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Pool Boiling of Water–Al2O3 and Water–Cu Nanofluids Outside Porous Coated Tubes

Abstract

This paper deals with pool boiling ofwater–Al2O3 and water–Cu nanofluids on porous coated, horizontal tubes. Commercially available stainless-steel tubes having 10 mm outside diameter and 0.6 mm wall thickness were used to fabricate a test heater. Aluminum porous coatings 0.15 mm thick with porosity of about 40% were produced by plasma spraying. A smooth tube served as a reference tube. The experiments were conducted under different absolute operating pressures of 200 kPa, 100 kPa, and 10 kPa. Nanoparticles were tested at concentrations of 0.01%, 0.1%, and 1% by weight. In all cases tested, enhancement heat transfer was always observed during boiling of water–Al2O3 and water–Cu nanofluids on smooth tubes compared to boiling of distilled water. Contrary to smooth tubes, addition of even a small amount of nanoparticles resulted in deterioration of heat transfer during pool boiling of water–Al2O3 and water–Cu nanofluids on porous coated tubes in comparison with boiling of distilled water.

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Keywords

Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
HEAT TRANSFER ENGINEERING no. 36, pages 553 - 563,
ISSN: 0145-7632
Language:
English
Publication year:
2015
Bibliographic description:
Cieśliński J., Kaczmarczyk T.: Pool Boiling of Water–Al2O3 and Water–Cu Nanofluids Outside Porous Coated Tubes// HEAT TRANSFER ENGINEERING. -Vol. 36, nr. 6 (2015), s.553-563
DOI:
Digital Object Identifier (open in new tab) 10.1080/01457632.2014.939046
Verified by:
Gdańsk University of Technology

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