作　　者： ; ;

机构地区： 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室

出　　处： 《华南理工大学学报（自然科学版）》 2008年第7期21-25,共5页

摘　　要： 热化学储能问题是纯太阳能热发电过程中最关键的一个环节.文中分析了储能体系的选择,介绍了氨基热化学储能的基本原理,在此基础上建立了放热反应器(氨合成反应器)的数学模型,计算和绘制出了放热反应器长度与反应温度、反应温度与氨摩尔分数以及热量和输出与反应器内壁平均温度之间的关系曲线,直观地反映了在一定的设计压力和氢氮比下,进气温度和进气流率对放热反应的影响,给出了实现最优化和热能最优化的操作参数.模拟结果表明:反应器内催化床层的平均温度是实现和能量最优化的最优调节参数,反应温度为850℃时输出最大,650℃时输出最大热能. In the all-solar thermal power generation, the thermochemical energy storage is a key step. In this paper, the choice of energy storage system is analyzed and the basic principle of ammonia-based thermochemical energy storage is introduced. Based on this principle, a mathematical model of an exothermic reactor （ammonia-synthesizing reactor） is established to obtain the curves of the exothermic reactor length versus the reaction temperature, of the reaction temperature versus the molar fraction of ammonia and of the average internal reactor wall temperature versus the exergy and heat energy outputs. Thus, the effects of the inlet gas temperature and flowrate on the ammonia-synthesizing reaction under definite design pressure and hydrogen-to-nitrogen ratio are directly reflected, and the optimized operation parameters to realize maximum exergy and heat energy outputs are determined. Simulated results indicate that the average temperature of the catalyst bed in the reactor is an optimal control parameter to realize maximum exergy and heat energy outputs, and that the exergy and heat energy outputs reach their maximum values at 850 ℃ and 650 ℃, respectively

关 键 词： 热化学储能 太阳能热发电 蓄热 放热反应器 数值模拟

领　　域： [一般工业技术]