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Hydraulic and heat transfer characteristics in structured packed beds with methane steam reforming reaction for energy storage

Wang, Jingyu LU ; Yang, Jian LU ; Sunden, Bengt LU and Wang, Qiuwang (2021) In International Communications in Heat and Mass Transfer 121.
Abstract

Packed beds with methane steam reforming reaction (MSR) can be used as thermochemical storage devices. The packing configuration can have a significant effect on the flow distribution which will further influence the heat/mass transfer, dispersion and reaction characteristics. In the present paper, the hydraulic, dispersion, heat/mass transfer and the MSR reaction properties are investigated in packed beds with the simple-cubic (SC) packing, the body-centered cubic (BCC) packing and face-centered cubic (FCC) packing forms. ANSYS FLUENT integrated with user defined scalars (UDS) and user defined functions (UDF) are used to perform the simulations. Results show that firstly, the residence time distribution (RTD) can be used to evaluate... (More)

Packed beds with methane steam reforming reaction (MSR) can be used as thermochemical storage devices. The packing configuration can have a significant effect on the flow distribution which will further influence the heat/mass transfer, dispersion and reaction characteristics. In the present paper, the hydraulic, dispersion, heat/mass transfer and the MSR reaction properties are investigated in packed beds with the simple-cubic (SC) packing, the body-centered cubic (BCC) packing and face-centered cubic (FCC) packing forms. ANSYS FLUENT integrated with user defined scalars (UDS) and user defined functions (UDF) are used to perform the simulations. Results show that firstly, the residence time distribution (RTD) can be used to evaluate the dispersion property in packed beds where a narrower RTD curve reflects a more uniform velocity distribution with less dispersion. Secondly it is found that, regions with backflow are not beneficial for heat/mass transfer and chemical reactions from two aspects. One is that the heat transfer between the main fluid and the particle surfaces is weak and low temperature of the particles will reduce the reaction rates. The other is that the poor species transport will prevent the reactant to flow into the reaction region and the products cannot be taken away by the main flow timely, which will have a negative effect on the reaction. Thirdly, it is revealed that, the dimensionless variation of the residence time distribution (DVRTD) can reflect the heat/mass transfer and reaction performances, where a smaller DVRTD corresponds to better heat/mass transfer and higher reaction rates.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Heat/mass transfer, Methane steam reforming, Residence time distribution, Structured packed beds, Thermal storage
in
International Communications in Heat and Mass Transfer
volume
121
article number
105109
publisher
Elsevier
external identifiers
  • scopus:85099238332
ISSN
0735-1933
DOI
10.1016/j.icheatmasstransfer.2021.105109
language
English
LU publication?
yes
id
7fced49b-c6d2-4bcb-b30f-4750f5358a03
date added to LUP
2021-01-25 08:47:09
date last changed
2023-11-20 21:55:01
@article{7fced49b-c6d2-4bcb-b30f-4750f5358a03,
  abstract     = {{<p>Packed beds with methane steam reforming reaction (MSR) can be used as thermochemical storage devices. The packing configuration can have a significant effect on the flow distribution which will further influence the heat/mass transfer, dispersion and reaction characteristics. In the present paper, the hydraulic, dispersion, heat/mass transfer and the MSR reaction properties are investigated in packed beds with the simple-cubic (SC) packing, the body-centered cubic (BCC) packing and face-centered cubic (FCC) packing forms. ANSYS FLUENT integrated with user defined scalars (UDS) and user defined functions (UDF) are used to perform the simulations. Results show that firstly, the residence time distribution (RTD) can be used to evaluate the dispersion property in packed beds where a narrower RTD curve reflects a more uniform velocity distribution with less dispersion. Secondly it is found that, regions with backflow are not beneficial for heat/mass transfer and chemical reactions from two aspects. One is that the heat transfer between the main fluid and the particle surfaces is weak and low temperature of the particles will reduce the reaction rates. The other is that the poor species transport will prevent the reactant to flow into the reaction region and the products cannot be taken away by the main flow timely, which will have a negative effect on the reaction. Thirdly, it is revealed that, the dimensionless variation of the residence time distribution (DVRTD) can reflect the heat/mass transfer and reaction performances, where a smaller DVRTD corresponds to better heat/mass transfer and higher reaction rates.</p>}},
  author       = {{Wang, Jingyu and Yang, Jian and Sunden, Bengt and Wang, Qiuwang}},
  issn         = {{0735-1933}},
  keywords     = {{Heat/mass transfer; Methane steam reforming; Residence time distribution; Structured packed beds; Thermal storage}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{International Communications in Heat and Mass Transfer}},
  title        = {{Hydraulic and heat transfer characteristics in structured packed beds with methane steam reforming reaction for energy storage}},
  url          = {{http://dx.doi.org/10.1016/j.icheatmasstransfer.2021.105109}},
  doi          = {{10.1016/j.icheatmasstransfer.2021.105109}},
  volume       = {{121}},
  year         = {{2021}},
}