Experimental Study of MHD Power Generation

概要

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An MHD generator, with constant flow sectional area of 50×120 mm and active length of 1 000 mm, was constructed and experiments were conducted using combustion gas as working fluid. Generator channel was composed of MgO insulating walls and 20 segmented graphite electrode pairs and magnetic field of 14 kG was applied. Voltage, current, and output power characteristics were investigated under various conditions and maximum output of 17 kW was obtained at 7 MW input. The analysis of the generator was done assuming one-dimensional flow and the results were compared with experiment. As to induced voltage, theoretical and experimental results showed good agreement, but there was substantial discrepancy as to current and output power. By esimating, however, the electrical conductivity of gas lower than the theoretical value, agreement was improved. From this it may be concluded that, apart from the problem of electric conductivity of gas, the one-dimensional hydraulic flow analysis of channel represents the reality fairly well even on this scale of generator.
一般社団法人日本機械学会の論文