發(fā)布時(shí)間：2018-04-14 13:29

  本文選題：工業(yè)廠房 + 自然通風(fēng)　； 參考：《華中科技大學(xué)》2014年碩士論文

【摘要】：目前，我國工業(yè)化程度正處在高速發(fā)展的時(shí)期，伴隨著工業(yè)化發(fā)展的不斷進(jìn)步，全國工廠、企業(yè)的生產(chǎn)規(guī)模也在不斷擴(kuò)大，與此同時(shí)，企業(yè)必須大規(guī)模新建或改造廠房以滿足生產(chǎn)要求，這就導(dǎo)致工業(yè)廠房的數(shù)量不斷增多，體積不斷加大，結(jié)構(gòu)也變得越來越復(fù)雜。工業(yè)廠房主要問題有兩個，耗能大與環(huán)境差，廠房在生產(chǎn)過程中會排放大量的熱量、有害氣體，不僅直接影響到工人的健康、設(shè)備的使用壽命，嚴(yán)重的也會影響到生產(chǎn)的正常運(yùn)行。這就需要工業(yè)廠房配備良好的通風(fēng)系統(tǒng)，節(jié)能降耗的同時(shí)，盡可能的提高其通風(fēng)效率，構(gòu)建良好的工作環(huán)境。 通風(fēng)系統(tǒng)可分為機(jī)械通風(fēng)系統(tǒng)和自然通風(fēng)系統(tǒng)，機(jī)械通風(fēng)系統(tǒng)效率高、穩(wěn)定性強(qiáng)，但耗能較大；自然通風(fēng)系統(tǒng)無需消耗動力，能夠?qū)崿F(xiàn)工業(yè)廠房節(jié)能降耗的目的，但是通風(fēng)效率低的缺點(diǎn)無法保證廠房能夠保持較好的環(huán)境，因此本課題提出對工業(yè)廠房自然通風(fēng)系統(tǒng)進(jìn)行優(yōu)化改造，保證廠房節(jié)能降耗的同時(shí)，保持較好的環(huán)境。本課題以鋼鐵工業(yè)大型廠房為研究對象，通過對自然通風(fēng)系統(tǒng)中傳統(tǒng)排風(fēng)方式的分析與研究，對排風(fēng)氣樓的位置、形狀以及排風(fēng)方式進(jìn)行合理的改進(jìn)與優(yōu)化，提出三種改造方案，分別是提高氣樓高度、排風(fēng)氣樓后移、氣樓橫向布置，通過對改造前后廠房內(nèi)部主要工作區(qū)域溫度分布的對比與分析，，可以明顯的看到改造后廠房內(nèi)部溫度有了明顯的降低，環(huán)境得到改善，驗(yàn)證了三種改造方案的可行性。隨后，我們還將三種改造方案結(jié)合到一起的綜合方案進(jìn)行模擬與分析，得到更好的優(yōu)化效果，驗(yàn)證了三種改造方案的合理性、獨(dú)立性與互補(bǔ)性，將三種改造方案進(jìn)行合理的配合，可以更好的優(yōu)化效果。 本課題主要采用CFD（計(jì)算流體動力學(xué)）方法對廠房建立模型，設(shè)置相關(guān)條件與參數(shù)，求解器進(jìn)行求解，完成自然通風(fēng)過程數(shù)值模擬，對空氣在廠房內(nèi)部的流動狀態(tài)與相關(guān)參數(shù)進(jìn)行分析，為工業(yè)廠房通風(fēng)系統(tǒng)的優(yōu)化設(shè)計(jì)提供了科學(xué)的理論依據(jù)與行之有效的實(shí)施方法。
[Abstract]:At present, the degree of industrialization in our country is in a period of rapid development. With the continuous progress of industrialization, the scale of production of factories and enterprises throughout the country is also expanding, at the same time,Enterprises must build or transform factories on a large scale to meet the requirements of production, which leads to the increasing number, volume and structure of industrial buildings.There are two main problems in industrial buildings, which are energy consumption and poor environment. The factory buildings will emit a lot of heat and harmful gases during the production process, which will not only directly affect the health of workers and the service life of equipment,Serious also can affect the normal operation of production.It is necessary for industrial buildings to be equipped with good ventilation system, to save energy and reduce consumption, to improve ventilation efficiency as much as possible, and to build a good working environment.Ventilation system can be divided into mechanical ventilation system and natural ventilation system. Mechanical ventilation system has high efficiency, strong stability, but large energy consumption.However, the shortcomings of low ventilation efficiency can not ensure that the workshop can maintain a better environment, so this paper proposes to optimize the natural ventilation system of industrial buildings to ensure energy saving and consumption reduction, while maintaining a better environment.This topic takes the iron and steel industry large-scale workshop as the research object, through the analysis and the research to the traditional exhaust air way in the natural ventilation system, carries on the reasonable improvement and the optimization to the exhaust air tower position, the shape and the exhaust air way.Three retrofit schemes are put forward, which are to raise the height of the gas tower, to move the exhaust gas tower backward, and to arrange the air tower laterally. Through the comparison and analysis of the temperature distribution in the main working area of the factory before and after the renovation,It can be seen that the internal temperature of the plant has been obviously reduced and the environment has been improved after the transformation, which verifies the feasibility of the three retrofit schemes.After that, we simulate and analyze the three kinds of reconstruction schemes, and obtain better optimization results, which verify the rationality, independence and complementarity of the three transformation schemes.The optimization effect can be improved by the reasonable cooperation of the three transformation schemes.In this paper, CFDs (Computational fluid Dynamics) method is used to establish the model of the workshop, set up the relevant conditions and parameters, solve the problem with solver, and complete the numerical simulation of the natural ventilation process.The flow state and related parameters of the air in the factory building are analyzed, which provides a scientific theoretical basis and an effective implementation method for the optimization design of the ventilation system of the industrial factory building.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU834.53

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