燃?xì)庠顡躏L(fēng)節(jié)能罩的研究
發(fā)布時(shí)間：2018-03-24 04:30
本文選題：燃?xì)庠?/strong> 切入點(diǎn)：擋風(fēng)節(jié)能罩 出處：《青島理工大學(xué)》2013年碩士論文
【摘要】：全球工業(yè)化進(jìn)程的飛速發(fā)展，導(dǎo)致了能源的大量消耗，，能源緊缺問題也變得越來越明顯。雖然現(xiàn)在不斷開發(fā)新型能源的利用，但是作為能源主流的煤、石油、天然氣依然占據(jù)著全球能源的主導(dǎo)地位，而這三種主流能源都屬于非可再生資源。在不斷的消耗之下，其存儲量也越來越少，節(jié)能也就成為現(xiàn)階段社會發(fā)展的一個(gè)主題。 在我國，燃?xì)獾氖褂梅浅V泛，尤其是在家用燃?xì)庠罹叻矫娴氖褂谜紦?jù)了非常大的比例。燃?xì)庠钇骄鶡嵝首鳛楹饬咳細(xì)庠钊紵实闹饕笜?biāo)，我國現(xiàn)階段的大部分燃?xì)庠钇骄鶡嵝什⒉桓�，造成了大量的能源浪費(fèi)。為了順應(yīng)全球節(jié)能的社會大趨勢，對于提高燃?xì)庠畹钠骄鶡嵝恃芯恳苍诓粩嗌罨，F(xiàn)階段，對燃?xì)庠罹叩墓?jié)能研究主要在集中于開發(fā)設(shè)計(jì)新型結(jié)構(gòu)的燃?xì)庠詈腿細(xì)庠罡綄傺b置研究。本文對燃?xì)庠罡綄傺b置擋風(fēng)節(jié)能罩進(jìn)行研究，分析其節(jié)能特性，為開發(fā)節(jié)能效果更好的擋風(fēng)節(jié)能罩提供依據(jù)。 本文借助CFD軟件FLUENT對某一家用燃?xì)庠钤诓皇褂脫躏L(fēng)節(jié)能罩和使用鐵質(zhì)、陶瓷、高硅氧三種不同類型的擋風(fēng)節(jié)能罩進(jìn)行數(shù)值模擬計(jì)算，通過計(jì)算結(jié)果得到燃?xì)庠钊紵臻g在各種情況下的溫度場。利用FLUENT前期處理軟件GAMBIT，建立物理模型。由連續(xù)性方程、動量守恒方程、能量守恒方程、組分質(zhì)量傳輸方程、K方程和ε方程組成封閉的微分方程組，通過組分傳輸定義邊界條件，采用甲烷燃燒兩步反應(yīng)機(jī)理，設(shè)置穩(wěn)定的松弛因子，通過分離求解器計(jì)算得出模型燃燒空間內(nèi)溫度場。通過計(jì)算得出燃?xì)庠钤谑褂萌N不同類型的擋風(fēng)節(jié)能罩時(shí)燃燒空間溫度均比不使用擋風(fēng)節(jié)能罩時(shí)要高，其中燃燒空間溫度最高的為使用高硅氧擋風(fēng)節(jié)能罩。利用模擬計(jì)算得出的溫度場通過傳熱計(jì)算得到該燃?xì)庠钤诓皇褂脫躏L(fēng)節(jié)能罩時(shí)熱效率為39.6%，使用三種擋風(fēng)節(jié)能罩后熱效率均有提升，最高為使用高硅氧擋風(fēng)節(jié)能罩，能提升燃?xì)庠顭嵝手?2.6%。通過實(shí)驗(yàn)對比得到該燃?xì)庠畈皇褂霉?jié)能罩時(shí)平均熱效率最高為39.6%，使用鐵質(zhì)擋風(fēng)節(jié)能罩平均熱效率最高為44.2%，使用陶瓷擋風(fēng)節(jié)能罩平均熱效率最高為44.9%，使用高硅氧擋風(fēng)節(jié)能罩平均熱效率最高為52.8%。軟件模擬計(jì)算和實(shí)驗(yàn)結(jié)果都驗(yàn)證了擋風(fēng)節(jié)能罩在提高燃?xì)庠钇骄鶡嵝史矫嬗辛己玫男Ч?借助對燃?xì)庠顡躏L(fēng)節(jié)能罩節(jié)能特性的理論與實(shí)驗(yàn)研究，得到為了提高擋風(fēng)節(jié)能罩的節(jié)能效果，擋風(fēng)節(jié)能罩的外表面材料應(yīng)該選擇耐高溫且導(dǎo)熱系數(shù)低的材料，內(nèi)表面采用一層導(dǎo)熱系數(shù)高的材料，并且在內(nèi)壁設(shè)置一層催化燃燒的物質(zhì)，同時(shí)預(yù)留一定的二次空氣入口。壁厚則應(yīng)先保證其耐熱強(qiáng)度，在此之上盡量減少擋風(fēng)節(jié)能罩所吸收的熱量。
[Abstract]:The rapid development of global industrialization has led to a large consumption of energy, and the problem of energy shortage has become more and more obvious. Natural gas still occupies the leading position of global energy, and these three mainstream energy resources belong to non-renewable resources. Under the constant consumption, its storage capacity is becoming less and less, and energy saving has become a theme of social development at this stage. In China, gas is widely used, especially in domestic gas stoves. The average thermal efficiency of gas stoves is the main index to measure the combustion efficiency of gas stoves. The average thermal efficiency of most gas stoves in China is not high at the present stage, resulting in a large amount of energy waste. In order to conform to the social trend of global energy conservation, the research on improving the average thermal efficiency of gas stoves is also deepening. The research on energy saving of gas cooker is mainly focused on the development and design of new structure gas cooker and the auxiliary device of gas stove. In this paper, the energy saving hood of the auxiliary device of gas stove is studied, and its energy saving characteristic is analyzed. It provides the basis for the development of the wind shield with better energy saving effect. With the help of CFD software FLUENT, the numerical simulation of three different types of windshield for a domestic gas stove without using an air shield and using iron, ceramic and high silicon oxygen has been carried out in this paper. The temperature field of the combustion space of the gas stove under various conditions is obtained through the calculation results. The physical model is established by using the FLUENT pre-processing software gambit. The continuity equation, momentum conservation equation and energy conservation equation are used to establish the physical model. The component mass transfer equation K equation and 蔚 equation form a closed differential equation system. The boundary conditions are defined by component transmission, and the stable relaxation factor is set up by adopting the two-step reaction mechanism of methane combustion. The temperature field in the model combustion space is calculated by the separation solver, and the combustion space temperature of the gas stove using three different types of windshield is higher than that without the windshield. The highest temperature of combustion space is the use of high silicon oxygen windshield. The thermal efficiency of the gas stove is 39.6 when it is not used, and three kinds of windshield are used to save energy by using the temperature field calculated by simulation through heat transfer calculation. The thermal efficiency behind the cover is improved, Maximum use of high silicon oxygen windshield, The experimental results show that the average thermal efficiency of the stove is 39.6 when it is not used, the average thermal efficiency of using iron windshield is 44.2, and the average thermal efficiency of ceramic windshield is 44.2. The maximum rate is 44.9, and the average thermal efficiency of using high silicon oxygen windshield is 52.8. The results of simulation and experiment show that the windshield has a good effect in increasing the average thermal efficiency of gas stove. With the aid of the theoretical and experimental study on the energy saving characteristics of the windshield of the gas stove, it is obtained that in order to improve the energy saving effect of the windshield, the materials on the outer surface of the windshield should be selected with high temperature resistance and low thermal conductivity. The inner surface is made of a layer of material with high thermal conductivity, a layer of catalytic combustion material is arranged on the inner wall, and a certain inlet of secondary air is reserved. The thickness of the wall should first ensure its heat resistance strength. On top of this, minimize the heat absorbed by the windshield.
【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TU996.75;TS914.23
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