once-through boiler
once-through boiler
[′wəns ¦thrü ‚bȯil·ər] (mechanical engineering)
A boiler in which water flows, without recirculation, sequentially through the economizer, furnace wall, and evaporating and superheating tubes.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.