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    <title>Transport Research International Documentation (TRID)</title>
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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Transport Research International Documentation (TRID)</title>
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      <title>OPERATIONAL CONSIDERATIONS FOR DESIGNING MACHINERY AFT CONDENSER-CONDENSER SCOOP SYSTEMS</title>
      <link>https://trid.trb.org/View/145828</link>
      <description><![CDATA[Condenser scoops have attractive features for circulating cooling seawater through the main condenser.  Further developments are required, however, to enable the designer to fully utilize the simplification and cost reduction attributed to the scoop system.  Therefore this paper reviews recent machinery-aft condenser installations, developments in inlet and outlet scoop designs, and boundary-layer measurements at the outlet scoop locations of a 91,000-dwt and a 160,000-dwt tanker.  A rational approach based on Hotta's formulation is discussed for estimating the effects of seawater temperature, condenser tube fouling, and reduced scoop flow during operation on the condenser vacuum. A simulation study using the Hampton Maru service data is presented to illustrate this approach.  Relevant experience in condenser corrosion and fouling is also reviewed and a proposal for using Campbell's condenser tube tester in shipboard condenser corrosion and fouling research is presented.]]></description>
      <pubDate>Wed, 07 Nov 1979 00:00:00 GMT</pubDate>
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    <item>
      <title>APPLICATION OF CONDENSER SCOOP COOLING SYSTEM FOR STEAM TURBINE (IN HAMPTON MARU, ETC)</title>
      <link>https://trid.trb.org/View/61216</link>
      <description><![CDATA[Sumitomo have built a series of five 168,000-dwt ore/coal/oil carriers since 1971, each of them with a scoop cooling system for the main condenser.  Test results of the system, from the sea trials of Hampton Maru, the first ship of the series, were published in 1972.  In the present article, the further development of this scoop system during the building of the series is described.  To obtain the most suitable configuration, in respect of important variables such as cooling pipe diameter, lip-length/pipe-diameter ratio, and outlet angle, the system was modified in the four later ships on the basis of the results obtained in the previous ship or ships.  The article also reports on the performance of the system in the Hampton Maru in her first twelve months' service, during which the cooling-water flow decreased because of hull fouling.  Order from: BSRA as No. 46,726.]]></description>
      <pubDate>Tue, 14 Mar 1978 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/61216</guid>
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      <title>A STUDY OF MACHINERY AFT CONDENSER SCOOP INSTALLATION IN MANEUVERING</title>
      <link>https://trid.trb.org/View/41241</link>
      <description><![CDATA[The turning response of the condenser circulation system in a machinery aft installation was studied using computer simulations with data from wind tunnel tests of a model scoop systems installed in the stern of a 2.5 m tanker double model.  These results agree qualitatively with the HAMPTON MARU scoop performance measurements in which a rise in the system's pressure was observed shortly after turning.  The role the flow into the inlet plays in this pressure rise is described by the bow, side, and breakdown regions defined by the drift angle and derived from the ship's L/B ratio.  Improvement of the inlet scoop performance was obtained by fitting a boundary layer fence.  The interaction of the outlet scoop jet with the stern flow was visualized.  The calculated flow pattern is compared to the flow around the stern of the double model at various drift angles.]]></description>
      <pubDate>Fri, 14 May 1976 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/41241</guid>
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    <item>
      <title>HYDRODYNAMIC CONSIDERATIONS IN THE DESIGN OF CONDENSER COOLING WATER SYSTEMS FOR LARGE SHIPS</title>
      <link>https://trid.trb.org/View/19933</link>
      <description><![CDATA[The performance of intakes and outlets for main condenser cooling water systems are discussed.  Water tunnel test results are given that show the relative performance of two intake types and the effect of grilles and yawed flow on them.  Some boundary layer fences for improving intake performance are also described.  The importance of choosing the best positions of the hull for intakes and outlets are discussed and a means of calculating the drag and power expenditure caused by cooling water systems is given. /AUTHOR/]]></description>
      <pubDate>Fri, 16 Aug 1974 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/19933</guid>
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    <item>
      <title>DESIGN STUDY OF CONDENSER AND CIRCULATION SYSTEM</title>
      <link>https://trid.trb.org/View/490</link>
      <description><![CDATA[Economical performance of steam condensers is controlled largely from the drawing board and computer room; not by the ships crew.  The design characteristics of the condenser and circulation system determine condenser performance, except for the effect of tube cleanliness.  Sea water for the circulation system varies from 35 to 82.5 degrees Fahrenheit over a wide range of commercial trade routes.  However, on certain routes the variation is from 35 to 60 degrees; on others 65 to 82.5 degrees.  A survey was made of sea water 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.]]></description>
      <pubDate>Sun, 30 Dec 1973 00:00:00 GMT</pubDate>
      <guid>https://trid.trb.org/View/490</guid>
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