Construction of Test Facility to Measure and Visualize Refrigerant Maldistribution in Multiport Evaporator Headers

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dc.contributor.advisorRadermacher, Reinharden_US
dc.contributor.authorLinde, John Ericen_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.accessioned2006-02-04T06:31:35Z
dc.date.available2006-02-04T06:31:35Z
dc.date.issued2005-07-18en_US
dc.description.abstractIn a refrigeration cycle, condensed liquid refrigerant is expanded to a two-phase fluid entering the evaporator. In many applications, the evaporator paths are divided into a number of parallel sections to keep the pressure drop across the evaporator within a reasonable range and to maximize overall heat exchanger performance. Since the state of the refrigerant entering the evaporator is two-phase and its quality changes depending upon the operating conditions, the proper refrigerant distribution to individual sections is not an easy task. Nonuniform distribution, or maldistribution, will cause dry out at sections of lesser mass flow by superheating the refrigerant gas. This can result in nonuniform heat exchanger surface temperature distribution. Single-phase heat transfer coefficients (HTCs) are much lower than those of two-phase HTCs. When dryout occurs, both refrigerant-side HTCs and air-side HTCs are lower than those of wet surfaces. In addition to this, the temperature difference between the air anden_US
dc.format.extent5535002 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/3045
dc.language.isoen_US
dc.subject.pqcontrolledEngineering, Mechanicalen_US
dc.subject.pquncontrolledmicrochannelen_US
dc.subject.pquncontrolledheat exchangeren_US
dc.subject.pquncontrolledrefrigeranten_US
dc.subject.pquncontrolledmaldistributionen_US
dc.subject.pquncontrolledvisualizationen_US
dc.titleConstruction of Test Facility to Measure and Visualize Refrigerant Maldistribution in Multiport Evaporator Headersen_US
dc.typeThesisen_US

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