本文選題：斯特林熱機　切入點：碟式太陽能熱發(fā)電系統(tǒng)　出處：《山東大學》2015年碩士論文　論文類型：學位論文

【摘要】：化石能源的大量使用使煤、石油等儲量日益減少,價格大幅攀升,同時由于化石能源的使用而導致的生態(tài)環(huán)境問題日益凸顯。步入21世紀,面對嚴峻的能源形勢和越來越重的環(huán)境壓力,使得利用風能、太陽能、生物質等可再生能源進行發(fā)電越來越受到人們的密切關注。大力發(fā)展可再生能源對國家能源安全、環(huán)境改善等具有非常重要的戰(zhàn)略意義。碟式斯特林太陽能熱發(fā)電系統(tǒng)因其效率高、可模塊化、對環(huán)境適應力強等優(yōu)勢,受到國內外的廣泛關注。我國擁有豐富的太陽能和生物質資源,發(fā)展碟式斯特林太陽能熱發(fā)電系統(tǒng),以生物質能作為補充,不僅可以解決單純的碟式斯特林太陽能熱發(fā)電系統(tǒng)供電不穩(wěn)定的問題,同時太陽能和生物質能同屬可再生能源,符合現有的可持續(xù)發(fā)展的國策。本文針對碟式斯特林太陽能熱發(fā)電系統(tǒng)的應用特點,提出應用于碟式太陽能熱發(fā)電系統(tǒng)的混合式熱管接收器并針對混合式熱管接收器進行了大量理論和模擬研究,主要研究內容和結論如下：(1)在借鑒國內外接收器研究應用的基礎上,分析碟式太陽能熱發(fā)電系統(tǒng)接收器的工作特點及應滿足的條件,從接收器總體結構、熱管單元結構以及接收器工作原理等方面做了詳細闡述。根據傳熱學知識對熱管接收器進行簡化,對熱管接收器的傳熱過程進行分析計算,得到混合式熱管接收器模塊各部件的基本尺寸和相對位置。(2)對太陽能模式下不同尺寸的混合式熱管接收器進行模擬分析,得到在額定太陽輻射強度下,混合式熱管接收器腔體內部溫度分布,得到當腔體腔體深度為200mm,孔口直徑為90mm,腔體內部溫度分布均勻且腔體內壁面不會出現熱點,太陽能利用率最高。(3)對燃氣模式下混合式熱管接收器進行模擬分析,得到在不同燃燒熱負荷下,斯特林熱機的輸出功率,得出太陽能熱發(fā)電系統(tǒng)利用生物質氣燃燒產生的熱量發(fā)電效率為19%,比實驗值17%高。并分析不同保溫層厚度下接收器的熱量損失,得到接收器外壁最佳保溫層厚度為200mm。(4)對混合式熱管接收器不同尺寸和不同溫度下進行熱量損失模擬分析,發(fā)現接收器腔體深度對對流換熱損失影響較小,對輻射換熱損失影響較大；對流換熱損失和輻射換熱損失隨著孔口直徑的加大而增加；對流換熱損失與熱管運行溫度呈線性關系。
[Abstract]:The extensive use of fossil energy has reduced the reserves of coal and oil, increased the price, and made the ecological and environmental problems due to the use of fossil energy increasingly prominent. In 21th century, In the face of severe energy situation and more and more severe environmental pressure, people pay more and more attention to the use of renewable energy, such as wind, solar, biomass and other renewable energy to generate electricity. Due to its high efficiency, modularization and adaptability to the environment, the disk Stirling solar thermal power generation system is of great strategic significance. Our country has abundant solar energy and biomass resources, and develops the dish Stirling solar thermal power system, which is supplemented by biomass energy. Not only can we solve the problem of unstable power supply in the simple disk Stirling solar power generation system, but also solar energy and biomass energy are renewable energy sources. In accordance with the existing national policy of sustainable development, this paper aims at the application characteristics of the dish Stirling solar thermal power system. A hybrid heat pipe receiver for disc solar thermal power generation system is proposed, and a large number of theoretical and simulation studies are carried out for the hybrid heat pipe receiver. The main research contents and conclusions are as follows: (1) on the basis of the research and application of domestic and foreign receivers, the working characteristics and the conditions that should be met of the dish solar thermal power system receiver are analyzed, and the overall structure of the receiver is analyzed. The structure of the heat pipe unit and the working principle of the receiver are described in detail. According to the knowledge of heat transfer, the heat pipe receiver is simplified and the heat transfer process of the heat pipe receiver is analyzed and calculated. The basic dimensions and relative positions of each component of the hybrid heat pipe receiver module are obtained. (2) the hybrid heat pipe receiver with different sizes in solar mode is simulated and analyzed, and the solar radiation rating is obtained. When the cavity depth is 200mm and the diameter of the hole is 90mm, the temperature distribution in the cavity is uniform and there is no hot spot on the inner wall of the cavity. Solar energy utilization ratio is the highest. 3) the hybrid heat pipe receiver in gas mode is simulated and analyzed. The output power of Stirling heat engine is obtained under different combustion heat loads. The heat generation efficiency of solar thermal power system using biomass gas combustion is 19, which is higher than the experimental value of 17%. The heat loss of the receiver under different thickness of insulation layer is analyzed. The optimum insulation layer thickness of the outer wall of the receiver is 200mm. 4) the heat loss of the mixed heat pipe receiver is simulated at different sizes and temperatures. It is found that the depth of the receiver chamber has little effect on the convection heat transfer loss. The convection heat transfer loss and radiation heat transfer loss increase with the increase of orifice diameter, and the convection heat transfer loss is linearly related to the operating temperature of the heat pipe.
【學位授予單位】：山東大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TM615

【參考文獻】

相關博士學位論文 前1條

1 張海龍;中國新能源發(fā)展研究[D];吉林大學;2014年

，

本文編號：1579936