双轴跟踪太阳能驱动甲醇分解的动力系统研究  

Investigations of Methanol Decomposition System Driven by Solar Energy With Double Dimensions Tracking

作　　者：王肖禾 刘启斌[1,2] 方娟 刘泰秀 WANG Xiao-He;LIU Qi-Bin;FANG Juan;LIU Tai-Xiu(Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院大学,北京100049

出　　处：《工程热物理学报》2020年第4期777-782,共6页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51722606,No.51236008)。

摘　　要：提出了一种双轴跟踪的中低温太阳能甲醇分解与化学回热耦合的动力系统。集热单元采用双轴跟踪的抛物槽式集热器;利用导热油吸收中低温太阳能和烟气余热从而间接分解甲醇;所生成的合成气进入燃气轮机燃烧作功,烟气驱动制冷和供热,实现冷热电输出。镜场采用双轴跟踪,余弦损失消除,集热效率得以提升。通过系统集成,将烟气余热和中低温太阳能转化为化学能,能量品位提高,并且化学回热作为中低温太阳能的备用能源技术,有利于系统稳定运行,延长系统运行时间。在设计工况下,系统的一次能源利用率为78.55%,太阳能净发电效率达22.61%。研究结果为高效利用太阳能提供了有效途径。A methanol decomposition system driven by double dimensions tracking solar energy integrated chemical recuperation is proposed in this work.The parabolic trough collector with double dimensions tracking is employed in the collection unit,in which the synthetic oil absorbs the mid-and-low temperature solar energy to decompose the methanol indirectly.Then,the syngas produced by methanol decomposition enters the gas turbine to generate power,and the flue gas drives operations of chemical recuperation,refrigeration and heating.The utilization of double dimensions tracking in the solar field improves the collection efficiency by offsetting the cosine loss.Furthermore,the solar energy and the exhausted heat recovered by the synthetic oil are converted into the chemical energy,which enhances the energy level,realizes stable operation and prolongs running time of the system.On design condition,the primary energy efficiency and solar-to-electrical efficiency can reach to 78.55%and 22.61%respectively,which provides an effective way to utilize solar thermal energy.

关 键 词：中低温太阳能 甲醇分解 化学回热 双轴跟踪 

分 类 号：TK121[动力工程及工程热物理—工程热物理]