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International Heat Transfer Conference 16

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

ALUMINUM FOAMS FOR WATER POOL BOILING ENHANCEMENT

Luca Doretti
Dept. of Civil, Architectural and Environmental Engineering, University of Padova, Via Venezia 1, 35131, Padova - IT

Hossein Sadafi
Queensland Geothermal Energy Centre of Excellence, School of Mechanical and Mining Engineering University of Queensland, Brisbane, Queensland, AU

Giulia Righetti
Dept. of Management and Engineering, University of Padova, Str.lla S. Nicola, 3, 36100, Vicenza - IT

Kamel Hooman
Queensland Geothermal Energy Centre of Excellence, School of Mechanical and Mining Engineering University of Queensland, Brisbane, Queensland, AU

Giovanni Antonio Longo
Dept. of Management and Engineering, University of Padova, Str.lla S. Nicola, 3, 36100, Vicenza - IT

Simone Mancin
Dept. of Management and Engineering, University of Padova, Str.lla S. Nicola, 3, 36100, Vicenza - IT

DOI: 10.1615/IHTC16.pma.022819
pages 8075-8082


KEY WORDS: Porous media, Boiling and evaporation, Aluminum Foams, Pool Boiling

Abstract

The study of pool boiling has been a topic of worldwide research over the past 100 years or so starting with the development of boiling curves in stagnant liquid layers. It is now well known that surface treatments can provide effective boiling heat transfer enhancement, and many variants of treated surfaces have been developed. This work presents an experimental analysis of water pool boiling heat transfer on aluminum foams. Three samples of 10 mm thick aluminum foam layers with 5, 10, and 40 PPI each with a mean porosity of 0.92 were brazed on identical aluminum plates and then tested during pool boiling in a dedicated setup. The measurement data were then compared against those collected during water pool boiling over a smooth horizontal reference aluminum plate. The metal foams showed better boiling heat transfer performance as compared to the smooth surface. Besides, for a more comprehensive understanding of the problem and visual analysis, the boiling process was recorded using a high-speed camera.

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