Energy storage efficiency analyses of CO2 reforming of methane in metal foam solar thermochemical reactor
Energy storage efficiency analyses of CO2 reforming of methane in metal foam solar thermochemical reactor
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DOI：
10.1016/j.applthermaleng.2016.10.025
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发表时间：
2017-01
影响因子：
6.4
通讯作者：
Wang Fuqiang;Cheng Ziming;Tan Jian-yu;Z. Jiaqi;Leng Yu;Liu Linhua
中科院分区：
文献类型：
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作者：
Wang Fuqiang;Cheng Ziming;Tan Jian-yu;Z. Jiaqi;Leng Yu;Liu Linhua
太阳能驱动的甲烷CO2重整可以将额外20%的太阳能集中储存为化学键合能量。为评估影响储能效率的关键操作参数，采用有限体积法（FVM）和热化学动力学相结合的方法，对泡沫金属热化学反应器中太阳能驱动的CO2甲烷重整反应性能进行了分析.采用用户自定义函数（UDF）编制了甲烷CO2重整LH反应动力学模型，以准确预测反应温度分布和气体组分摩尔分数。数值计算结果与新泻大学的实验结果进行了验证，以保证模型的准确性。分析了混合气入口速度、泡沫金属反应器孔隙率、CH 4/CO2比和热流密度分布对储能效率的影响，为太阳能驱动CO2甲烷重整的应用提供理论指导。计算结果表明，当CH 4/CO2比为0.67时，CO2重整甲烷的储能效率最大.
Solar driven CO2reforming of methane can store extra 20% concentrated solar energy to chemically bonded energy. With the aim to evaluate key operational parameters on energy storage efficiency, a finite volume method (FVM) coupled with thermochemical kinetics was developed to analyze the solar driven CO2methane reforming performance in a metallic foam thermochemical reactor. The LH kinetic model of CO2reforming of methane was compiled by user defined functions (UDFs) to exactly predict the temperature distribution and mole fractions of gas species. The numerical results were validated with experimental results which were tested in Niigata University to guarantee the accuracy of the developed model. Effects of gas mixture inlet velocity, porosity of metal foam reactor, CH4/CO2ratio and heat flux distribution on energy storage efficiency were analyzed for providing theoretical guideline to the application of solar driven CO2methane reforming. The numerical results indicated that maximum energy storage efficiency of CO2reforming of methane was found when the CH4/CO2ratio is 0.67.