Effect of shroud and baffle on heat transfer in a solar thermal storage tank

S. K S Boetcher, F. A. Kulacki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Enhancing heat transfer during the charge and discharge of solar thermal storage tanks is an ongoing technical challenge. The types of thermal storage systems considered in the present study comprise an immersed heat exchanger at the top of a solar thermal storage fluid. The discharge process of a thermal store with specified dimensions is numerically simulated over a range of Rayleigh numbers, 105 < RaD <107. The immersed heat exchanger is modeled as a two-dimensional isothermal cylinder which is situated near the top of a water-filled tank with adiabatic walls. An adiabatic shroud whose shape is parametrically varied is placed around the cylinder. In addition, the shroud is connected to an adiabatic baffle situated beneath the cylinder. Nusselt numbers are calculated for different shroud shapes at different Rayleigh numbers. Results show that the shroud is effective in increasing the heat transfer rate. Optimal shroud and baffle geometries are presented as well as qualitative flow results.

Original languageEnglish (US)
Title of host publicationProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Pages701-710
Number of pages10
DOIs
StatePublished - Dec 1 2009
Event2009 ASME Summer Heat Transfer Conference, HT2009 - San Francisco, CA, United States
Duration: Jul 19 2009Jul 23 2009

Publication series

NameProceedings of the ASME Summer Heat Transfer Conference 2009, HT2009
Volume1

Other

Other2009 ASME Summer Heat Transfer Conference, HT2009
CountryUnited States
CitySan Francisco, CA
Period7/19/097/23/09

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    Boetcher, S. K. S., & Kulacki, F. A. (2009). Effect of shroud and baffle on heat transfer in a solar thermal storage tank. In Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009 (pp. 701-710). (Proceedings of the ASME Summer Heat Transfer Conference 2009, HT2009; Vol. 1). https://doi.org/10.1115/HT2009-88413