發(fā)布時(shí)間：2018-05-31 01:45

  本文選題：兩段式塔式太陽(yáng)能發(fā)電 + 系統(tǒng)組成��； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：塔式太陽(yáng)能熱發(fā)電技術(shù)是一項(xiàng)非常有前途的應(yīng)用技術(shù),由于塔式太陽(yáng)能聚光溫度高,可以獲得較其他幾種太陽(yáng)能熱發(fā)電高的熱電轉(zhuǎn)化效率,同時(shí)該技術(shù)適合于大容量發(fā)電。目前,國(guó)內(nèi)外對(duì)于塔式太陽(yáng)能發(fā)電技術(shù)都做了大量的研究,塔式太陽(yáng)能發(fā)電技術(shù)應(yīng)用已經(jīng)接近大規(guī)模應(yīng)用。 在現(xiàn)有國(guó)內(nèi)外塔式太陽(yáng)能熱發(fā)電研究的基礎(chǔ)上,本文提出了一種新型的兩段式塔式太陽(yáng)能發(fā)電系統(tǒng),首先對(duì)系統(tǒng)進(jìn)行了整體設(shè)計(jì),系統(tǒng)主要包括定日鏡場(chǎng)、吸熱器Ⅰ、汽水分離裝置、吸熱器Ⅱ、天然氣補(bǔ)燃裝置、蓄熱系統(tǒng)和動(dòng)力發(fā)電系統(tǒng),對(duì)各個(gè)子系統(tǒng)進(jìn)行了介紹,并給出了系統(tǒng)的分析計(jì)算方法和工質(zhì)側(cè)的熱力學(xué)計(jì)算方法。 然后,分析了兩段式塔式太陽(yáng)能系統(tǒng)的運(yùn)行調(diào)節(jié)。太陽(yáng)能熱發(fā)電系統(tǒng)在運(yùn)行時(shí),需要考慮光照條件和變工況運(yùn)行的影響。根據(jù)影響條件的變化,將系統(tǒng)的調(diào)節(jié)方式分為四種運(yùn)行方式,并進(jìn)一步分析了每個(gè)運(yùn)行方式的汽水流程,通過(guò)計(jì)算得出了流量與光照條件的關(guān)系,吸熱器Ⅰ出口工質(zhì)干度的變化,以及不同光照條件下不同熱負(fù)荷時(shí)蓄熱量的變化,得出不同光照條件、不同負(fù)荷時(shí)的運(yùn)行方式分布圖,使得對(duì)系統(tǒng)的調(diào)節(jié)更加直觀。 最后,對(duì)吸熱器建立輻射換熱模型,分析幾何結(jié)構(gòu)尺寸與換熱效果之間的影響,通過(guò)分析計(jì)算吸熱器各面之間角系數(shù)、平均熱負(fù)荷及開(kāi)窗理論折算溫度T0的影響,確定了吸熱器尺寸。對(duì)吸熱器進(jìn)行了壓降計(jì)算,分析氣液兩相流動(dòng)特點(diǎn),確定了受熱面的管道布置,并通過(guò)水動(dòng)力計(jì)算對(duì)其進(jìn)行優(yōu)化。
[Abstract]:The tower - type solar thermal power generation technology is a very promising application technology , because the tower - type solar concentrating temperature is high , the thermoelectric conversion efficiency higher than that of other types of solar thermal power generation can be obtained , and meanwhile , the technology is suitable for large - capacity power generation . At present , the tower - type solar power generation technology has a large amount of research on the tower - type solar power generation technology , and the tower - type solar power generation technology application has been close to the large - scale application .

This paper presents a new two - stage tower - type solar power generation system based on the existing domestic and international tower solar thermal power generation system . First , the whole system is designed . The system mainly includes heliostats , heat absorber I , steam - water separating device , heat absorber II , natural gas burning device , thermal storage system and power generation system . The subsystems are introduced , and the analytical calculation method and thermodynamic calculation method of working medium side are given .

Then , the operation regulation of the two - stage tower type solar system is analyzed . In operation , the solar thermal power generation system needs to take into account the influence of lighting conditions and variable working conditions . According to the change of the influencing conditions , the regulation mode of the system is divided into four operating modes , and the change of the heat storage capacity at different heat loads under different lighting conditions is obtained through calculation , and the distribution chart of the operation mode at different lighting conditions and different loads is obtained , so that the regulation of the system is more visual .

In the end , the radiation heat transfer model is established for the heat absorber , the influence of the size of the geometry structure and the heat transfer effect is analyzed . By analyzing the influence of the angle coefficient , the average heat load and the theoretical conversion temperature T0 of the heat absorber , the size of the heat absorber is determined . The heat absorber is subjected to pressure drop calculation , the characteristics of the two - phase flow of the gas - liquid are analyzed , the pipeline arrangement of the heated surface is determined , and the heat absorber is optimized by the hydrodynamic calculation .
【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】：2014
【分類(lèi)號(hào)】：TM615

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