Journal
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume 33, Issue 7, Pages 1402-1412Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2010.05.010
Keywords
Cooling; Compressor; Electronic; Design; Evaporator; Microchannel; Experiment; Isobutane
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Funding
- CNPq
- FINEP
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We investigate a novel evaporator design for a small-scale refrigeration system whose function is to assist the existing heat pipe technology currently used in chip cooling of portable computers. A heat transfer model for the evaporator/heat pipe assembly was devised specifically for sizing the evaporator in order to keep the chip surface temperature below a certain value. A prototype was tested with R-600a at saturation temperatures of 45 and 55 degrees C, mass flow rates between 0.5 and 1.5 kg h(-1) and heat transfer rates between 30 and 60 W. The experimental results demonstrated that the average refrigerant-side heat transfer coefficient is more sensitive to a change in the refrigerant mass flux than to changes in the saturation temperature and heat transfer rate. The agreement between the calculated heat transfer coefficient and the data was within +/- 10% for the conditions evaluated. (c) 2010 Elsevier Ltd and IIR. All rights reserved.
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