The design of 220 Mwe CAES commerical turbine machinery is well known to many U.S. Utilities. Not as well known is the design and expected performance of smaller size CAES units in the 45 to 100 MWe size range. The attributes of the machinery for the smaller sizes are described in this paper. Both the 220 MWe size as well as the smaller sizes are patterned after the successfully operating BBC Brown Boveri designed and fabricated CAES turbine installed at Huntorf, West Germany.
A CAES plant consists of three (3) major systems; the turbomachinery train, the underground air storage chamber and the balance of plant. The turbomachinery train and the underground air storage chamber interrelationship needs to be optimized with respect to performance and cost while the balance of plant supports this relationship and is dependent upon the site conditions. The qualitative relationship between the air storage chamber and the operation of the turbomachinery train have been reported in the literature. This paper takes a salt dome geology and examines the factors affecting optimization of a 100 MWe CAES plant design.
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