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The Performance Simulation of All-Glass Vacuum Tubes with Coaxial Fluid Conduit  

Lee, Sang-Jin (Hanyang University)
Hyun, Myung-Taek (Cheju National University)
Park, Youn-Cheol (Cheju National University)
Chun, Won-Gee (Cheju National University)
Lee, Jung-Ho (KOPAC ETS, Inc.)
Publication Information
Journal of the Korean Solar Energy Society / v.24, no.3, 2004 , pp. 27-38 More about this Journal
Abstract
A numerical investigation has been carried out for a solar system, which consists of all glass solar vacuum tubes Water is heated as it flows through the coaxial fluid conduit inserted in each tube. The space between the exterior of the fluid conduit and the glass tube is filled with antifreeze solution. This is to facilitate heat transfer from the solar heated absorber surface to water and to prevent the functional problems due to freezing in frigid weather conditions. A one-dimensional steady state model is fully described which will be used to develop three-dimensional model using STAR-CD. These models could be used efficiently in designing all-glass solar collector tubes with different geometrical parameters other than those considered in the present analysis. Results show good agreement when compared with other experimental data demonstrating the reliability of the present model.
Keywords
Solar energy; All-glass vacuum tube; Coaxial fluid conduit; Simulation;
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  • Reference
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