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International Heat Transfer Conference 12

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

Mechanical and thermal performance of polymer heat exchangers for solar hot water

Jane H. Davidson
Department of Mechanical Engineering, University of Minnesota, 111 Church Street S.E., Minneapolis, Minnesota 55455, USA

Susan C. Mantell
Department of Mechanical Engineering University of Minnesota 111 Church St., S.E. Minneapolis, MN 55455 USA

Francis A. Kulacki
Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455, USA

Wei Liu
Department of Mechanical Engineering University of Minnesota 111 Church St., S.E. Minneapolis, MN 55455 USA

Chunhui Wu
Department of Mechanical Engineering University of Minnesota 111 Church St., S.E. Minneapolis, MN 55455 USA

DOI: 10.1615/IHTC12.3080
6 pages

Abstrakt

On-going work to develop polymer heat exchangers for solar applications addresses material properties and natural convection heat transfer of immersed tube bundles. This paper presents creep data for polybutylene tubes in air at 99% relative humidity. Natural convection heat transfer of a tube bundle immersed in a solar collector is interpreted from experiments with a single horizontal tube. Temperature measurements permit characterization of natural convection in the enclosure. Data are correlated by NuD = 0.675RaD0.25 for 106 < RaD < 108.

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