Abstract
Economical performance of steam condensers is controlled largely from the drawing board and computer room; not by the ship's crew. The design characteristics of the condenser and circulation system determine condenser performance, except for the effect of tube cleanliness. Seawater for the circulation system varies from 35 to 82.5 F over a wide range of commercial trade routes. However, on certain routes the variation is from 35 to 60 F; on others 65 to 82.5 F. A survey was made of seawater temperatures for selected trade routes, and results plotted graphically for design guidance. Study has been directed toward design of condensers and circulation systems for special-purpose and for universal-type ship operations. A series pump-scoop arrangement is proposed to provide favorable control of flow through condenser. Variations in condenser and circulation system design are evaluated by a life-cycle cost analysis. A computer program for calculating condenser design characteristics, for checking condenser performance, and for analyzing scoop performance is appended.
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