JP Journal of Heat and Mass Transfer
Volume 19, Issue 1, Pages 1 - 18
(February 2020) http://dx.doi.org/10.17654/HM019010001 |
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CORRELATION OF TEMPERATURE, VELOCITY AND PERFORATION LOCATION IN A FLAT UNGLAZED TRANSPIRED SOLAR COLLECTOR (UTC) DUE TO AIR FLOW
S. P. Panigrahi and S. K. Maharana
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Abstract: An unglazed transpired solar collector is a system that can leverage the abundant solar energy for various purposes. The solar collector is available in flat or corrugated form and is seen to be installed as an exterior layer of building facades. The cladding thus made absorbs radiation from the sun and heats up air being sucked by fan and flowing through perforations. In this paper, the focus has been to understand the correlation of plate temperature, exit temperature, the velocity distribution in the chamber and perforation location when air flows past a flat unglazed transpired solar collector (UTC). The establishment of correlations was carried out in the dataset of flow variables obtained after solving the problem using Navier-Stokes (NS) equations along with the standard k-e turbulence model and shear stress transport (SST) k-w model. An attempt has also been made to compute Pearson’s correlation coefficient of any two flow variables to understand their strong and weak correlations. A linear regression analysis has been done to predict the response variables against the response obtained in CFD solver by using an open source software Rstudio®. A strong correlation among cavity vertical velocity, perforation location and temperature has been established. From the study, it is noted that the location of a perforation has a strong correlation with the cavity vertical velocity and a weak correlation exists with temperature and plate temperature. |
Keywords and phrases: unglazed transpired solar collector (UTC), regression analysis, suction velocity, exit temperature, correlation, perforation.
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