کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6475382 1424969 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimation of the structure-related share of radiation heat transfer in a carbonised packed coal bed
ترجمه فارسی عنوان
برآورد سهم مربوط به ساختار انتقال حرارت تابش در یک تخت زغال سنگ بسته بندی شده کربن دار
کلمات کلیدی
زغال سنگ، کک، شکسته شدن طول مسیر نوری، آنیزوتروپیک حرارتی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


- A model of fissuring was developed to analyse radiation heat transfer in a coke layer.
- A significant thermal anisotropy of fissured coke layer was pointed out.
- Thermal conductivity of coke bed is a function of temperature and the process stage.
- Fissure development strongly increases effective thermal conductivity of coke.

The contribution of radiation to heat transfer in a packed bed of coal during its thermal decomposition in a coke oven chamber has been investigated. The phenomenon was analysed while considering the structure change that the coal experiences. The study focused on the increased role of radiation in the processing stage following coal re-solidification. This is when the macrocracks begin to propagate. A simple fissure development model was proposed to describe the influence of varying textures of coke oven charge on the heat transfer process. The results show that the length of fissures penetrating the coke layer perpendicularly to an oven wall is the main factor affecting heat transport due to radiation. This leads to a significant increase in effective thermal conductivity of the coke layer. The work underlines an anisotropic character of thermal radiation in carbonisation beds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 195, 1 May 2017, Pages 243-252
نویسندگان
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