【摘要】：低溫供暖技術(shù)是近年來逐漸推廣的供暖新趨勢，與傳統(tǒng)的高溫供暖方式相比,具有低能耗、高舒適性的特點。隨著供回水溫度的降低，供暖末端裝置勢必要有相應的變化，需具備更優(yōu)的傳熱特性。因此，可將重力式熱管這種高效傳熱元件應用于建筑一體化供暖系統(tǒng)中，達到以低耗能取得較為滿意的室內(nèi)熱環(huán)境的效果。 本課題對重力式熱管與墻體結(jié)合的散熱裝置展開研究。首先對重力式熱管的傳熱模式進行分析，分別建立其與戶內(nèi)內(nèi)墻、戶間隔墻及外墻相結(jié)合的重力式熱管散熱裝置的物理模型和數(shù)學模型。其次使用Matlab對不同供回水平均溫度下各形式傳熱模型的壁面溫度分布及散熱量進行模擬計算。最后通過實驗，分別測得散熱器明裝、混凝土覆蓋、模擬內(nèi)墻及同熱流密度外墻的單位面積散熱量，用實驗結(jié)果驗證模擬計算方法的可靠性及準確性。 通過調(diào)整與戶內(nèi)內(nèi)墻結(jié)合的重力式熱管散熱裝置雙側(cè)粉飾層的厚度比，可靈活實現(xiàn)內(nèi)墻對不同負荷的雙側(cè)房間同時供暖；與外墻結(jié)合的重力式熱管散熱裝置隨著供回水平均溫度升高，散熱損失百分下降；在外墻加設(shè)內(nèi)保溫層時，散熱損失量明顯減少。實驗表明：當過余溫度為64.5℃、供回水溫差為13℃時，安裝每平米重力式熱管散熱器的散熱量為1419.2W。相同過余溫度下，，該散熱裝置可不考慮流量對散熱量的影響。保證與熱管結(jié)合的墻體的各個構(gòu)造層厚度一致，墻體表面就會有很好的溫度均勻性。最后通過對實驗數(shù)據(jù)的整理歸納，結(jié)合模擬計算給出溴鋰-碳鋼重力式熱管散熱裝置的使用推薦表，為其工程應用提供參考依據(jù)。 本論文為“十二五”國家科技支撐計劃課題“嚴寒地區(qū)供熱系統(tǒng)節(jié)能降耗關(guān)鍵技術(shù)研究與工程示范”（2011BAJ05B04）的部分研究內(nèi)容。
[Abstract]:Low temperature heating technology is a new trend of heating which is gradually popularized in recent years. Compared with the traditional high temperature heating method, it has the characteristics of low energy consumption and high comfort. With the decrease of the temperature of water supply and return water, the heating terminal equipment must have corresponding changes, and it needs to have better heat transfer characteristics. Therefore, gravity heat pipe, which is an efficient heat transfer element, can be applied to the integrated building heating system to achieve a satisfactory indoor thermal environment with low energy consumption. In this paper, the heat dissipation device of gravity heat pipe combined with wall is studied. Firstly, the heat transfer model of gravity heat pipe is analyzed, and the physical model and mathematical model of gravity heat pipe heat dissipation device are established, which are combined with interior wall, indoor wall and external wall respectively. Secondly, Matlab is used to simulate the wall temperature distribution and heat dissipation of various heat transfer models under different average temperature of water supply and return water. Finally, the unit area heat emission of radiator, concrete covering, simulating inner wall and external wall with same heat flux are measured by experiments, and the reliability and accuracy of the simulation calculation method are verified by the experimental results. By adjusting the thickness ratio of the double side whitewash layer of the gravity heat pipe heat dissipation device combined with the interior wall, it can flexibly realize the simultaneous heating of the inner wall to the bilateral rooms with different loads. The heat dissipation loss of gravity heat pipe combined with external wall decreases with the increase of the average temperature of water supply and backwater, and the heat loss decreases obviously when the inner insulation layer is added to the external wall. The experimental results show that when the excess temperature is 64.5 鈩

本文編號：2400989