Integration of a Thermoelectric Subcooler into a Carbon Dioxide Transcritical Vapor Compression Cycle Refrigeration System

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dc.contributor.advisorRadermacher, Reinharden_US
dc.contributor.authorSchoenfeld, Jonathan Michaelen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2009-01-24T06:30:23Z
dc.date.available2009-01-24T06:30:23Z
dc.date.issued2008-08-04en_US
dc.description.abstractA thermoelectric (TE) subcooler was designed and fabricated to subcool CO2 exiting a gas cooler of a transcritical vapor compression cycle test system. The thermoelectric modules operated at efficiencies greater than the baseline system, increasing capacity and the overall coefficient of performance (COP) of the entire system. Subcooling of the CO2 before the expansion device led to a reduced optimum high side pressure, resulting in greater COP improvement that cannot be achieved in conventional refrigerant vapor compression systems utilizing a TE Subcooler. Improvements in COP of 10% were demonstrated with a corresponding capacity increase of 13%. A capacity increase of 24% was demonstrated at a comparable COP as the baseline system. Theoretical analysis of a combined Expander-TE Subcooler system, in which the electric power required by the TE Subcooler is provided by an expander-generator, was shown to provide a 30% increase in COP with a corresponding 24% increase in capacity.en_US
dc.format.extent3461893 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/8726
dc.language.isoen_US
dc.subject.pqcontrolledEngineering, Mechanicalen_US
dc.titleIntegration of a Thermoelectric Subcooler into a Carbon Dioxide Transcritical Vapor Compression Cycle Refrigeration Systemen_US
dc.typeThesisen_US

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