【摘要】：在環(huán)境污染和能源危機日益嚴(yán)峻的背景下,碟式太陽能熱發(fā)電技術(shù)由于光電轉(zhuǎn)換效率高,安裝方便等優(yōu)點,近年來受到了各國政府和研究機構(gòu)的青睞。我國具有豐富的太陽能資源、廣闊的未利用土地,以及較為完善的基礎(chǔ)設(shè)施等有利條件,適合太陽能電站的發(fā)展。本文通過建立碟式太陽能熱發(fā)電系統(tǒng)模型,模擬分析系統(tǒng)性能,綜合分析性能參數(shù)特性,為我國典型氣象條件下碟式太陽能熱發(fā)電技術(shù)的發(fā)展提供依據(jù)。首先,分析聚光器系統(tǒng)誤差、截獲系數(shù)、接收器開口直徑和吸熱器溫度等對集熱器能量損耗的影響,得出了聚光器最終輸出能量函數(shù)；分析了接收器工作時的對流熱損失、輻射熱損失、導(dǎo)熱損失和反射損失,得出接收器熱損失主要是對流熱損失和輻射熱損失,最終確定了聚光集熱子系統(tǒng)的有效輸出能量；介紹了斯特林機的類型,及不同類型的優(yōu)缺點。針對a型斯特林機循環(huán)工作過程進行了分析并確定了斯特林機輸出功率的函數(shù)�；诰酃馄鳌⒔邮掌骱退固亓謾C的能量傳遞的分析,建立了碟式太陽能熱發(fā)電系統(tǒng)模型,得到了各模塊之間的函數(shù)關(guān)系,確定了最終系統(tǒng)輸出能量的函數(shù)。其次,模擬分析了氣象條件、運行參數(shù)和結(jié)構(gòu)參數(shù)對系統(tǒng)性能的影響。分析得出斯特林機壓力與太陽輻射強度呈線性增大關(guān)系；斯特林機熱頭溫度保持在設(shè)定值范圍內(nèi)時,系統(tǒng)輸出功率隨斯特林機壓力的增大而升高；當(dāng)環(huán)境溫度降低時,斯特林機效率和系統(tǒng)輸出功率均有所升高,但系統(tǒng)輸出功率升高幅度不大；當(dāng)風(fēng)速增大時,接收器效率及系統(tǒng)輸出功率均降低。綜合考慮斯特林機輸出功率和穩(wěn)定性,確定了熱頭溫度最佳設(shè)定值。分析了接收器孔徑對接收器效率和功率的影響,確定了最佳接收器孔徑。最后,對系統(tǒng)進行了(?)及(?)經(jīng)濟分析。基于灰箱模型對系統(tǒng)進行了(?)分析,得出系統(tǒng)的(?)效率高達30.9%,超過了槽式太陽能發(fā)電的(?)效率。(?)利用效率相對薄弱的環(huán)節(jié)在動力子系統(tǒng),其(?)效率為46.8%,(?)損失占總(?)損失的50.8%,占總輸入(?)量的35.1%。其次聚光集熱子系統(tǒng)的(?)利用效率66.0%,(?)損失占(?)總輸入量的34.0%,占總(?)損失的49.2%。提高系統(tǒng)(?)效率的關(guān)鍵在于提高動力轉(zhuǎn)換過程的效率。對系統(tǒng)進行了(?)經(jīng)濟分析,結(jié)果表明隨著系統(tǒng)使用周期的延長、降低固定資產(chǎn)的初始投資都會降低該系統(tǒng)的產(chǎn)品(?)成本,其次也可以在太陽輻射強度高,日照時間長的地區(qū)建立該碟式太陽能熱發(fā)電系統(tǒng)從而增加系統(tǒng)的年輸出(?),因此產(chǎn)品(?)成本也會降低。
[Abstract]:In the background of environmental pollution and energy crisis, dish solar thermal power generation technology has been favored by governments and research institutions in recent years because of its high photoelectric conversion efficiency, easy installation and so on. China has abundant solar energy resources, vast unused land, and relatively perfect infrastructure, which is suitable for the development of solar power plants. In this paper, the model of disc solar thermal power generation system is established, the performance of the system is simulated and analyzed, and the characteristics of performance parameters are synthetically analyzed, which provides the basis for the development of dish solar thermal power generation technology under typical meteorological conditions in China. Firstly, the effects of system error, interception coefficient, receiver opening diameter and temperature of collector on energy loss of collector are analyzed, the final output energy function of concentrator is obtained, and the convection heat loss of receiver is analyzed. The heat loss of the receiver is mainly convection heat loss and radiation heat loss. Finally, the effective output energy of the condensing heat collection subsystem is determined, and the type of Stirling machine is introduced. And the advantages and disadvantages of different types. The function of output power of Stirling machine is determined by analyzing the cycle working process of type a Stirling machine. Based on the analysis of energy transfer between concentrator, receiver and Stirling machine, the model of disc solar thermal power generation system is established, and the functional relationship among the modules is obtained, and the output energy function of the final system is determined. Secondly, the effects of meteorological conditions, operation parameters and structure parameters on the system performance are simulated and analyzed. The results show that the pressure of Stirling machine increases linearly with the intensity of solar radiation, the output power of Stirling machine increases with the increase of the pressure of Stirling machine, and when the temperature of Stirling engine hot head is kept in the range of fixed value, the output power of the system increases with the increase of the pressure of Stirling machine. The efficiency of Stirling machine and the output power of the system are increased, but the output power of the system is not much increased, while the efficiency of the receiver and the output power of the system decrease with the increase of the wind speed. Considering the output power and stability of Stirling machine, the optimum setting value of hot head temperature is determined. The influence of receiver aperture on receiver efficiency and power is analyzed, and the optimum receiver aperture is determined. Finally, the system is carried out (?) And (?) Economic analysis Based on the grey box model, the system is analyzed. Analyze and get the systematic (?) The efficiency is as high as 30.9, more than the trough solar power generation (?) Efficiency. Utilization efficiency is relatively weak in the power subsystem, its (?) Efficiency is 46.8%, (?) Losses account for the total (?) The loss of 50.8% of the total input (?) The value of 35. 1. Secondly, the (?) Utilization efficiency 66.0, (?) Loss share (?) 34.0% of the total input, accounting for the total (?) The loss of 49.2%. Improve the system (?) The key of efficiency is to improve the efficiency of power conversion process. The system was carried out (?) Economic analysis, the results show that with the extension of the system life cycle, reducing the initial investment in fixed assets will reduce the system products (?) The cost, secondly, can also be established in areas with high solar radiation intensity and long sunshine time, thereby increasing the annual output of the system, so that the product (?) Costs will also be reduced.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM615

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相關(guān)期刊論文 前1條

1 錢伯章;;BP世界能源統(tǒng)計2014年評論[J];電力與能源;2014年05期

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本文編號：2152813