超临界碳氢燃料蒸汽重整一维模型研究

One Dimensional Numerical Model of Supercritical Hydrocarbon Steam Reforming

关键词:  超临界  碳氢燃料  蒸汽重整  数值模拟  一维模型  化学热沉

Key words:  Supercritical  Hydrocarbon fuel  Steam reforming  Numerical simulation  One-dimensional model  Chemical heat sink

摘要:

为了获得关键参数对超临界碳氢燃料蒸汽重整化学热沉分布特性的影响，建立了超临界碳氢燃料蒸汽重整非稳态一维计算模型，通过与实验数据的对比验证了模型的准确性，并基于该模型采用RP-3的四组分替代模型对RP-3蒸汽重整过程中入口流速、压力和含水量等关键参数对热沉沿流向分布特性的影响进行了研究。结果表明：随着入口流速的增加，蒸汽重整反应化学热沉的峰值减小，且出现峰值的位置逐渐向出口移动。随着压力的升高，相同位置处的化学热沉都减少，但是出现峰值的位置不变。在入口含水量由5%增大到12%的过程中，微通道同一位置处的化学热沉增大，且化学热沉的最大值也是增大的，峰值出现的位置向微通道出口移动。

Abstract:

To obtain the effects of operation parameters on the chemical heat sink distribution characteristics of supercritical hydrocarbon steam reforming， a transient one-dimensional supercritical hydrocarbon fuel steam reforming model is established， and the accuracy is verified by comparing with the experimental data. Based on this model， a four-component substitution model of RP-3 was used to study the effects of key parameters such as inlet flow rate， pressure and water content on the distribution characteristics of chemical heat sink along the flow direction in RP-3 steam reforming. It is indicated that as the inlet velocity increases， the peak value of the chemical heat sink decreases， and the location of the peak value moves towards the outlet. As the operation pressure increases， the chemical heat sink of steam reforming decreases at the same location， but the location of the peak value remains the same. Moreover， as the water content increases from 5% to 12%， the chemical heat sink increases at the same location， and the peak value of the chemical heat sink increases， the location of the peak value moves towards the outlet.