数値解析による噴流床石炭ガス化炉内現象評価技術(<特集>火力発電分野における数値流体力学(CFD: Computational Fluid Dynamics)活用の最前線)

概要

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Coal is one of the most important energy sources from the viewpoint of energy security in Japan, because coal is a deposit-rich and ubiquitous energy resource, and has an economic advantage compared with other fossil fuels. At the same time, the coal has a weak-point that the amount of carbon dioxide emitted by coal combustion is larger than by other fossil fuels. IGCC (Integrated coal Gasification Combined Cycle) is one of the best solutions to these problems, and the coal gasifier is a core technology of IGCC. It is necessary to understand the phenomena in the coal gasifier for design and operation, but it is not easy to measure locally the state and physical quantity with accuracy. In such situation, the numerical simulation approach serves as a prediction and evaluation technique for the phenomena. A numerical simulation of entrained flow coal gasifier is carried out, by means of an empirically modeling for each dominant phenomenon in coal gasifier such as the reactivity of coal or adhesive property of ash particle. So the results of a simulation show good agreement with experimental results that the simulation will be useful for design support and optimization of operation condition. As the next step, an application of the simulation technique to a monitoring technology of gasifier and an investigation into the cause of the troubles will be expected.
一般社団法人日本エネルギー学会の論文
2004-05-20