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Heat Transfer Research
インパクトファクター: 0.404 5年インパクトファクター: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN 印刷: 1064-2285
ISSN オンライン: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v34.i5-6.30
8 pages

Using a Porous Segment to Increase Thermal Efficiency by Converting Gas Enthalpy to Thermal Radiation in High-Temperature Industrial Furnaces

Kamel Hooman
Mechanical Engineering Department, Persian Gulf University, Bushehr 75168, Iran
Mofid Gorji-Bandpy
University of Mazandaran
M. Mahdavi-Hezaveh
Renewable Energy Ward, Atomic Research Center, Tehran, Iran

要約

In this paper, effect of a porous segment in the outlet of a hightemperature one-dimensional duct such as an industrial furnace is investigated numerically. The target was to increase the efficiency of these furnaces containing high-temperature gases by undertaking energy conversion and to recover the energy of the gas flows inside the duct. Enthalpy of high-temperature gas was converted to thermal radiation by means of this porous segment. The two-flux method was taken into account for this problem and to perform the numerical procedure the forth order Runge–Kutta scheme was utilized. The porous layer was supposed to have a high-porosity causing a high area/volume ratio and also it was considered highly emissive to radiate absorbed convective energy. Solving the energy equation numerically along and outside the porous segment simultaneously, it was shown that a huge part of convective energy could be converted to recovered energy in the form of thermal radiation. It was shown that due to massive difference between the inlet and outlet temperature of the porous segment, heat could be transferred to upstream. Also it was seen that, the more optic length is the higher efficiency is gained.


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