parametric analysis of a solar still with inverted v-shaped glass condenser
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ID: 155974
2015
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Abstract
A parametric analysis of a solar still with an inverted V-shaped glass
condenser is presented. Results are based on a new mathematical model
obtained from a lumped-parameter analysis of the still, with an approach that
makes each glass plate of the condensing system sensitive to orientation and
depicts its thermal differences. Numerical computations are made to evaluate
productivity and temperature differences between the condensing plates as a
function of condenser orientation, extinction coefficient and thickness. From
this study it was found a significant influence of incident solar radiation
on the thermal performance of each condensing plate. Large extinction
coefficients and thick glass plates increase absorption losses that result in
an appreciable temperature difference. An extinction coefficient of 40 m-1
produces a temperature difference of 2.5°C between both condensers. A glass
thickness of 10 mm may increase this temperature difference up to 3.5°C. With
respect to the production, due to the still orientation, a difference of 8.7%
was found for the condensing plates facing an east-west direction. The
proposed model is able to reproduce the temperature and distillate production
differences that arise between both condensers in good agreement with
experimental data. The overall performance of the still, studied with this
new approach, was also in accordance with the widely used traditional models
for solar distillation. In addition, the condensing plates parameters of the
still can be used to force a differential heating such that for the whole day
the temperature of one condensing plate is always higher.
| Reference Key |
eduardo2015thermalparametric
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|---|---|
| Authors | ;Rubio Eduardo;Fernández José L. |
| Journal | Nature |
| Year | 2015 |
| DOI |
10.2298/TSCI121029067R
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| URL | |
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