Power Recovery and the Eddy Current Brake

Some refineries that had not previously eonsidered power reeovery, have suddenly re-evaluated the eeonomies with respeet to their operations. Although they do not desire to replaee their present motor or steam turbine driven eompressors, they do want power reeovery for eleetrie power generation. This would permit eommereial or eo-gen power to be produeed, or might simply reduee the load on the eompressor drive motor. 

Prevent runaway of the string in the case of a generator load loss. The large amount of available energy upstream of the expander must be dissipated. 

Control acceleration of the string during an afterburn condition. The available energy of the string is increased as a result of higher inlet temperatures. 

Have a means of bringing the unit up to the design speed. In the case of a synchronous generator, this speed control must be precise for synchronization. 

Having earlier deseribed the three funetions aeeommodated by eddy eurrent brakes, the following examines how the brake performs in eaeh eireumstanee. 

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