| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 92 === Abstract
This research uses Computational Fluid Dynamics software based on numerical analysis to simulate the inner flow field of gas-ozone reactor in all kinds of designed conditions to come out with the best design of inner gas-ozone reactor. The results of CFD simulation show that to evaluate the mixing effect and the pressure drop of system, the best shape of spoiler on both sides of the gas-ozone reactor is 入 , and the best shape of spoiler in the center of the gas-ozone reactor is square. The spoilers in the center are better than the spoilers on both sides of the gas-ozone reactor. The turbulence intensity increases 17% and the pressure difference drops 77% in the center compare to those on the both sides.
The CFD simulation shows that the best flow rate of gas-ozone disinfections system placed in the sickroom is 300 LPM, and the best position is the right side of sickbed and the different altitude has no effect on the air change rate. Besides, CFD software can simulate the distribution of gas-ozone concentration in the sickroom with gas-ozone disinfection system, and the results will be compared with limited value of NAAQS ( 120ppb). The results of evaluation the efficiency of space disinfection by using gas-ozone in the negative pressure isolation room of hospital showed that the range of ozone concentration in the negative pressure isolation room was 0.045~5ppm during the conditions was the outlet ozone concentration 100ppm and flow rate 300LPM. According to the studies, the efficiency of space disinfection could reach 99% for more bacteria and virus under this ozone concentration.
Key words : Severe Acute Respiratory Syndrome(SARS)、Ozone、
Space disinfection、Computational Fluid Dynamics
(CFD)、negative pressure isolation room
|
|---|
