【摘要】：面對目前全球能源日益緊張、人居環(huán)境日益惡化的現(xiàn)狀，全世界都在開展節(jié)約能源的相關(guān)研究工作。相關(guān)研究表明，實現(xiàn)建筑節(jié)能的有效技術(shù)措施之一是圍護結(jié)構(gòu)的保溫隔熱性能，而墻體材料的的熱工性能又與圍護結(jié)構(gòu)的保溫隔熱息息相關(guān)。陜南地區(qū)頁巖資源豐富，當(dāng)?shù)貕w材料就地取材，以燒結(jié)頁巖多孔磚和空心磚為主，但是當(dāng)?shù)仨搸r磚的熱工性能及其應(yīng)用沒有相關(guān)研究資料，其保溫隔熱性能還有沒有可以改善的空間，目前的圍護結(jié)構(gòu)構(gòu)造是否滿足相關(guān)要求，針對以上問題，本文作以下研究： 首先利用Ansys軟件的fluent模塊，結(jié)合空氣間層傳熱特點，研究孔洞長寬比、孔排數(shù)和列數(shù)、排列方式等因素與頁巖磚導(dǎo)熱系數(shù)的關(guān)系，研究結(jié)果表明：增加矩型孔洞孔長寬比會提高多孔磚的保溫效果；提高孔洞率、增加孔的排列數(shù)及孔肋延長線系數(shù)，多孔磚的導(dǎo)熱系數(shù)都有不同程度的提高。市場上240mm115mm 90mm多孔磚模擬分析當(dāng)量導(dǎo)熱系數(shù)為0.46W/(m·K)，優(yōu)化設(shè)計后的多孔磚模擬分析的當(dāng)量導(dǎo)熱系數(shù)為0.43W/(m·K)，與市場多孔磚相比，，降低約6％。 實驗表明，對頁巖空心磚孔壁涂低輻射材料和填充保溫材料后，可降低磚體的當(dāng)量導(dǎo)熱系數(shù)。前者當(dāng)量導(dǎo)熱系數(shù)為0.50W/(m·K)，降低13.7%；后者當(dāng)量導(dǎo)熱系數(shù)為0.425W/(m·K)，降低26.7%。 論文選取陜南地區(qū)典型居住建筑為研究對象，結(jié)合實驗結(jié)果，依據(jù)陜南地區(qū)氣候特征，建立模擬計算模型，然后運用DeST-h軟件模擬計算相同外墻構(gòu)造下，不同外墻傳熱系數(shù)對建筑負(fù)荷的影響，提出外墻構(gòu)造優(yōu)化方案。 通過軟件模擬和實驗等方法，本文對陜南地區(qū)居住建筑墻體材料熱工性能及其應(yīng)用有了較為深入的認(rèn)識，并探索提高其保溫隔熱性能，論文的研究對頁巖磚的推廣及建筑節(jié)能具有一定的理論價值和現(xiàn)實意義。
[Abstract]:In the face of the global energy shortage and the worsening of the living environment, the research on energy conservation is being carried out all over the world. Related studies show that one of the effective technical measures for building energy saving is the thermal insulation performance of the envelope structure, and the thermal properties of the wall materials are closely related to the thermal insulation of the envelope structure. The area of southern Shaanxi is rich in shale resources, and the local wall materials are based on local materials, mainly sintered shale porous brick and hollow brick. However, there is no relevant research data on the thermal properties and application of local shale brick. In view of the above problems, this paper makes the following research: firstly, using the fluent module of Ansys software, there is no room for improvement of its thermal insulation performance, and whether the current structure of the enclosure structure meets the relevant requirements. Based on the heat transfer characteristics of the air interlayer, the relationship between the length to width ratio, the number of holes, the number of holes and the arrangement mode and the thermal conductivity of shale brick is studied. The results show that increasing the ratio of length to width of rectangular hole can improve the thermal insulation effect of porous brick. The thermal conductivity of porous brick can be improved in different degree by increasing the porosity, increasing the number of holes arranged and the coefficient of the lengthening line of the hole rib. The equivalent thermal conductivity of 240mm115mm 90mm porous brick is that of 0.46W/ (m K), optimized design. The equivalent thermal conductivity of the simulation analysis of porous brick with 0.46W/ (m K), is about 6% lower than that of porous brick in market. The experimental results show that the equivalent thermal conductivity of the shale hollow brick can be reduced by coating the hole wall with low radiation material and filling the insulating material. In the former, the equivalent thermal conductivity was reduced by 13.7% for 0.50W/ (m K), while the equivalent coefficient of thermal conductivity in the latter was reduced by 26.7g for 0.425W/ (m K),. In this paper, the typical residential buildings in southern Shaanxi are selected as the research objects, and according to the climate characteristics of the southern Shaanxi region, the simulation calculation model is established, and then the DeST-h software is used to simulate and calculate the same exterior wall structure. The influence of different external wall heat transfer coefficient on building load is put forward. By means of software simulation and experiment, this paper has a deeper understanding of the thermal properties and its application of wall materials for residential buildings in southern Shaanxi, and explores how to improve its thermal insulation performance. The research of this paper has certain theoretical value and practical significance for the promotion of shale brick and building energy conservation.
【學(xué)位授予單位】：西安建筑科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU502;TU111

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