RESULTS OF STUDIES ON APPLICATION OF CCMHD TO ADVANCED FOSSIL FUEL POWER PLANT CYCLES

摘要

An analysis was conducted to assess the potential for application of a Closed Cycle MHD disk generator (CCMHD) in advanced fossil fuel power generation systems. Cycle analyses were conducted for a variety of candidate power cycles, including a simple cycle CCMHD plant; a cycle combining CCMHD and gas turbines; and a triple combined cycle including CCMHD, gas turbines, and steam turbines. All of the above cycles have been previously considered in cycle studies reported by Japanese researchers. Also considered was a CCMHD cycle incorporating thermochemical heat recovery through reforming of the fuel stream, which is to our knowledge the first consideration of this approach. The results of the study show that CCMHD combined cycles can provide thermodynamic efficiency that is competitive with advanced concepts being evaluated by the U.S. Department of Energy. The CCMHD simple cycle with fuel reforming had the highest efficiency of all cycles studied, with a calculated thermal efficiency (LHV) of 66.2% for methane fuel using a baseline set of assumptions.