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The two-fluid cycle is considered for municipal solid waste (MSW) -burned electric power generation, using six kinds of working fluid such as NH3, C5H12, C6H6, and H2O at the bottoming cycle. The performance characteristics of the two-fluid cycle are obtained at topping steam temperatures of 395 and 495°C. The optimum cycle conditions, which maximize the plant's thermal efficiency, are determined for the respective working fluid. It is shown that the plant's thermal efficiency of the two-fluid cycle was increased to 25.3% from 19.0%, using C6H6 as the working fluid under the main steam temperature of 395°C by superheating the bottoming vapor.

The two-fluid cycle is considered for municipal solid waste-(MSW) burnt electric power generation, using five kinds of working fluid such as NH3, C5H12 and C6H6 at the bottoming cycle, which are different from water at the topping cycle. The performance characteristics of the two-fluid cycle are obtained and the optimum cycle conditions, which maximize the plant thermal efficiency, are determined for the respective working fluid. Further, the effects of the parameters such as the terminal temperature difference of the heat exchanger and superheating on the thermal efficiency are clarified. It is shown that the plant thermal efficiency was increased to 19.7% from 17.6% by the adoption of the two-fluid cycle using C6H6 as the working fluid and could be improved further by superheating the main vapor at the bottoming side and by preheating the feed-liquid using the bleeding vapor in the bottoming turbine.