本文選題：高溫熱害　切入點：礦井降溫　出處：《武漢紡織大學》2015年碩士論文　論文類型：學位論文

【摘要】：礦井高溫熱害是指礦井內(nèi)環(huán)境氣溫超過人體正常熱平衡所能忍受的溫度,這會引起工人勞動效率降低,井下安全隱患增加,工人身體健康受到威脅等問題�，F(xiàn)有的礦井整體降溫方式存在成本高、管路易堵塞等缺點,而現(xiàn)有的局部降溫方式雖然成本低,但還存在安全隱患和降溫效果較差等缺點。為研發(fā)新型低成本高效礦井局部降溫裝置,本文針對所提出的基于渦輪膨脹制冷原理的局部降溫系統(tǒng),系統(tǒng)分析了該系統(tǒng)的組成、原理和降溫特性,同時對與該系統(tǒng)尾部相連的關鍵部件—冷熱風混合裝置內(nèi)的冷熱風混合過程進行了數(shù)值模擬研究,為后續(xù)該設備的優(yōu)化提供參考。論文主要做了以下工作:(1)在所提出的渦輪膨脹制冷機的基礎上,對該系統(tǒng)的組成、原理和降溫特性進行了系統(tǒng)分析和研究,結果表明該制冷方式是有效可行的,而且在煤礦這種特殊的易爆環(huán)境中使用起來比較安全。分析結果同時指出,與該局部降溫裝置尾部相連的冷熱風混合結構設計的優(yōu)劣,對最終吹到礦工周圍的氣流溫度具有很大影響,而目前對該混風結構的研究還較少,因此,需要對其內(nèi)部的混風過程進行詳細研究。(2)在建立斯托克斯方程組及k??湍流模型的基礎上,利用Fluent及gambit等相關軟件對上述混風裝置的溫度場和速度場進行計算和模擬,研究掘進入口處送風溫度和送風速度改變后,冷熱風混風裝置內(nèi)的氣流的溫度場和速度場的圖像以及變化趨勢。再結合渦輪膨脹風機式煤礦井下降溫系統(tǒng)的工作原理及礦井下工作環(huán)境的實際情況,結合模擬結果得出合適的送風溫度和送風速度。
[Abstract]:High temperature thermal damage in a mine means that the ambient temperature in the mine exceeds the temperature that the human body can tolerate in the normal heat balance. This will lead to a decrease in the labor efficiency of the workers and an increase in the hidden dangers of underground safety. Problems such as threats to the health of workers. The existing overall cooling mode of coal mines has the disadvantages of high cost and easy blockage of pipes, while the existing local cooling methods are low in cost, In order to develop a new type of low cost and high efficiency local cooling device, this paper systematically analyzes the composition of the local cooling system based on the principle of turbo expansion refrigeration. At the same time, the mixing process of cold and hot air in the cold and hot air mixing device, which is connected to the tail of the system, is numerically simulated. The main work of this paper is as follows: 1) on the basis of the proposed turbine expansion refrigerator, the composition, principle and cooling characteristics of the system are systematically analyzed and studied. The results show that the refrigeration method is effective and feasible, and it is safe to use in the coal mine, which is a special explosive environment. The results of the analysis also point out the merits and demerits of the design of the cold and hot air mixed structure connected to the tail of the local cooling device. It has a great influence on the air flow temperature around the miner, but there are few studies on the structure of the mixed air. Therefore, it is necessary to study the mixing process in detail in order to establish the Stokes equations and the K2 equations. ? On the basis of turbulence model, the temperature field and velocity field of the air mixing device are calculated and simulated by using Fluent and gambit software, and the change of air temperature and velocity at the entrance of drivage is studied. Image and trend of temperature field and velocity field of air flow in cold and hot air mixer. Combined with the working principle of underground cooling system of turbo expansion fan type coal mine and the actual situation of working environment under mine. Combined with the simulation results, the suitable air temperature and velocity are obtained.
【學位授予單位】：武漢紡織大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD727.2

【參考文獻】

相關期刊論文 前2條

1 黃壽元;侯玉強;吳冷峻;;礦井深部熱害分析及治理研究[J];現(xiàn)代礦業(yè);2011年10期

2 張皖生;吳正欣;;發(fā)展熱電冷聯(lián)供,實現(xiàn)煤礦節(jié)能減排[J];中國煤層氣;2009年02期

相關碩士學位論文 前2條

1 賈雪松;基于CFD的熱油管道數(shù)值模擬[D];大慶石油學院;2010年

2 楊海燕;某土房~(220)Rn的測量及平衡因子分布特征的研究[D];南華大學;2012年

，

本文編號：1574932