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標題: | 複合除濕材料結合銅管性能研究 Performance Investigation and Analysis of Composite Desiccant Materials Combined with Copper Tubes |
作者: | Sheng-Yi Wu 吳昇益 |
指導教授: | 陳希立(Sih-Li Chen) |
關鍵字: | 除濕材料,複合材料,銅管,吸附熱,冷卻溫度,低壓降, dehumidification material,composite desiccant,copper tube,adsorption heat,cooling temperature,low pressure drop, |
出版年 : | 2020 |
學位: | 碩士 |
摘要: | 本研究目的在改善複合除濕材料吸附水氣時,因為氣態水凝結成液態水產生的吸附熱,因為材料處在積熱情況下會降低整體吸附能力,同時 吸附床出口產生溫升則會增加空調對於顯熱的額外負載。研究中使用常見的藍矽膠、活性氧化鋁、海藻酸鈉作為主材料,並加入聚丙烯酸、聚丙烯酸鈉、海藻酸鈉等高分子材料作為輔助材料進行複合過程再經由成型性測試後選定藍矽膠與活性氧化鋁作為後續實驗主材料,而後將銅管置入所選定的兩種複合材料中進行測試。實驗測試制定在不同相對濕度下的未通水材料進行試驗 實驗結果發現藍矽膠複合材料具有較高吸附能力,因此後續針對銅管內形式變化以藍矽膠為固定材料進行更動,同時吸附條件使用最接近夏季台灣天氣的溫度30℃,相對濕度70%作為固定參數。針對置入的銅管類型設計了彎管與雙直管結合鋁片等兩種不同形式的銅管,同樣進行週期式吸脫附的性能比較。由實驗結果顯示,使用雙直管結合鋁片形式的複合材料具有最高的除濕性能,在吸附條件為溫度 30℃與相對濕度70%下,銅管內通入16度水,相較使用彎管形式的複合材料總吸附量提升約32%,而直管結合鋁片形式的兩根直管管內流向的不同也導致吸附能力有所差異,使用逆向流形式比同向流形式增加約 2克的總吸附量。 The purpose of this study is to improve adsorption heat generated by the composite desiccant while absorbing water vapor, because the composite desiccant reduces the adsorption capacity under the condition A t the same time , it will generate a temperature rise at the outlet of the adsorption bed . Temperature rise will increase the additional load of the air conditioner.In the study,Silica Gel and Activated Alumina were used as the base material, and polymer materials such as Polyacrylic Acid, sodium Polya crylate, and Sodium Alginate were added. Then , the copper tube was placed into the composite desiccant.By entering low temperature water to reduce the temperature rise. In the experimental test, the two types composite desiccant were combined with copper tubes to test absorption and desorption performance under different relative humidity, and then composite desiccant based on Silica Gel with higher adsorption capacity was selected for cycle dehumidifying test .In addition to different types of composite desiccant,different types of copper tubes form , such as elbows and double straight tubes combined with aluminum sheets, were designed for the test. The performance of periodicsuction and desorption was also compared. The experimental results show that the composite material in the form of a double straight tube combined with an aluminum sheet has the highest dehumidification performance. Under the adsorption condition of 30 and 70% relative humidity, 16 degrees of water is passed into the copper tube, compared with the use of the bent tube The total adsorption capacity of the composite material increased by about 32%. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57184 |
DOI: | 10.6342/NTU202001733 |
全文授權: | 有償授權 |
顯示於系所單位: | 機械工程學系 |
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