請用此 Handle URI 來引用此文件:
http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/70980
標題: | 冰霧系統於環境粉塵去除之最佳化分析 Optimization Analysis of Environmental Dust-Removal Applied in Cooling Fogging Systems |
作者: | Yung-Cheng Chuang 莊詠誠 |
指導教授: | 陳希立 |
關鍵字: | 冰霧系統,除塵,降溫,田口方法,灰關聯分析,溫濕度指數, Cooling Fogging System,Dust-Removal,Ambient Cooling,Taguchi method,Grey relational analysis,Temperature-Humidity Index (THI), |
出版年 : | 2018 |
學位: | 碩士 |
摘要: | 使用噴霧方法進行環境除塵或降溫等應用案例中,常見的型式為採用常溫水進行噴霧,此作法若應用在通風設計不良的廠區中,更會使環境相對濕度過高的缺點暴露出來,對於勞工的人體舒適度而言,也將會因此大打折扣。
本研究利用以冰霧主機為主體之冰霧系統進行除塵的實驗規劃,針對冰霧系統的噴嘴數量、水箱溫度、風扇轉速、供水壓力及噴嘴口徑之參數改變,探討各參數對於粉塵濃度、耗能及人體舒適度的影響,然而,為了達到冰霧系統運作的參數最佳化目的,因此利用實驗設計法中的田口方法結合灰關聯分析方法進一步分析,結果顯示噴嘴數量參數對於冰霧系統參數最佳化分析中有71.44%的貢獻度,同時求出冰霧系統的最佳參數組合為:噴嘴數量3 4、水箱溫度5℃、風扇轉速1575rpm及供水壓力100kgf/cm2,且其實際灰關聯度與預測值的相對誤差僅2.27%。 若僅選定總粉塵去除率做為單一評估考量時,水箱溫度參數對於粉塵去除率影響並不顯著,但對於人體舒適程度而言,水箱溫度的改變則會有很大的差異,以溫濕度指數THI為例,使用5℃冰水相較於26℃常溫水會有3倍的下降幅度,顯示出當使用5℃冰水進行噴霧應用時,對於勞工作業環境有更顯著的改善。 In some applications by using spraying method for dust removal or ambient cooling, spraying by using ambient temperature water is the most common method, however, when we implement this method on poorly designed ventilation plant, it will expose the disadvantages of high relative humidity in the ambient; moreover, it may causes human comfort getting worse for workers. This study is using cooling fogging system for dust-removal experiment, the change of parameters on cooling fogging system, including the number of spray nozzles, the temperature of water tank, the rotating speed of fan, the pressure of water supply and the caliber of spray nozzle, and then discuss the effect of dust concentration, energy consumption and human comfort by the change of parameters. Furthermore, we use the Taguchi method and grey relational analysis to testify and result in order to optimize the results of cooling fogging system. According to the result indicates that the contribution of the number of spray nozzle is up to 71.44%, and the result can be found by the optimal combination of parameters is the number of spray nozzles: 3 4, the water tank temperature of 5℃, the fan rotating speed of 1575rpm, the water supply pressure of 100 kgf/cm2. Thus, the relatively error of the actual grey relation grade and the predicted value is only 2.27%. If only choose total dust-removal rate for consideration, the parameter of water tank temperature which is no significant effect on total dust-removal rate; however, there is obviously different while changing the temperature of water tank for human comfort. Take THI(temperature-humidity index) for example, the change of THI by using low temperature water at 5℃ for spraying which is 3 times better than using ambient temperature water at 26℃ for spraying; in summary, it indicates that working environment condition is much more improved by using low temperature at 5℃ for spraying application than using ambient temperature water at 26℃. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/70980 |
DOI: | 10.6342/NTU201802268 |
全文授權: | 有償授權 |
顯示於系所單位: | 機械工程學系 |
文件中的檔案:
檔案 | 大小 | 格式 | |
---|---|---|---|
ntu-107-1.pdf 目前未授權公開取用 | 2.34 MB | Adobe PDF |
系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。