ガス燃焼流動層とその層内熱伝達におけるふく射の寄与についての実験的研究

概要

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Radiation contribution to the total heat transfer at the immersed surface in high-temperature fluidized beds has been a controversial subject. Some investigators have reported that it is significant, and others say it is not. The controversy has resulted from the ambiguity of the specification of the temperatures of the beds and heat transferring surfaces. Most experiments were conducted in a combustion fluidized bed with water-cooled tubes immersed in the beds. Radiation effects might not appear when the surface temperatures are low, even if the bed temperatures are high. In this report, a gas-cooled thin tube was immersed in a gas combustion fluidized bed, in order to keep both the bed and tube temperatures high enough to observe the radiation effects. The results show that the radiation contribution to total heat transfer becomes significant as both the tube and bed temperatures increase. The transient temperature profiles and the characteristics of the exhaust gas of the gas combustion fluidized bed are also reported.
一般社団法人日本機械学会の論文
1992-11-25