摘要
通过实验测得反应器入口太阳辐射边界条件,并进行10 kW级反应器及开口处二次聚光器设计。通过考虑辐射和对流热损失的零维模型,结合滞留时间和反应器容积规律确定了开口腔最优直径为7 cm,长度为0.28 m,设计温度为2200 K,并设计了不同的聚光器结构。之后进行不同运行参数下反应器效率和产气规律研究。结果表明对流热损失占总热损失中最大部分,随着颗粒进料速率的增加,反应器工作温度和辐射热损失都降低,而出口气体的显热增加。增加保温措施降低了对流热损失,却增大了辐射热损失、反应腔温度以及可回收显热。反应器最大效率为71.2%,最大化学能效率为31.4%。
Solar thermochemical reator is the core equipment of solar fuel production,which can produce high-value syngas cleanly and efficiently,and reduce greenhouse gase emissions.In this study,the solar radiation boundary condition of the thermochemical reactor is measured by experiments,and then the design of a 10 kW solar thermochemical reactor for solar CO;-gasification with compound parabolic concentrator is presented.The optimal radius and length for reactor are analyzed based on a zero-dimensional model considering radiative and convective heat loss,and the optimal length is determined by the relationship between residence time and reactor volume.At the given experimental solar radiation boundary condition,the diameter of the reactor is 7 cm and the design working temperature is 2200 K.At last,the steady lumped heat capacity model is used to identify the optimal operational conditions for the maximum solar to chemical energy conversion efficiency.The results show that convective heat loss is dominant in the total heat loss.Besides,with the increase of carbon particle mass flow rate,the reactor working temperature and radiative heat loss decreases significantly,while the sensible heat of the outlet gas increases.The improvement in thermal insulation will decrease convective heat loss,however the radiative heat loss and sensible heat will increase.The maximum reactor efficiency is 71.2% and the maximum chemical efficiency is 31.4%.
作者
常哲韶
赵东明
李鑫
代少猛
常春
Chang Zheshao;Zhao Dongming;Li Xin;Dai Shaomeng;Chang Chun(Institute of Electrical Engineering,Chinese Academy of Sciences,Beijing 100190,China;China Huaneng Group Co.,Ltd.,Beijing 100031,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2021年第10期160-167,共8页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(51806209)
国家重点研发计划(2018YFB1502005)。
关键词
太阳能
气化
热化学反应器
设计
模拟
solar energy
gasification
thermochemical reactor
design
simulation
