OPTIMUM MAGNETS FOR MHD GENERATORS

The purpose of this study is to define the areas of applicability for permanent, conventionally cooled resistive, cryogenically cooled resistive, and superconductive magnets to open cycle MHD power generation systems. The selection of magnet types for stationary and mobile systems as well as for short and long duration systems is made. The results of the investigation are presented in summary form for three types of MHD generators. These results are plotted on power duration and net power output coordinates to show the economical operating regimes of the various types of magnets. Both a weight and cost optimum regime are shown for the entire MHD generator operating range. The most significant result of the analysis is that high-purity aluminum magnets cooled with liquid hydrogen exhibit a wide range of application from both a cost and weight standpoint. (Author) Prepared for presentation at the International Symposium on Generation 4-8 July, 1966, Saltzburg, Austria.