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Erschienen in:
2017 | OriginalPaper | Buchkapitel
The Effect of Depth-Dependent Velocity on the Performance of a Nanofluid-Based Direct Absorption Solar Collector
verfasst von : Gary J. O’Keeffe, Sarah L. Mitchell, Tim G. Myers, Vincent Cregan
Erschienen in: Progress in Industrial Mathematics at ECMI 2016
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Abstract
In this paper we present a two-dimensional model for the efficiency of an inclined nanofluid-based direct absorption solar collector. The model consists of a system of two differential equations; a radiative transport equation describing the propagation of solar radiation through the nanofluid and an energy equation. The Navier-Stokes equations are solved by applying no-slip boundary conditions to give a depth-dependent velocity profile. The heat source term is approximated via a power law approximation. The energy equation is solved numerically and the resulting solution is then used to calculate the efficiency. We investigate the effect of depth-dependent velocity and show how it affects the temperature, and thus the efficiency.