太阳能与甲醇热化学互补发电变辐照全工况系统集成方法

发布时间：2018-03-03 06:39

本文选题：太阳能热化学　切入点：品位耦合　出处：《中国科学院工程热物理研究所》2017年博士论文　论文类型：学位论文

【摘要】：新能源的有效利用是当前世界能源研究领域的重要方向。鉴于当前新能源技术刚刚起步的发展特点,新能源和传统化石能源互补利用是当前能源科学研究的热点。本学位论文依托国家自然科学基金重点项目,针对中低温太阳能热化学互补发电系统的关键技术和核心科学问题,开展了中低温太阳能与吸热化学反应互补发电的系统集成机理与不同太阳辐照强度时的多反应协同调控方法研究。基于化学能和物理能的综合梯级利用原理,从能的品位概念出发,研究了不同太阳辐照强度时太阳能热化学过程的品位耦合规律,分析了太阳能驱动的甲醇重整反应、甲醇裂解反应和甲烷重整反应三个吸热反应在不同太阳辐照强度时的热力学特点,研究了以上三个太阳能驱动的吸热反应在不同太阳辐照强度时的品位耦合特性规律,揭示了太阳能驱动吸热反应过程的不可逆特性。针对中低温太阳能驱动甲醇裂解反应互补发电系统在整个太阳辐照强度区间时热力性能差,年均太阳能净发电效率低的问题,从太阳能集热品位与吸热反应品位匹配的思路出发,探索了双反应协同调控方法:在太阳辐照强度较低时,太阳能与甲醇重整反应互补,在太阳辐照强度较高时,太阳能与甲醇裂解反应互补,此方法实现了互补发电系统在整个太阳辐照强度区间热力性能的提升。基于此方法,分析了燃料品位与太阳能集热品位的耦合特性,提出了多反应协同调控的互补发电系统,研究了四季典型日太阳能燃料产率和太阳能净发电效率的变化规律,给出了基于双反应协同调控方法的系统全年热力性能。参与研制了国际首套百千瓦中低温太阳能热化学互补发电实验平台,开展了部分实验研究。以此实验台为基础,对百千瓦中低温太阳能热化学互补发电电站进行了技术经济性分析。
[Abstract]:The effective utilization of new energy is an important direction in the field of energy research in the world. The complementary utilization of new energy and traditional fossil energy is a hot spot in the current energy science research. Based on the key projects of the National Natural Science Foundation, this dissertation aims at the key technologies and core scientific issues of solar thermochemical complementary power generation system at medium and low temperatures. The system integration mechanism of solar energy and endothermic chemical reaction complementary power generation at moderate and low temperatures and the method of multi-reaction synergistic control under different solar radiation intensities are studied. Based on the principle of comprehensive cascade utilization of chemical and physical energy, Based on the concept of grade of energy, the grade coupling law of solar thermochemical process under different solar irradiation intensity was studied, and the methanol reforming reaction driven by solar energy was analyzed. The thermodynamic characteristics of three endothermic reactions of methanol pyrolysis and methane reforming at different solar irradiation intensities were studied. The coupling characteristics of the three solar energy driven endothermic reactions at different solar irradiation intensities were studied. The irreversible characteristics of the solar energy driven endothermic reaction process are revealed. The thermal performance of the solar energy driven methanol pyrolysis reaction complementary power generation system is poor in the whole solar irradiation intensity range, and the annual net solar power generation efficiency is low. Based on the idea of matching the grade of solar energy collecting heat with the grade of endothermic reaction, the method of double reaction synergistic regulation is explored: when the solar radiation intensity is low, the solar energy and methanol reforming reaction complement each other, and when the solar radiation intensity is high, the solar energy and methanol reforming reaction complement each other. The thermal performance of the complementary generation system in the whole solar radiation intensity range is improved by this method. Based on this method, the coupling characteristics of fuel grade and solar energy collector grade are analyzed. A complementary power generation system with multi-reaction coordinated regulation is proposed. The variation of solar fuel production rate and solar net power generation efficiency in the four seasons are studied. The thermal performance of the system based on the dual reaction cooperative control method is presented. The first international experimental platform for 100 kilowatt low temperature solar thermochemical complementary power generation is developed, and some experimental studies are carried out. The technical and economic analysis of 100 kilowatt solar thermochemical complementary power station is carried out.
【学位授予单位】：中国科学院工程热物理研究所
【学位级别】：博士
【学位授予年份】：2017
【分类号】：TM615

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