Rate” > “Number of People”. Otherwise, when the parameters are greater than the control group’s parameters, then it has a different tendency: “Initial Concentration of Bacteria” > “The Amount of Zeolite Used” > “Size of Space” > “Number of People” > “Ventilation Rate”. Another part is to explore a better installation standard of air filtration system by using numerical simulation. We find out that under the same cross area of return air pipe, the smaller the diameter of each return air pipe are, the more appropriate the air flow forms.