太阳能供热的生物质超临界水制氢中蓄热材料的热力学分析与优选

发布时间：2018-06-03 09:44

本文选题：化学蓄热 + 蓄热材料　；参考：《西安建筑科技大学》2013年硕士论文

【摘要】：太阳能资源极为丰富，具有非常大的开发潜力，但太阳能具有分散性、间接性、随机性等特点。氢能是一种高效清洁能源，其能量密度高，利用形式多样化，运输、存储方便。开发清洁的可再生能源，，可以很好的解决能源和环境问题。利用可再生能源制氢是未来能源的发展趋势。太阳能供热的生物质超临界水制氢是制氢技术中新的研究方向。在太阳能供热的生物质超临界水制氢技术中，要实现高效低成本，必须重点解决太阳能高效聚集、传输和储存等问题。由于金属氢氧化物、碳酸盐和硫酸盐研究广泛，安全性高，因此本文选择这三类金属化合物作为化学反应蓄热材料研究对象。根据太阳能供热的生物质超临界水制氢系统对化学反应蓄热材料的要求，以转向温度作为主要优选参数，总结了优选化学反应蓄热材料的标准。通过HSC chemistry热化学计算软件计算蓄热材料热分解反应的热力学参数，研究了三类典型蓄热材料热分解反应的转向温度、反应热以及稳定性。根据优选标准在各类蓄热材料中选出最佳的蓄热材料。结果表明：在三类蓄热材料中，硫酸镍为最佳的化学反应蓄热材料。其中，在金属氢氧化物中，氢氧化钡为最佳蓄热材料；在碳酸盐中，碳酸钙为最佳蓄热材料；在硫酸盐中，硫酸镍为最佳蓄热材料。本文对化学反应蓄热材料做了较为全面的总结，并结合太阳能供热的生物质超临界水制氢系统，总结了化学反应蓄热材料的优选标准。通过此优选标准能够快速直观地优选出适合太阳能供热的生物质超临界水制氢系统的蓄热材料。为化学反应蓄热材料的进一步研究提供了理论依据，对太阳能供热的生物质超临界水制氢中化学反应蓄热技术的发展具有一定的指导价值。
[Abstract]:Solar energy is rich in resources and has great potential for development, but solar energy has the characteristics of dispersion, indirectness, randomness and so on. Hydrogen energy is a kind of high efficiency clean energy, its energy density is high, the form of utilization is diversified, transportation, storage is convenient. Developing clean and renewable energy can solve energy and environmental problems well. Using renewable energy to produce hydrogen is the development trend of energy in the future. Hydrogen production from biomass supercritical water for solar energy heating is a new research direction in hydrogen production technology. In the hydrogen production technology of biomass supercritical water for solar energy heating, in order to achieve high efficiency and low cost, it is necessary to focus on solving the problems of solar energy efficient accumulation, transmission and storage. Because of the extensive research of metal hydroxide, carbonate and sulfate, these three kinds of metal compounds are selected as the research object of chemical reaction heat storage material. According to the requirements of biomass supercritical water hydrogen production system for solar energy heating for chemical reaction heat storage materials, the standard of chemical reaction storage materials was summarized with the steering temperature as the main optimal selection parameter. The thermodynamic parameters of thermal decomposition reaction of regenerative materials were calculated by HSC chemistry thermochemical calculation software, and the turning temperature, reaction heat and stability of three kinds of typical regenerative materials were studied. According to the optimal selection standard, the best heat storage material is selected from all kinds of heat storage materials. The results show that nickel sulfate is the best heat storage material for chemical reaction among the three kinds of heat storage materials. Among them, barium hydroxide is the best heat storage material in metal hydroxide, calcium carbonate is the best heat storage material in carbonate, and nickel sulfate is the best heat storage material in sulfate. In this paper, a comprehensive summary of chemical reaction regenerative material is made, and combining with the biomass supercritical water hydrogen production system of solar energy heating, the optimum selection standard of chemical reaction heat storage material is summarized. Through this standard, the heat storage materials of biomass supercritical water hydrogen production system suitable for solar energy heating can be selected quickly and intuitively. It provides a theoretical basis for the further study of chemical reaction heat storage materials and has certain guiding value for the development of chemical reaction heat storage technology in the production of hydrogen from biomass supercritical water for solar heating.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU832.17

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