發(fā)布時間：2018-01-23 12:10

  本文關(guān)鍵詞： 太陽能熱發(fā)電 生物質(zhì)直燃 互補(bǔ)利用 變輻照調(diào)節(jié)方法 生物乙醇 冷熱電聯(lián)產(chǎn)　出處：《中國科學(xué)院研究生院（工程熱物理研究所）》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：化石能源短缺以及化石能源利用過程中帶來的環(huán)境污染和全球變暖已成為制約人類社會可持續(xù)發(fā)展的瓶頸,能源結(jié)構(gòu)的變革勢在必行,可再生能源以其清潔環(huán)保和取之不盡等優(yōu)勢將逐漸取代傳統(tǒng)化石能源。近年來,太陽能和生物質(zhì)能作為兩種重要的可再生能源得到了國際學(xué)術(shù)界和工業(yè)界的高度關(guān)注。 本學(xué)位論文依托國家自然科學(xué)重點(diǎn)基金項(xiàng)目、國家973項(xiàng)目等科研任務(wù),開展了太陽能與生物質(zhì)能互補(bǔ)利用的能源系統(tǒng)研究。具體工作如下： (1)為克服單獨(dú)槽式太陽能熱發(fā)電效率低和單獨(dú)生物質(zhì)直燃發(fā)電規(guī)模小的難題,提出了新型太陽能與生物質(zhì)能互補(bǔ)發(fā)電系統(tǒng),模擬計(jì)算了系統(tǒng)的熱力性能,對系統(tǒng)進(jìn)行了(?)平衡分析,討論了新系統(tǒng)中利用太陽能取代汽輪機(jī)不同級抽汽加熱給水對系統(tǒng)熱力性能的影響。 (2)針對新型太陽能與生物質(zhì)能互補(bǔ)發(fā)電系統(tǒng)在太陽輻照偏離設(shè)計(jì)點(diǎn)的運(yùn)行工況,提出了變?nèi)剂线M(jìn)料量調(diào)節(jié)和變工質(zhì)流量調(diào)節(jié)兩種變輻照調(diào)節(jié)方法,研究并比較了太陽輻照強(qiáng)度從從500W/m2變化到900W/m2時兩種變工況調(diào)節(jié)方法下的系統(tǒng)熱力性能。變?nèi)剂线M(jìn)料量調(diào)節(jié)可以維持穩(wěn)定出功和較高的太陽能凈發(fā)電效率,變工質(zhì)流量調(diào)節(jié)可以維持較高的太陽能份額。 (3)模擬研究了乙醇水蒸氣重整制氫反應(yīng)過程,探討了反應(yīng)的操作條件(包括溫度、壓力和水醇比)對重整反應(yīng)產(chǎn)物的影響。將太陽能熱驅(qū)動乙醇水蒸氣重整的熱化學(xué)反應(yīng)過程與冷熱電聯(lián)產(chǎn)有機(jī)結(jié)合,提出了太陽能與生物乙醇熱化學(xué)互補(bǔ)的微燃機(jī)冷熱電聯(lián)產(chǎn)系統(tǒng)。系統(tǒng)利用太陽能供熱驅(qū)動乙醇水蒸氣重整產(chǎn)生富氫氣體,并以之作為燃料帶動冷熱電聯(lián)產(chǎn)系統(tǒng)的運(yùn)行,對系統(tǒng)進(jìn)行了能量平衡分析和(?)平衡分析,模擬了系統(tǒng)在變輻照條件下的熱力性能,討論了微燃機(jī)透平入口初溫、壓比、回?zé)崞髯钚�傳熱溫差等關(guān)鍵參數(shù)對系統(tǒng)熱力性能的影響。
[Abstract]:The shortage of fossil energy and the environmental pollution and global warming caused by fossil energy utilization have become the bottleneck restricting the sustainable development of human society. The transformation of energy structure is imperative. Renewable energy will gradually replace the traditional fossil energy in recent years because of its advantages of clean, environmental protection and inexhaustible. Solar energy and biomass energy as two important renewable energy have been highly concerned by the international academia and industry. Based on the research tasks of the National Natural Science Foundation and 973 projects, this dissertation has carried out the research on the energy system in which solar energy and biomass energy complement each other. The specific work is as follows: In order to overcome the problems of low efficiency of single trough solar thermal power generation and small scale of direct combustion power generation of biomass, a new type of solar energy and biomass energy complementary power generation system is proposed, and the thermodynamic performance of the system is simulated and calculated. The system has been drilled? The influence of solar energy instead of steam turbine's different stage extraction heating feed water on the thermodynamic performance of the new system is discussed. 2) aiming at the operating condition of a new type of solar energy and biomass energy complementary power generation system deviating from the design point of solar irradiation, two methods of variable irradiation regulation, variable fuel intake regulation and variable working fluid flow regulation, are proposed. This paper studies and compares the thermal performance of the system under two off-condition regulation methods when the solar radiation intensity changes from 500W / m2 to 900W / m2. The variable fuel feed regulation can maintain stable output and high power. Net solar power generation efficiency. Variable fluid flow regulation can maintain a higher share of solar energy. 3) the reaction process of ethanol steam reforming to produce hydrogen was simulated, and the operating conditions (including temperature) were discussed. The effect of pressure and ratio of water to alcohol on the products of the reforming was studied. The thermal chemical reaction process of ethanol steam reforming driven by solar energy was combined with the cogeneration of cold, heat and electricity. In this paper, a thermo-chemical co-generation system between solar energy and bioethanol is proposed. The system uses solar energy to drive the steam reforming of ethanol to produce hydrogen rich body. The system is used as fuel to drive the operation of the cogeneration system of cooling, heat and electricity, and the energy balance of the system is analyzed and analyzed. The equilibrium analysis simulates the thermal performance of the system under the condition of variable irradiation, and discusses the influence of the key parameters such as the initial temperature at the inlet of the micro gas turbine, the pressure ratio and the minimum heat transfer temperature difference of the regenerator on the thermal performance of the system.
【學(xué)位授予單位】：中國科學(xué)院研究生院（工程熱物理研究所）
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM61

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