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Lee, Jaeseon
Innovative Thermal Engineering Lab (ITEL)
Research Interests
  • Energy conversion utilizing renewable/recyclable thermal sources
  • Thermal management of electronics and high heat-flux devices
  • Working fluids characterizing for thermo-fluid physics and systems

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Two-phase flow in high-heat-flux micro-channel heat sink for refrigeration cooling applications: Part II - heat transfer characteristics

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dc.contributor.author Lee, Jaeseon ko
dc.contributor.author Mudawar, Issam ko
dc.date.available 2016-12-02T09:29:21Z -
dc.date.created 2016-11-30 ko
dc.date.issued 2005-02 -
dc.identifier.citation INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v.48, no.5, pp.941 - 955 ko
dc.identifier.issn 0017-9310 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/20786 -
dc.identifier.uri http://www.sciencedirect.com/science/article/pii/S0017931004004211 ko
dc.description.abstract This paper is the second of a two-part study concerning two-phase flow and heat transfer characteristics of R134a in a micro-channel heat sink incorporated as an evaporator in a refrigeration cycle. Boiling heat transfer coefficients were measured by controlling heat flux (q" = 15.9 - 93.8 W/cm(2)) and vapor quality (x(e) = 0.26 - 0.87) over a broad range of mass velocity. While prior studies point to either nucleate boiling or annular film evaporation (convective flow boiling) as dominant heat transfer mechanisms in small channels, the present study shows heat transfer is associated with different mechanisms for low, medium and high qualities. Nucleate boiling occurs only at low qualities (x(e) < 0.05) corresponding to very low heat fluxes, and high fluxes produce medium quality (0.05 < x(e) < 0.55) or high quality (x(e) > 0.55) flows dominated by annular film evaporation. Because of the large differences in heat transfer mechanism between the three quality regions, better predictions are possible by dividing the quality range into smaller ranges corresponding to these flow transitions. A new heat transfer coefficient correlation is recommended which shows excellent predictions for both R134a and water. ko
dc.description.statementofresponsibility close -
dc.language ENG ko
dc.publisher PERGAMON-ELSEVIER SCIENCE LTD ko
dc.subject Micro-channels ko
dc.subject Flow boiling ko
dc.subject Refrigeration ko
dc.title Two-phase flow in high-heat-flux micro-channel heat sink for refrigeration cooling applications: Part II - heat transfer characteristics ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-13644254606 ko
dc.identifier.wosid 000227402100003 ko
dc.type.rims ART ko
dc.description.wostc 162 *
dc.date.tcdate 2016-12-26 *
dc.identifier.doi 10.1016/j.ijheatmasstransfer.2004.09.019 ko
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