本文選題：相變儲(chǔ)熱 + 鋁合金��； 參考：《華北電力大學(xué)》2015年碩士論文

【摘要】：利用太陽(yáng)能發(fā)電可以有效緩解傳統(tǒng)熱力發(fā)電帶來(lái)的能源短缺、資源枯竭、環(huán)境污染等問(wèn)題。太陽(yáng)能集中式熱發(fā)電系統(tǒng)效率高,易于大型化,發(fā)展?jié)摿薮?然而太陽(yáng)能的獲取與實(shí)際能量的需求之間常常是不匹配的,因此需要配備儲(chǔ)熱子系統(tǒng)來(lái)實(shí)現(xiàn)能量的連續(xù)供應(yīng)。儲(chǔ)熱系統(tǒng)工作效率的高低很大程度上取決于所采用的儲(chǔ)熱介質(zhì),相變儲(chǔ)熱材料可實(shí)現(xiàn)在基本恒定的溫度下儲(chǔ)存大量的相變潛熱,具有很大的應(yīng)用前景。而在高溫相變儲(chǔ)熱材料中,鋁基合金因其優(yōu)良的性能表現(xiàn)出了極大的發(fā)展?jié)摿�。本文主要針�?duì)鋁基合金相變儲(chǔ)熱材料開(kāi)展相關(guān)的熱物性及其儲(chǔ)熱特性研究。論文在對(duì)鋁基合金相變儲(chǔ)熱材料進(jìn)行成分設(shè)計(jì)的基礎(chǔ)上,經(jīng)高溫熔煉制備了多種鋁基二元和三元相變儲(chǔ)熱材料。采用滴定法、重量法和電感耦合等離子體發(fā)射光譜法相結(jié)合測(cè)試了相變儲(chǔ)熱材料的成分,采用差示掃描量熱法測(cè)定了鋁基合金材料的相變溫度、相變潛熱及比熱,采用激光脈沖法在不同溫度下測(cè)量了鋁基合金相變材料的熱擴(kuò)散率,并計(jì)算得到了相應(yīng)的導(dǎo)熱系數(shù),得到了元素種類(lèi)和添加量對(duì)鋁基合金材料主要熱物性的影響規(guī)律,結(jié)合實(shí)驗(yàn)研究結(jié)果分別推薦了計(jì)算不同溫度下鋁基合金相變儲(chǔ)熱材料的比熱計(jì)算公式和導(dǎo)熱系數(shù)計(jì)算公式,對(duì)試樣在400～800℃內(nèi)的總儲(chǔ)熱量進(jìn)行了計(jì)算分析,得到了合金元素種類(lèi)和添加量對(duì)鋁基合金單位質(zhì)量材料儲(chǔ)熱量和單位體積儲(chǔ)熱量的影響規(guī)律。綜合衡量了所制備的各合金材料的相變溫度、相變潛熱、單位質(zhì)量和單位體積儲(chǔ)熱量及導(dǎo)熱系數(shù),得到了具有最優(yōu)儲(chǔ)熱性能的鋁合金相變儲(chǔ)熱材料,為相關(guān)儲(chǔ)熱系統(tǒng)設(shè)計(jì)提供了基本的物性參數(shù)及參考依據(jù)。
[Abstract]:Solar power generation can effectively alleviate the problems of energy shortage, resource exhaustion and environmental pollution caused by traditional thermal power generation. The solar centralized thermal power generation system is highly efficient, easy to be large, and has great potential for development. However, solar energy is often not matched with the actual energy demand, so it is required to be equipped with a thermal storage system. The efficiency of the heat storage system depends largely on the heat storage medium used. The phase change heat storage material can actually store a large amount of latent heat of phase change under the basic constant temperature, and it has a great application prospect. In the high temperature phase change heat storage material, the aluminum base alloy is characterized by its excellent performance. In this paper, the thermal properties and heat storage characteristics of aluminum based alloy phase change materials are mainly studied in this paper. On the basis of the composition design of the aluminum based alloy phase change materials, a variety of aluminum based two and three phase thermal storage materials have been prepared by high temperature melting. The phase change temperature, latent heat and specific heat were measured by differential scanning calorimetry (differential scanning calorimetry). The thermal diffusivity of Al based alloy phase change materials was measured at different temperatures by laser pulse calorimetry. The corresponding thermal conductivity system was calculated. The effect of element type and addition amount on the main thermal properties of aluminum based alloy materials is obtained. The calculation formula for calculating the specific heat and thermal conductivity of the phase change heat storage materials at different temperatures are recommended respectively. The total heat storage of the sample at 400~800 C is calculated and analyzed. The effect of the type and amount of alloying elements on the heat storage and unit volume heat storage of the aluminum base alloy per unit mass material is studied. The phase change temperature, latent heat of phase change, unit mass and unit volume heat storage and thermal conductivity are synthetically measured, and the phase change heat storage material with the best heat storage property is obtained. The material provides basic physical parameters and references for the design of the relevant heat storage system.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB34

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本文編號(hào)：2016412