| 英文摘要 |
The testing system simulating a stack is composed of an inlet filtration unit, a 15 HP blower, a 13.4 m height, 60 cm diameter stainless steel duck, and an outlet filtration (bag house collector). Three levels of velocity and three levels of dust feeding rate were chosen for operational conditions in this project year. Thirty-Two private certified laboratories were invited and randomly assigned to 2 out of 9 conditions.
The main objective of the present study is to operate a pilot stack system to keep on establishing a database of measurements of stationary sources. This database was subject to further statistical analysis for performance proficiency. Other objective is to improve, operate and maintain a device (simulating a stack) for validating the measurement of particulate from stationary sources. To Produce unknown dust concentrations for evaluate the sampling performance of the private certified laboratories by the statistical analysis model of the 2001 and 2002 year. Generating different kinds and aerosol concentrations in the laboratory to evaluate number, surface, volume and mass concentrations.
The results showed that a statistical model of aerosol was derived and found to be able to explain over 85% of the variation in this year, this indicated that the ability of stack particulate measurements in this year may be higher than last year for private certified laboratories. Certified laboratories need to make a strengthen training and education about stack sampling. Furthermore, aerosol particles of the same mass concentration may have different opacity readings primarily due to the difference in size distribution. Therefore, aerosol size distribution of emitted particulate matter needs to be considered if opacity meter is to be used as the continuous emission monitor.
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