【摘要】：我國能源的開發(fā)和利用一直是科研人員重點關注的問題之一,也是關系我國社會主義可持續(xù)發(fā)展以及人們生活質量提高的關鍵因素。隨著舊能源的大規(guī)模使用和新能源的不斷開發(fā),這同時也會造成能源的大量浪費不合理的使用,所以能源的節(jié)約這項技術的研究已是刻不容緩。相變儲能技術作為新型的節(jié)能技術之一,它有著自身獨特處理熱能和如何有效的使用存儲的能力。相變儲能材料對能量的存儲方式主要是指隨著環(huán)境溫度的變化,材料的狀態(tài)會發(fā)生相變,同時從環(huán)境中吸收或釋放出熱量的過程。本文主要針對德固薩材料相變石蠟RT28在建筑墻體中的節(jié)能效果進行研究。本次研究就是為了制備出適合建筑墻體節(jié)能使用的相變材料,然后通過實驗測試和軟件模擬的方式檢驗其儲能效果。本文在緒論部分對相變儲能材料的發(fā)展現(xiàn)狀進行了綜述說明,對材料的分類和特點分別進行分析。然后選取了相變石蠟RT28作為本文研究的相變儲能材料,采用微膠囊技術對材料進行封裝。采用差式量熱掃描儀(DSC)對相變石蠟RT28進行了熱物性能的測試,包括材料的相變溫度、比熱容、耐久性、相變焓等。發(fā)現(xiàn)所制備的膠囊狀RT28符合相變材料的條件,而且采用微膠囊技術對材料的蓄熱能力有所提高。為了檢測相變石蠟RT28的實際節(jié)能效果,本次研究結合阜陽某公司對相變儲能墻體進行了應用測試。實驗臺的搭建采用相似性的原理,將相變石蠟RT28加入蒸壓加氣混凝土的墻體,與普通的墻體進行比較。實驗結果顯示,與沒有加入相變材料的普通墻體對比,添加了相變石蠟RT28的墻體最高溫度降低大約2℃,同時節(jié)能大約9%,而且能夠有效的降低房間溫度的變化幅度,還可以加強蒸壓加氣混凝土的性能。最后用有限元分析軟件ANSYS對墻體進行傳熱模擬,分別對加入了相變石蠟RT28的墻體和普通墻體的表面溫度隨環(huán)境溫度變化的情況進行模擬。模擬分析的數據與實驗測試的數據最大誤差不超過2%,符合要求。本文對相變儲能墻體分別建立數學和物理模型,為相變材料的進一步應用研究提供有價值的資料。
[Abstract]:The development and utilization of energy in China has always been one of the key issues paid close attention to by scientific researchers. It is also a key factor related to the sustainable development of socialism and the improvement of people's quality of life. With the large-scale use of old energy and the continuous development of new energy, it will also lead to a large number of energy waste unreasonable use, so energy conservation this technology is urgent. As one of the new energy saving technologies, phase change energy storage technology has its own unique ability to deal with heat energy and how to use storage effectively. The energy storage mode of phase change energy storage material mainly refers to the process that the state of the material changes with the change of ambient temperature, and the heat is absorbed or released from the environment at the same time. In this paper, the energy-saving effect of phase-change paraffin RT28 in building wall is studied. The purpose of this study is to prepare phase change material suitable for building wall energy saving, and then test its energy storage effect by means of experimental test and software simulation. In the introduction part, the development of phase change energy storage materials is reviewed, and the classification and characteristics of the materials are analyzed. Then the phase change paraffin RT28 was selected as the phase change energy storage material studied in this paper, and the microencapsulation technology was used to encapsulate the material. The thermal properties of phase change paraffin wax (RT28) were measured by differential calorimeter (DSC), including phase transition temperature, specific heat capacity, durability and enthalpy of phase transition. It was found that the encapsulated RT28 conformed to the condition of phase change material, and the heat storage ability of the material was improved by using microencapsulation technology. In order to test the energy saving effect of phase change paraffin wax (RT28), the application test of phase change storage wall was carried out by a company in Fuyang. The principle of similarity is adopted in the construction of the test bench, and the phase change paraffin RT28 is added to the autoclaved aerated concrete wall, and compared with the ordinary wall. The experimental results show that compared with the ordinary wall without phase change material, the maximum temperature of the wall with phase change paraffin RT28 is reduced by about 2 鈩，

本文編號：2179184