Determination Analysis of Dish Collector Focal Shape in Vertical and Horizontal Direction of Concentrating Solar Power System
Dany Iman Santoso, Djatmiko Ichsani
Abstract
A CSP (Concentrating Solar Power) system must have a receiver to receive solar ray reflection from parabolic dish collector. Based on the receiver installation to the collector, there are two type installation such as parallel to collector (horizontal direction) and perpendicular to collector (vertical direction). In this research not only we compared the receiver orientation but also we varied geometry concentration ratio. The experiment results show that the focal shape diameter elongates 2 mm and surface temperature increases 5-10°C for vertical orientation with greater concentration ratio. However, there is no significant effect to receiver with horizontal orientation. Thermal efficiency was affected by radiation and convection heat loss but for geometry concentration ratio above 100, radiation and convection heat loss gived small impact.
J. O'Gallagher and R. Winston, Performance and Cost Benefits Associated with Nonimaging Secondary Concentrators Used in Point Focus Dish Solar Thermal Applications, prepared for the U.S. Department of Energy, Colorado, September 1987.
Paul R. Fraser, Stirling Dish System Performance Prediction Model, Mechanical Engineering Department thesis, University of Wisconsin, Madison, 2008.
Robert Pitz-Paal et al., High Temperature Solar Concentrators, in Solar Energy Conversion and Photoenergy Systems, In Encyclopedia of Life Supports (EOLSS). Developed under the Auspices of the UNESCO. Oxford, UK: Eolss publishers [http://www.eolss.net], 2007.
