Numerical simulation study on the heat transfer of a spiral tube receiver designed to a thermal power tower.
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Date
2013-05-17
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Abstract
in this work the heat transfer of a spiral tube receiver
exposed to concentrated solar radiation is studied theoretically.
The simulations were performed using Fluent6.3.26 for two
different sections at several Reynolds numbers: 100, 300, 500,
700, and 1000 to see the effect of the inlet velocity on the outlet
temperature. The effect of the inlet temperature is also discussed
by varying the inlet temperature of the water of 293K to 313K.
The results show that the average temperature of the heating and
adiabatic surface (inner wall) is decreasing when the velocity
inlet is increasing. The outlet temperature of a semicircular
section is higher than that of the circular section, but the Nusselt
number of this one is twice higher as that of semicircular section
and it’s due to the geometrical shape of the section.