發(fā)布時(shí)間：2018-09-16 19:05

【摘要】：能源和淡水資源是人類社會(huì)生存和發(fā)展的物質(zhì)基礎(chǔ),當(dāng)前,世界各國(guó)普遍以煤炭、石油、天然氣為傳統(tǒng)能源。隨著傳統(tǒng)能源的短缺、淡水資源缺乏和傳統(tǒng)能源造成的環(huán)境污染日益嚴(yán)重,世界各國(guó)把發(fā)展重心轉(zhuǎn)向可再生能源的開發(fā)和利用。綜合考慮太陽(yáng)能的優(yōu)點(diǎn)和抽水蓄能電站的特點(diǎn)提出一種新的技術(shù)：太陽(yáng)能輔助抽水蓄能發(fā)電技術(shù)。首先,對(duì)提出太陽(yáng)能輔助抽水蓄能發(fā)電技術(shù)的原因和必要性進(jìn)行了分析,并對(duì)太陽(yáng)能輔助抽水蓄能發(fā)電技術(shù)的原理和各種技術(shù)的支持進(jìn)行了系統(tǒng)的分析與研究,對(duì)此技術(shù)中的太陽(yáng)能集熱器、蒸汽上升系統(tǒng)、換熱系統(tǒng)和冷凝系統(tǒng)進(jìn)行了簡(jiǎn)單的設(shè)計(jì)與計(jì)算分析。然后,采用FLUENT軟件對(duì)太陽(yáng)能輔助抽水發(fā)電技術(shù)中的關(guān)鍵子系統(tǒng)蒸汽上升管系統(tǒng)進(jìn)行數(shù)值模擬,得到了蒸汽上升管內(nèi)部溫度場(chǎng)、壓力場(chǎng)和速度場(chǎng)。研究了蒸汽上升管不同的結(jié)構(gòu)參數(shù)對(duì)管內(nèi)蒸汽流速和管內(nèi)抽力的影響,從模擬結(jié)果中得出結(jié)論：上升管高度越高,管內(nèi)的抽力越大,流速越快。高度一定時(shí),半徑越大,管內(nèi)的抽力越小,流速越小。最后,研究了太陽(yáng)能輔助抽水蓄能發(fā)電技術(shù)應(yīng)用于海水淡化和水電聯(lián)產(chǎn)的運(yùn)行方式。從經(jīng)濟(jì)上分析太陽(yáng)能輔助抽水蓄能發(fā)電技術(shù)的可行性,采取投資回收年限對(duì)此技術(shù)進(jìn)行研究。太陽(yáng)能輔助抽水蓄能發(fā)電技術(shù)只考慮發(fā)電價(jià)值和投資的情況下,其投資回報(bào)年限為20年,考慮海水淡化和環(huán)境的價(jià)值后,此技術(shù)的投資回收年限為8.2年。對(duì)此技術(shù)的回收年限和能源平均成本影響最大的因素太陽(yáng)能集熱價(jià)格進(jìn)行了研究分析。再綜合考慮系統(tǒng)的社會(huì)價(jià)值和電網(wǎng)價(jià)值,從而證明此技術(shù)是可行的,具有一定的研究?jī)r(jià)值和推廣價(jià)值。
[Abstract]:Energy and fresh water resources are the material basis for the survival and development of human society. At present, coal, oil and natural gas are widely used as traditional energy in the world. With the shortage of traditional energy, the shortage of fresh water resources and the increasingly serious environmental pollution caused by traditional energy, countries all over the world turn to the development and utilization of renewable energy. Considering the advantages of solar energy and the characteristics of pumped storage power station, a new technology, solar assisted pumped storage power generation technology, is proposed. Firstly, the reasons and necessity of solar assisted pumped storage power generation technology are analyzed, and the principle of solar assisted pumped storage power generation technology and the support of various technologies are systematically analyzed and studied. The solar collector, steam rising system, heat transfer system and condensing system are simply designed and calculated. Then, FLUENT software is used to simulate the steam riser system, which is a key subsystem in the solar assisted pumping technology. The temperature field, pressure field and velocity field in the steam riser are obtained. The influence of different structural parameters of steam riser on the steam velocity and pumping force in the pipe is studied. It is concluded from the simulation results that the higher the height of the riser tube, the greater the suction force in the pipe and the faster the velocity of flow. When the height is constant, the larger the radius, the smaller the pumping force and velocity. Finally, the application of solar-assisted pumped storage power generation technology to seawater desalination and hydropower co-generation is studied. The feasibility of solar assisted pumped storage power generation technology is analyzed economically, and the investment recovery years are adopted to study the technology. The investment return life of solar assisted pumped storage power generation technology is 20 years when the value and investment of power generation are only considered. After considering the value of seawater desalination and environmental value, the investment recovery life of this technology is 8.2 years. The factors that have the greatest influence on the recovery life and average energy cost of this technology are studied and analyzed in this paper. Considering the social value of the system and the value of the power grid, it is proved that the technology is feasible and has certain research value and popularization value.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TV743;TK519
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本文編號(hào)：2244489