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"The accumulator may consist of a large tank in which are numerous plates over which water can flow, or may contain simply water rapidly circulated by artificial means. As the exhaust steam from the engine enters this accumulator, it spreads out over the exposed water surface, and some of it is condensed if there is an excess of pressure due to more steam being supplied by the exhaust than is being utilized by the turbine." —Derr, 1911

Interior View of Rateau Accumulator

"The accumulator may consist of a large tank in which are numerous plates over which water can flow,…