Design and calibration of an electrodynamic driver for the Space Thermoacoustic Refrigerator (STAR)
Harris, David Anthony.
Volkert, Richard Eugene
Hofler, Thomas J.
Garrett, Steven L.
MetadataShow full item record
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.
RightsCopyright 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.
Showing items related by title, author, creator and subject.
Fasanello, Thomas J. (1992);X-ray fluorescence from thin foils inserted into the NPS linac have been used to measure the the integrated electron beam current only. The measured x-ray flux and the known inner shell ionization cross sections are used ...
Maruyama, X.K.; Fasanello, T.; Rietdyk, H.; Piestrup, M.A.; Rule, D.W.; Fiorito, R.B. (1993);X-ray fluorescence from thin foils inserted into the Naval Postgraduate School linac has been used to measure the integrated electron beam intensity when the accelerator is operating with dark current. The measured ...
Fitzpatrick, Michele (Monterey, California. Naval Postgraduate School, 1988-03);The objective of the STAR project is to test and space qualify a new continuous cycle cryogenic refrigeration system for cooling of sensors and electronics which is based upon the newly discovered thermoacoustic heat pumping ...