Lessons learned from the design and operation of the integrated topping cycle MHD generator

Lessons learned from the design and operation of the Integrated Topping Cycle MHD generator are presented. This generator is part of a 50 MWt prototypic powertrain which recently completed proof-of-concept testing at the U.S. Department of Energy`s Component Development and Integration Facility. Duration testing was performed at conditions representative of future commercial MHD power plant operation in order to establish component lifetimes and to verify the design performance parameters. Over 500 cumulative hours of thermal and power tests were obtained with the generator hardware before the program was terminated. This paper summarizes the various lessons learned during the design and operation of the prototypic MHD power generator. Worthwhile features that should be adopted in future generator designs are discussed, as well as things one would do differently. Some issues remain unresolved at the conclusion of the test program; these are also summarized.