Equivalent resistance network modeling for reforming micro-reactor with porous fibrous structure

doi:10.3785/j.issn.1008-973X.2021.02.007

Journal of ZheJiang University (Engineering Science)

2021, Vol. 55

Issue (2): 271-279 DOI: 10.3785/j.issn.1008-973X.2021.02.007

Equivalent resistance network modeling for reforming micro-reactor with porous fibrous structure

Zhi-jia XU(

),Chang-lin YU,Qing-hui WANG*(

)

School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China

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Abstract

An equivalent resistance network model for randomly distributed micro-channels in porous fibrous structure (PFS) was established, aming at the efficient analysis problem of flow velocity field for PFS that used in micro-reactor for hydrogen production by reforming. The complex and randomly-connected micro-channels for fluid flow in PFS, as well as the inlet and outlet manifolds of PFS, were simplified as regular network based on the statistical network developed for complex and random fibrous structure. An equivalent resistance network model for PFS was developed in the light of Kirchhoff’s law, and the solution method was determined. The proposed method was validated by comparing with a previously developed computational fluid dynamics (CFD) approach. Results indicated that, the Pearson correlation coefficient between the velocity distributions of PFS obtained by the two methods was about 98%, while the efficiency of the proposed method was about 2.9×10⁴ times that of CFD approach. In this way, a superior supportive technology for the design and fabrication of micro-reactor with PFSs for hydrogen production via reforming was provided.

Key words： hydrogen production by reforming porous fibrous structure equivalent resistance network velocity field high efficiency

Received: 03 July 2020 Published: 09 March 2021

CLC:

TK 91

Fund: 国家自然科学基金资助项目（51875210，51775192）；广东省自然科学基金资助项目（2018B030311032）；广州市科技计划资助项目（201804010420）；聚合物成型加工工程教育部重点实验室开放课题资助项目（KFKT1804）；中央高校基本业务费资助项目（2019ZD25）

Corresponding Authors: Qing-hui WANG E-mail: mexzj@scut.edu.cn;wqh@scut.edu.cn

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Cite this article:

Zhi-jia XU,Chang-lin YU,Qing-hui WANG. Equivalent resistance network modeling for reforming micro-reactor with porous fibrous structure. Journal of ZheJiang University (Engineering Science), 2021, 55(2): 271-279.

URL:

http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2021.02.007 OR http://www.zjujournals.com/eng/Y2021/V55/I2/271

多孔纤维型重整微反应器的等效电阻网络建模

针对应用于重整制氢微反应器的复杂多孔金属纤维载体（PFS）的流速场高效分析难题，建立载体中随机微通道的等效电阻网络分析模型. 基于复杂随机纤维结构的统计网络模型，将纤维载体中三维联通的随机微通道结构及与之相连的进出口腔简化为规则的网络通道结构.借鉴基尔霍夫定律，建立纤维载体的等效电阻网络模型，并确定求解方法. 纤维载体流速场实例分析的结果表明，基于等效电阻网络模型求解的纤维载体流速场与计算流体力学(CFD)方法的结果之间的皮尔森相关系数约为98%，且求解效率约为CFD方法的2.9×10⁴倍. 研究成果为多孔纤维型重整制氢微反应器的设计制造提供了新的支撑方案.

关键词： 重整制氢, 多孔纤维, 等效电阻网络, 流速场, 高效

Fig.1 Preparation process, optical and SEM images of porous fibrous structure

Fig.2 Methanol steaming reforming micro-reactor based on porous fibrous structure

Fig.3 Schematic of statistic network of random fibrous structure

Fig.4 Fluid flow micro-channel network of porous fibrous structure

Fig.5 Network model of fluid flow channel in output manifold

Fig.6 Complete fluid flow micro-channel network of porous fibrous structure

Fig.7 Schematic of equivalent resistance network model for fluid flow micro-channel of porous fibrous structure

Fig.8 Schematic of equivalent resistance network model of output manifold

Fig.9 Complete equivalent resistance network model of porous fibrous structure

Fig.10 Comparison between velocity distributions obtained based on equivalent resistance network and CFD

Tab.1 Pearson correlation between velocity distributions obtained based on equivalent resistance network and CFD

Tab.2 Information of velocity distributions obtained based on equivalent resistance network and CFD


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