Optimization of Naval propulsion machinery
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Authors
Hayman, Douglass F.
Otto, Harold H.
Subjects
Advisors
Powell, S.C
Date of Issue
1962-05
Date
May 1962
Publisher
Massachusetts Institute of Technology
Language
en_US
Abstract
The optimum naval propulsion plant is considered to
be the one with the least total weight of machinery plus
fuel. Perturbations of a modern destroyer propulsion
cycle, with standard equipment components, are considered.
Boiler pressure, condenser pressure , low pressure turbine
exhaust annulus area, condenser surface, and leaving loss
are considered variable. Equations are derived which express
the variations in weight of important components.
Availability balance methods are .applied in order to relate
component efficiencies to fuel weight. Theoretical and
numerical proof is given that leaving loss can be optimized
on the basis of minimum turbine and condenser weight, independent
of the rest of the cycle. This reduces the computations
necessary in "brute force" analysis by an order of
magnitude . As an example of the method, an availability
balance is made for DLG-6 at cruising condition. Using
1050 F steam, boiler pressures from 800 psia to 1600 psia,
and a broad range of condenser-L.P. turbine combinations,
best parameters are found for ranges of 3*000, 5 $000,
7^000, and 10,000 miles „ Optimum condenser pressure is
found to be fairly constant at 1.35" Hg. Abs., for the
cruising condition and 75 F cooling water. The example
studied indicates that standardization of naval propulsion
plants at 1200 psia is on the high side of the optimum.
Type
Thesis
Description
This thesis document was issued under the authority of another institution, not NPS. At the time it was written, a copy was added to the NPS Library Collection for reasons not now known. It has been included in the digital archive for its historical value to NPS. Not believed to be a CIVINS (Civilian Institutions) title.
Series/Report No
Department
Naval Architecture and Marine Engineering
Organization
Massachusetts Institute of Technology
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Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.