Heat transfer and thermodynamic processes in coal-bearing strata under the spontaneous combustion condition
Simulations and experiments have been carried out to investigate heat transfer and thermodynamic processes in coal-bearing strata in order to quantitatively understand the development of underground coal fires under the spontaneous combustion condition. With the controlled temperature and under lean...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Wang, Yanming [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017 |
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| Rechteinformationen: |
Nutzungsrecht: © 2017 Taylor & Francis 2017 |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Numerical heat transfer / A - Washington, DC : Taylor & Francis, 1989, 71(2017), 1, Seite 1-16 |
|---|---|
| Übergeordnetes Werk: |
volume:71 ; year:2017 ; number:1 ; pages:1-16 |
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| DOI / URN: |
10.1080/10407782.2016.1243978 |
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| 520 | |a Simulations and experiments have been carried out to investigate heat transfer and thermodynamic processes in coal-bearing strata in order to quantitatively understand the development of underground coal fires under the spontaneous combustion condition. With the controlled temperature and under lean oxygen conditions, the thermodynamic parameters for coal oxidation at different stages are experimentally determined in combination with the simultaneous thermal analysis. A combined heat transfer model of conduction, convection, and radiation with finite reactions is developed for the porous coal and rocks. The temperature distributions in the coal and roof strata at different times are simulated based on the single- and two-stage kinetic models, respectively, and compared with field geophysical prospecting. Effects of oxidation kinetic properties due to coal metamorphism on propagation of coal fires are examined. It reveals that a significant step change exists during the thermal process of coal fire caused by two-stage oxidation, and the coal rank of occurrence directly determines the spontaneous combustion period of underground coal fire. | ||
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Heat transfer and thermodynamic processes in coal-bearing strata under the spontaneous combustion condition |
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Simulations and experiments have been carried out to investigate heat transfer and thermodynamic processes in coal-bearing strata in order to quantitatively understand the development of underground coal fires under the spontaneous combustion condition. With the controlled temperature and under lean oxygen conditions, the thermodynamic parameters for coal oxidation at different stages are experimentally determined in combination with the simultaneous thermal analysis. A combined heat transfer model of conduction, convection, and radiation with finite reactions is developed for the porous coal and rocks. The temperature distributions in the coal and roof strata at different times are simulated based on the single- and two-stage kinetic models, respectively, and compared with field geophysical prospecting. Effects of oxidation kinetic properties due to coal metamorphism on propagation of coal fires are examined. It reveals that a significant step change exists during the thermal process of coal fire caused by two-stage oxidation, and the coal rank of occurrence directly determines the spontaneous combustion period of underground coal fire. |
| abstractGer |
Simulations and experiments have been carried out to investigate heat transfer and thermodynamic processes in coal-bearing strata in order to quantitatively understand the development of underground coal fires under the spontaneous combustion condition. With the controlled temperature and under lean oxygen conditions, the thermodynamic parameters for coal oxidation at different stages are experimentally determined in combination with the simultaneous thermal analysis. A combined heat transfer model of conduction, convection, and radiation with finite reactions is developed for the porous coal and rocks. The temperature distributions in the coal and roof strata at different times are simulated based on the single- and two-stage kinetic models, respectively, and compared with field geophysical prospecting. Effects of oxidation kinetic properties due to coal metamorphism on propagation of coal fires are examined. It reveals that a significant step change exists during the thermal process of coal fire caused by two-stage oxidation, and the coal rank of occurrence directly determines the spontaneous combustion period of underground coal fire. |
| abstract_unstemmed |
Simulations and experiments have been carried out to investigate heat transfer and thermodynamic processes in coal-bearing strata in order to quantitatively understand the development of underground coal fires under the spontaneous combustion condition. With the controlled temperature and under lean oxygen conditions, the thermodynamic parameters for coal oxidation at different stages are experimentally determined in combination with the simultaneous thermal analysis. A combined heat transfer model of conduction, convection, and radiation with finite reactions is developed for the porous coal and rocks. The temperature distributions in the coal and roof strata at different times are simulated based on the single- and two-stage kinetic models, respectively, and compared with field geophysical prospecting. Effects of oxidation kinetic properties due to coal metamorphism on propagation of coal fires are examined. It reveals that a significant step change exists during the thermal process of coal fire caused by two-stage oxidation, and the coal rank of occurrence directly determines the spontaneous combustion period of underground coal fire. |
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Heat transfer and thermodynamic processes in coal-bearing strata under the spontaneous combustion condition |
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http://dx.doi.org/10.1080/10407782.2016.1243978 http://www.tandfonline.com/doi/abs/10.1080/10407782.2016.1243978 http://search.proquest.com/docview/1859448072 |
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Shi, Guoqing Guo, Zhixiong |
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Shi, Guoqing Guo, Zhixiong |
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10.1080/10407782.2016.1243978 |
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