發(fā)布時間：2018-05-28 05:12

  本文選題：夏熱冬冷地區(qū) + 雙層通風(fēng)幕墻��； 參考：《湖南工業(yè)大學(xué)》2016年碩士論文

【摘要】：雙層通風(fēng)幕墻(Double Skin Fa?ade,以下簡稱DSF)作為一種近些年不斷發(fā)展的建筑外圍護(hù)結(jié)構(gòu),已經(jīng)給人們留下了深刻的印象,其外觀滿足人們對于美學(xué)的追求,良好的通透性也能夠滿足室內(nèi)采光的需要,最重要的是在提高熱工性能方面具有較大潛力,特別是在我國夏熱冬冷地區(qū),如果合理的布置進(jìn)出風(fēng)口的開合情況,就可以有效的減小夏季的制冷能耗和冬季的采暖能耗。然而,DSF的傳熱過程非常復(fù)雜,要想設(shè)計出適應(yīng)當(dāng)?shù)貧夂虻腄SF,需要對DSF熱通道內(nèi)的熱工性能有全面的認(rèn)識。本文首先運用理論分析的方法,深入研究分析了DSF的傳熱過程,建立了DSF的動態(tài)傳熱模型,列出了每一分界面上的熱平衡方程;同時介紹了DSF熱通道內(nèi)自然通風(fēng)的形成原因,指出熱通道高度是影響DSF自然通風(fēng)的重要因素。借助CFD模擬軟件和WINDOW軟件對夏季工況下外循環(huán)式DSF進(jìn)行模擬研究,采用太陽加載模型來模擬不同時刻的太陽輻射強度、太陽高度角和太陽方位角,得出在夏季輻射強度較大的白天時段內(nèi),熱通道的動態(tài)隔熱效率基本能達(dá)到90%以上,能夠有效的降低熱通道內(nèi)的高溫對室內(nèi)環(huán)境的熱擾動。運用數(shù)值模擬的方法,從遮陽百葉位置、遮陽百葉傾角和熱通道間距3個方面對DSF的結(jié)構(gòu)參數(shù)進(jìn)行優(yōu)化,結(jié)果表明熱通道間距對DSF的傳熱性能影響最大。最后,以2016年2月29日為實驗日,將實驗結(jié)果與數(shù)值模擬結(jié)果進(jìn)行對比分析,指出本文所建立數(shù)學(xué)模型對預(yù)測DSF溫度分布趨勢方面具有一定可靠性,但是模擬值與實驗值之間存在誤差,通過分析總結(jié)出了造成誤差的幾點原因。本文在DSF的原理與性能上做了分析,同時結(jié)合數(shù)值模擬與實驗,研究了DSF熱通道內(nèi)的非穩(wěn)態(tài)熱特性,對夏熱冬冷地區(qū)DSF的性能分析和優(yōu)化設(shè)計具有一定的參考意義。
[Abstract]:Double Skin facade (DSF), as a kind of building envelope structure which has been developing in recent years, has left a deep impression on people, and its appearance satisfies people's pursuit of aesthetics. Good permeability can also meet the needs of indoor lighting. The most important thing is that it has great potential in improving thermal performance, especially in the hot summer and cold winter areas of China, if the opening and closing of the air inlet is reasonably arranged. It can effectively reduce the cooling energy consumption in summer and heating energy consumption in winter. However, the heat transfer process of DSF is very complex. To design DSFs adapted to local climate, it is necessary to have a comprehensive understanding of the thermal properties of DSF heat channels. In this paper, the heat transfer process of DSF is studied and analyzed by the method of theoretical analysis, the dynamic heat transfer model of DSF is established, the heat balance equation at each interface is listed, and the reasons for the formation of natural ventilation in DSF heat channel are introduced. It is pointed out that the heat channel height is an important factor affecting the natural ventilation of DSF. With the help of CFD simulation software and WINDOW software, the external circulation DSF is simulated in summer. The solar radiation intensity, solar height angle and solar azimuth at different times are simulated by solar loading model. It is concluded that the dynamic thermal insulation efficiency of the heat channel can reach more than 90% during the daytime period when the summer radiation intensity is large, which can effectively reduce the thermal disturbance caused by the high temperature in the heat channel to the indoor environment. The structural parameters of DSF were optimized by numerical simulation from three aspects: the position of sunshade blinds, the obliquity of sunshade blinds and the distance between heat channels. The results show that the distance between heat channels has the greatest influence on the heat transfer performance of DSF. Finally, taking February 29, 2016 as the experimental day, the experimental results and the numerical simulation results are compared and analyzed. It is pointed out that the mathematical model established in this paper is reliable in predicting the trend of DSF temperature distribution. However, there are some errors between the simulated value and the experimental value. In this paper, the principle and performance of DSF are analyzed. At the same time, combined with numerical simulation and experiment, the unsteady-state thermal characteristics of DSF heat channel are studied, which has some reference significance for the performance analysis and optimization design of DSF in hot summer and cold winter area.
【學(xué)位授予單位】：湖南工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TU227;TU834

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本文編號：1945422