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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>AN ECONOMIC ASSESSMENT OF FLUIDIZED BED BOILERS IN AUSTRALIAN MERCHANT SHIPS</title>
      <link>https://trid.trb.org/View/152543</link>
      <description><![CDATA[Fluidized-bed boiler systems have sparked the enthusiasm of many in the past few years as an answer to many technological problems as alternate energy sources are investigated.  Although still barely out of the experimental stage, ship designers are mooting the possibility of fluidized-bed combustion technology being applied in ship propulsion.  This paper outlines briefly its process and discusses the economics of such a venture.]]></description>
      <pubDate>Tue, 22 Apr 1980 00:00:00 GMT</pubDate>
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      <title>LOW EXCESS AIR, HIGH PERFORMANCE COMBUSTION SYSTEM FOR MARINE BOILERS</title>
      <link>https://trid.trb.org/View/62066</link>
      <description><![CDATA[A design study was performed on low excess air combustion systems for a marine boiler having a nominal rating of 100,000 pph at 955 F, 875 psig.  Two combustion configurations were selected for detailed evaluation consisting of (a) a staged furnace containing three combustion zones separated by a novel air introduction means, and (b) a conventional furnace configuration with massive recirculation burners.  Based on earlier experimental work, excess air levels were predicted at less than 1% and less than 5%, respectively.  The principal advantage expected due to low excess air is a reduction in the cost of maintenance and an improvement in overall performance.  The staged combustion process offered the additional advantage of uniform velocity and temperature profiles to the superheater.  An economic evaluation reveals that for the most cost effective system the initial investment would be recovered in less than three years.  The ratio of present worth of future savings over 10 years discounted at 11- 1/9%/annum to initial investment was found to be from about 2 to 14 for the most cost effective systems.]]></description>
      <pubDate>Wed, 15 Dec 1976 00:00:00 GMT</pubDate>
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