Numerical modeling of homogeneous gas and heterogeneous char combustion for a wood-fired hydronic heater
Numerical modeling of homogeneous gas and heterogeneous char combustion for a wood-fired hydronic heater
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燃木循环加热器均质气体和非均质炭燃烧的数值模拟
DOI:
10.1016/j.renene.2018.07.087
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发表时间:
2019
期刊:
影响因子:
8.7
通讯作者:
DesJardin, Paul E.
中科院分区:
文献类型:
--
作者:
Richter, Joseph P.;Weisberger, Joshua M.;Bojko, Brian T.;Mollendorf, Joseph C.;DesJardin, Paul E.
The pyrolysis of woody fuels produces two main products-pyrolysis gases and solid residue char which undergo homogeneous and heterogeneous reactions, respectively. Recent experimental measurements using a two-stage hydronic heater indicate the oxidization of these two products occur at distinctly different time scales with the pyrolysis gases burning immediately, and the majority of the char oxidization occurring later. In this study, these two oxidation pathways are explicitly accounted for in a numerical model that considers a non-homogeneous mixture of product flue gases. The model is based on a three-zone description of the heater which accounts for combustion and heat transfer using well-stirred reactor theory. The first zone describes the gasification of the wood fuel and burning of both pyrolysis gases and char. The second zone represents an after-burning stage. The last stage accounts for the transport of gases out the flue. Model predictions of O 2, C O 2, C O, H 2 O and temperature are compared to experimental measurements showing good overall agreement. Furthermore, the dual oxidation pathway description of combustion is shown to be critical to account for the dual-peak C O time signature. The first peak is associated with the burning of pyrolysis gases and the second corresponds to char oxidation.
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影响因子:
8.7
作者:
J. P. Richter;Brian T. Bojko;J. Mollendorf;P. DesJardin
通讯作者:
P. DesJardin
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
A. Ryfa;R. Buczyński;Michał Chabiński;A. Szlęk;R. Białecki
通讯作者:
R. Białecki
影响因子:
7.4
作者:
Teeranai Pattanotai;Hirotatsu Watanabe;K. Okazaki
通讯作者:
Teeranai Pattanotai;Hirotatsu Watanabe;K. Okazaki
DOI:
--
发表时间:
1959
期刊:
影响因子:
--
作者:
D. Villars
通讯作者:
D. Villars
影响因子:
8.7
作者:
J. P. Richter;Joshua M. Weisberger;J. Mollendorf;P. DesJardin
通讯作者:
P. DesJardin