本文選題：分離式發(fā)生器 + 泡沫金屬��； 參考：《河北科技大學(xué)》2016年碩士論文

【摘要】：以余熱作為熱源的熱管型分離式發(fā)生器,以其節(jié)能環(huán)保的優(yōu)點(diǎn)得到國內(nèi)外學(xué)者的廣泛關(guān)注。為了進(jìn)一步增強(qiáng)傳熱,在熱管中填充了泡沫金屬。但是,泡沫金屬的填充量對傳熱效率影響重大。所以,本文對基于泡沫金屬的熱管型發(fā)生器傳熱性能進(jìn)行了研究。本文分別選取泡沫銅和水作為熱管的填充材料和工質(zhì),以分離式熱管型溴化鋰發(fā)生器熱管內(nèi)填充的泡沫銅的長度和位置為究對象。首先,通過FUENT中設(shè)置熱管出口水蒸汽溫度和內(nèi)部水蒸氣的體積分?jǐn)?shù)監(jiān)視器得到二者的數(shù)據(jù),當(dāng)填充位置不變時(shí),隨著填充長度的增加,出口溫度先減小后增大,氣相率則先急劇增加然后減小,再增加的趨勢,而當(dāng)填充長度不變時(shí),隨著泡沫銅填充位置的上移,熱管出口溫度先增大然后減小,氣相率先增加然后緩慢減小,再急劇增加;其次,通過理論推導(dǎo)并結(jié)合Origin軟件擬合分別得到換熱量與泡沫銅填充長度、填充位置的函數(shù)關(guān)系式,并通過MATLAB的黃金分割法確定上述兩個(gè)公式的最優(yōu)解;最后,將公式應(yīng)用到冷凝段,利用FLUENT模擬其換熱并與沒有填充泡沫銅的對照組進(jìn)行對比。本文研究結(jié)果表明從熱管底部開始填充長度為334mm的泡沫銅時(shí),其強(qiáng)化傳熱效果最佳,且公式應(yīng)用于冷凝段所得換熱性能明顯優(yōu)于對照組。本文的分析方法及結(jié)果,為基于泡沫金屬的分離式熱管型發(fā)生器的優(yōu)化設(shè)計(jì)提供了重要參考依據(jù)。
[Abstract]:The heat pipe type separation generator with waste heat as heat source has been widely concerned by scholars at home and abroad for its advantages of energy saving and environmental protection. To further enhance heat transfer, the heat pipe is filled with foam metal. However, the amount of foam metal filling has a great influence on heat transfer efficiency. Therefore, the heat transfer performance of heat pipe generator based on foam metal is studied in this paper. In this paper, foam copper and water are selected as filling materials and working fluids of heat pipe, and the length and position of copper foam filled in heat pipe of separated heat pipe type lithium bromide generator are studied. First of all, the data of the heat pipe outlet water vapor temperature and the volume fraction of the internal water vapor are obtained by setting the heat pipe outlet steam temperature and the volume fraction of the internal water vapor in the heat pipe. When the filling position is constant, the outlet temperature decreases first and then increases with the increase of the filling length. When the filling length is constant, the exit temperature of heat pipe increases first and then decreases with the moving of the filling position of copper foam. The gas phase increases first and then decreases slowly, and then increases sharply. Secondly, through theoretical derivation and combining with Origin software fitting, the function relationship between heat transfer and filling length, filling position of copper foam is obtained, and the optimal solution of the above two formulas is determined by the golden section method of MATLAB. The formula was applied to the condensation section and the heat transfer was simulated by fluent and compared with the control group without copper foam. The results show that the heat transfer enhancement effect is the best when the foam copper with 334mm length is filled from the bottom of the heat pipe, and the heat transfer performance of the formula applied to the condensing section is obviously better than that of the control group. The analytical methods and results in this paper provide an important reference for the optimization design of separated heat pipe generator based on foam metal.
【學(xué)位授予單位】：河北科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TK172.4

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本文編號：1999102