• constructal entransy dissipation minimization of round tube heat exchanger cross-section

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 635
    • تعداد پرسش و پاسخ ها: 0
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     cross-section of round tube heat exchanger with porous materials is optimized by taking entransy dissipation rate minimization as optimization objective. the non-dimensional mean temperature differences of the cross-section with and without high conducting fins inserted are derived, respectively. by taking the radius ratio rin/rout between inner radius and outer radius as a design variable, the entransy dissipation rates are minimized. the heat transfer ability of the heat exchanger without high conducting fins inserted is improved as rin/rout increases, and the non-dimensional mean temperature difference decreases from 2/(3π) to 1/(3π). the heat transfer ability of the heat exchanger with high conducting fins inserted is much better than that without high conducting fins inserted, and the entransy dissipation rate varies a little when rin/rout apart from 1.

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