Abstract
In the present work we have studied the case of a conventional solar air collector and try to see how is it possible to improve it-s efficiency, by changing Reynolds number. Given the complexity of the problem we used the FLUENT calculation code. We made the mathematical model, then we gave a validation of our result by the results of Dimartini, we gave fields of speed, turbulence and a Nusselt profile and factor of friction as a function of the Reynolds Number. The results show that variation of Reynolds number has an influence on the performance of the solar collector, which is why we have used several values in order to observe the most suitable one.
Highlights
In the present work we have studied the case of a conventional solar air collector and try to see how is it possible to improve it-s efficiency, by changing Reynolds number
JALIL and AYAAL [1], studied the case with a simple solar collector, by varying the quantity of air admitted by the multiplication of the inputs from 1 to 3, they obtained that the case with 3 inputs was the most suitable in order to obtain the highest value of the outlet temperature, for an inlet speed of 1.5 m / s and a flow of 900 W the outlet temperature could expect 50 ° C with three inputs
Rodono and Volpes [2] have studied the behaviour of a flat solar collector during a period of 24 hours and have brought correlations making a relation between The radiant heat captured by a solar collector divided by three fraction, that transmitted by conduction, the other collected by the flow and the last reflected by the glazing
Summary
JALIL and AYAAL [1], studied the case with a simple solar collector, by varying the quantity of air admitted by the multiplication of the inputs from 1 to 3, they obtained that the case with 3 inputs was the most suitable in order to obtain the highest value of the outlet temperature, for an inlet speed of 1.5 m / s and a flow of 900 W the outlet temperature could expect 50 ° C with three inputs. Rodono and Volpes [2] have studied the behaviour of a flat solar collector during a period of 24 hours and have brought correlations making a relation between The radiant heat captured by a solar collector divided by three fraction, that transmitted by conduction , the other collected by the flow and the last reflected by the glazing. The purpose of these equations is to estimate the efficiency of the sensor. In this study we are going to study the case of a solar collector provided with two obstacles in the form inclined at 45 ° by varying the speed of air entry and the Reynolds number and try to see the influence of this variation on sensor performance
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