OS4-2 ジメチルエーテルを燃料とする化学再生ガスタービンシステム用改質器の設計(OS4 省エネルギー・小型分散電源・コジェネ技術,分散と集中の共存)

概要

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Chemically Recuperated Gas Turbine (CRGT) fueled by Dimethyl Ether (DME), which is attracting attention as an alternative fuel for versatile use, has been developed as the project funded by METI since 2002FY, and this project is scheduled to conduct a demonstration test using 30kW Micro Gas Turbine (MGT). To use for DME steam reformer that is the key component of the CRGT system, 0.5wt%-Pt catalyst supported by γ-alumina was selected by LHV increase of reformed gas related to four reactions of DME hydrolysis, methanol decomposition, CO shift and methanation. The reformer installed directly in the exhaust duct with superheater, evaporator, DME preheater and economizer was designed by the numerical analysis code modeling the catalyst packed-bed as axisymmetric pseudohomogeneous media and combining conservation equations of mass, momentum, energy and seven chemical species using the reaction rate equations. The reformer designed to fit into the MGT consisted of 96 SS316-tubes, top and bottom headers and rectangular duct, and its heat recovery and LHV increase at the outlet was estimated to be 25kW and 8.0%, respectively.
一般社団法人日本機械学会の論文
2006-06-28