Measurement Of Ventilation Rates Using Tracer Gas Method In Walk-in Stability Chamber
As standard and performance of Walk in Stability Chamber (WiSC) at Universiti Tun Hussein Oun Malaysia (UTHM) has been determined from the previous studies, the current research is focused to establish protocol for air change rate (ACH) measurement inside chamber for various experimental studies on designing for human needs. The scopes include the preparation of zone selection, volume of tracer gas, injecting procedure, mixing time, sampling technique and the interval time within sample. All procedures were to follow ASTM Standard E471 to ensure the accuracy and validity of the data collected. Data collection started within three month from December 2007 to February 2008. Air temperature and relative humidity were set at 24~C and 60％ to 70％ respectively. An automated tracer gas monitor using SF6 gas as a tracer gas was employed for air change rate measurement. The environmental parameters measured are air temperature, relative humidity, Carbon Dioxide (CO2) and Carbon Monoxide (CO) gases using Indoor Air Quality (IAQ) meter. The results were compared to the ASHRAE Standard 62.1-2004, ASHRAE Standard 55-2004 and U.S. EPA Standard. From the result, the average air change rate per hour (ACH) in the WiSC was 0.598 +/-0.049 ACH while an average R was 0.961.The minimum air change rate was 0.549 ACH while 0.647 ACH was the maximum. The ventilation rates calculated was 1.983 L/s per person for 23.04m2 with four occupants. Mean while, the air temperature was in the range of 23.2~C to 25.4℃ and maximum CO2 and CO gases concentration are 836 ppm and 15.80 ppm respectively. As a conclusion the ventilation rates inside WiSC was determine. For further study for many types of building, a wide of data collection is needed. Weather changes and type of mechanical ventilation system used has to take into careful attention. The implication of this study is, for next experiment that involving other type of encloses building this method can be carried out with an improvement of the tracer gas method.
IAQ WiSC Ventilation Rates Tracer Gas
Adnan Husain Mohamad Zainal Md Yusof Nurul Zakiah Zamri Ishak Mohd Basir Abdul Mutalib Leman
Faculty of Mechanical and Manufacturing Engineering,University of Tun Hussein Onn Malaysia (UTHM),Locked Bag 101,86400 Parit Raja,Batu Pahat,Johor,Malaysia
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
957-964
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）