WASTE HEAT RECOVERY CARBON DIOXIDE HEAT EXCHANGER FOR GAS TURBINE ENGINES

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Authors
Polsinelli, Samuele J.
Subjects
heat exchanger
CFD
CFX
T-63 installation
helical coil heat exchanger
waste heat recovery
carbon dioxide CO2
cogeneration
gas turbine engine instrumentation
Advisors
Hobson, Garth V.
Seivwright, Douglas L.
Date of Issue
2018-06
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
The U.S. Navy is looking to conserve energy on shore and at sea. As a contribution to the ongoing effort to make turbine engines more efficient, this research presents the design and analysis of a helical coil waste heat recovery heat exchanger for a Rolls Royce T63-A-720 gas turbine engine. The T-63 engine was installed in the test cell and modified, with the appropriate instrumentation added. The waste heat recovery heat exchanger was designed for a future closed Brayton cycle loop. Analysis was conducted on the heat exchanger's effect on the engine backpressure, which was shown to be negligible. Further analysis showed the heat exchanger was capable of meeting the requirements laid out by NPS student Aaron VanDenBerg in his 2016 thesis, “Energy Efficient Waste Heat Recovery from an Engine Exhaust System.” Finally, a study varying the pressure drop through the heat exchanger was conducted and a projected performance curve of the heat exchanger was developed. An analytical equation was derived determining the mass flow for a required exit temperature. Our research findings indicate promise for waste heat recovery using a helical coil heat exchanger. We recommend building and testing the heat exchanger to verify the model.
Type
Thesis
Description
Series/Report No
Department
Mechanical and Aerospace Engineering (MAE)
Organization
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NPS Report Number
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Distribution Statement
Approved for public release; distribution is unlimited.
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.
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