111年「排放管道中粒狀污染物檢測技術評鑑績效評估計畫」
| 中文摘要 | 檢測結果的正確與否會影響到政策的實行、收費的公平性以及裁罰的公正性，因此檢測業者必須能夠提供真實可靠的檢測數值。能力試驗是用來評估檢測業者能力的常見方式，本計畫藉由模擬煙道的設置，來評估國內檢測業者的能力，並建立數學模式來預測不同條件下的標準值，藉此提升檢測業者水準以及找出誤差來源。 模擬煙道內徑為60 cm，可穩定產生3–16 m/s與4–300 mg/Nm3的比測條件。每次比測皆進行三次風速、兩次粒狀物與一次氣體組成測試。本年度工作項目包括維護保養校正，例行性的比測，建立111年度模式以及歷年資料評估。另外也評估直接秤重法與洗液法對樣品回收的效率，以及粒狀污染物檢測量測不確定度之可行性研析。 模擬煙道經保養維護校正後，表現與往年相同。今年度共完成23次比測作業，比測結果整合以往資料建立新的風速與質量濃度模式、歷年分數以及合格率比較。直接秤重法與洗液法在微粒與洗液不起反應的情況下，對樣品回收結果沒有差別，但建議使用直接秤重法來避免誤差。Top-down方法能夠包含人為誤差，而Bottom-up方法能夠分析各個不確定度來源，以方法的角度來說，Top-down是包含所有的誤差來源，而Bottom-up則是專注於評估儀器設備規格與校正帶來的不確定度。 | ||
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| 中文關鍵字 | 粒狀物採樣、排放管道、不確定度 | ||
基本資訊
| 專案計畫編號 | 經費年度 | 110 | 計畫經費 | 1900 千元 | |
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| 專案開始日期 | 2022/01/27 | 專案結束日期 | 2022/12/31 | 專案主持人 | 黃盛修修 |
| 主辦單位 | 環檢所 | 承辦人 | 龔聖祐 | 執行單位 | 國立臺灣大學 |
成果下載
| 類型 | 檔名 | 檔案大小 | 說明 |
|---|---|---|---|
| 期末報告 | 111年「排放管道中粒狀污染物檢測技術評鑑績效評估計畫」期末報告定稿20221223.pdf | 11MB | 期末報告定稿 |
The evaluation program of stack PM measurement and proficiency performance
| 英文摘要 | The enforcement of the policy, justice of punishment, and the fairness of the emission fee depend on the quality of the testing results. Hence, testing companies should provide accredited measurements. The proficiency test is a common way to evaluate the quality of the testing companies. This project develops a simulation stack to enforce proficiency tests and a math model to predict the standard value of the stack. It also improves testing companies' testing ability and can determine the source of bias. The stack is 60 cm in diameter and can provide a testing velocity of 3 – 16 m/s and a mass concentration of 4 -300 mg/Nm3. The test comprises three velocities, two mass concentrations, and one gas composition. The working items include maintenance, calibration, routine tests, model development, and historical data evaluation. The direct weighting method and liquid washing method for sample recovery and the feasibility of the A101 method uncertainty are evaluated in this study, too. The repair, maintenance, and calibration were completed, and the performance of the stack was similar to previous testing parameters. Twenty-three proficiency tests had been completed. The new velocity and mass concentration models were established with new and historical data. The historical score analysis and qualified ratio in each year were also analyzed. The direct weighing method is suggested to avoid the reaction between particles and liquid. The Top-down method includes human error, and the Bottom-up method is capable of analyzing the sources of the bias. From the viewpoint of a method, the Top-down method can be used to evaluate all sources of bias, and the Bottom-down method can be used to evaluate the uncertainty caused by instrument calibration, specification, and resolution. | ||
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| 英文關鍵字 | PM sampling, Stack, Uncertainty | ||