Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 54, Issue 13-14, Pages 2715-2723Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2011.03.022
Keywords
Polymer encapsulated paraffin nanoparticle; Jet impingement; Spray cooling
Categories
Funding
- National Science Foundation (NSF) [0828466]
- Air Force Research Laboratory (AFRL) through Universal Technology Corporation
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0828466] Funding Source: National Science Foundation
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Polymer encapsulated nano phase change materials (paraffin) in particulate form (nano PCM) are added in water to enhance the heat transfer performance of jet impingement and spray cooling. The nano PCM particles absorb heat when paraffin changes from solid to liquid phase. The encapsulation prevents paraffin leakage and agglomeration. The volume fraction of nanoparticles plays an important role on pressure drop and heat transfer. Slurry with 28% particle volume fraction enhances heat transfer coefficient by 50% and 70% when compared to base solution for jet impingement and spray cooling, respectively. The structural integrity of shell encapsulation has been demonstrated by repeated use in a closed loop. (C) 2011 Elsevier Ltd. All rights reserved.
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