Design and calibration of an electrodynamic driver for the Space Thermoacoustic Refrigerator (STAR)
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Authors
Harris, David Anthony.
Volkert, Richard Eugene
Subjects
electrodynamic loudspeaker
thermoacoustic refrigerator
thermoacoustic refrigerator
Advisors
Hofler, Thomas J.
Garrett, Steven L.
Date of Issue
1989-06
Date
June 1989
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The objective of the STAR project is to test and space
qualify a continuous cycle cryogenic refrigeration system for
the cooling of sensors and electronics based upon the
thermoacoustic heat pumping effect. This thesis describes the
design, assembly, and calibration of the electrodynamic driver
and its associated performance monitoring and control
instrumentation. The electroacoustic efficiency of the driver
is measured under different operating conditions utilizing a
prototype refrigerator resonator. These results are then
compared to modelled efficiencies derived from a computer
simulation program that uses the independently-measured
individual component parameters to predict the driver
performance. Good agreement between measured and predicted
efficiencies is observed. Highest electroacoustic
efficiencies are shown to occur when the resonance frequencies
of the driver and resonator are most closely matched. A
maximum electroacoustic efficiency of 50% is achieved under
these conditions. More important however, is that the
efficiency decreases by only 10% over a 30% bandwidth about
resonance.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
206 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
Copyright is reserved by the copyright owner
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.
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.