دانلود مقاله ISI انگلیسی شماره 158713
کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
158713 2018 15 صفحه PDF سفارش دهید 9160 کلمه
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عنوان انگلیسی
Geometric evaluation of the main operational principle of an overtopping wave energy converter by means of Constructal Design
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : Renewable Energy, Volume 118, April 2018, Pages 727-741

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چکیده انگلیسی

Current work aims to study the geometry of an overtopping wave energy converter in real scale using Constructal Design. Problem studied here is submitted to two constraints (areas of wave tank and overtopping ramp) and two degrees of freedom: ratio between the height and length of ramp (H1/L1) (or ramp slope, β) and distance between the bottom of wave tank and the device (S). The effect of H1/L1 and S over dimensionless device available power (Pd) is evaluated for three different ramp area fractions (ϕ) and two different monochromatic waves. Conservation equations of mass, momentum and one equation for the transport of water volume fraction are solved with the finite volume method. To tackle with water-air mixture, multiphase model Volume of Fluid is used. Results showed the applicability of Constructal Design for improvement of device performance. For fixed magnitudes of S, the highest magnitudes of Pd are achieved for the lowest possible ratio of H1/L1. For smaller construction areas of the ramp, intermediate magnitudes of S led to the highest magnitudes of Pd, i.e., the sinking of device does not led necessarily to the best performance. Moreover, optimal shapes are not universal (the same) for the two wave conditions studied.

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