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Proceedings Paper

Structure and static analysis of a new umbrella-shaped keel concentrator
Author(s): Xiao-ju Yao; Bi Fu; Jian-feng Dai; Pei Zhao; Cheng-dan He
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Paper Abstract

In order to improve the concentration efficiency and eliminate the optical aberration, the umbrella-shaped keel structure has been introduced into the deployable structure concentrator, which can overcome the shortcomings such as the low concentration ratio and ineliminable superimposed folds. A deployable solar parabolic concentrator, possessing the collapsible umbrella-shaped keel and aperture radius of 4.9m has been designed. Its finite element model has been established, the ANSYS software has been adopted to perform the structure and static analysis. Under the influence of solar wind and films surface tension, the maximum deformation of the umbrella fabric is only 0.941mm, the radius of spot size is 6.37cm, geometry concentrator ratio could achieve 5908, only 1.3% reduced than the standard parabolic. The maximum stress is 1.6 MPa, which are much smaller than the tensile strength of Kevlar material. Power density of the concentrator is 8149227.24W/m2, the weight of the system is 0.38Kg per kW. The results indicated that the influence of films tension and solar wind on the working shape of concentrator bas been offset to a large extent by the umbrella-shaped keel. The new umbrella-shaped keel concentrator has available for the solar thermal thruster (STP) system, which has the advantage of high geometry concentrator ratio, structure stability, small envelope volume, light weight and deployable perfectly, as well as the selected structure and materials are appropriate.

Paper Details

Date Published: 12 April 2012
PDF: 9 pages
Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84092J (12 April 2012); doi: 10.1117/12.921997
Show Author Affiliations
Xiao-ju Yao, Lanzhou Univ. of Technology (China)
Bi Fu, Lanzhou Univ. of Technology (China)
Jian-feng Dai, Lanzhou Univ. of Technology (China)
Pei Zhao, Northwestern Polytechnical Univ. (China)
Cheng-dan He, Lanzhou Institute of Physics (China)

Published in SPIE Proceedings Vol. 8409:
Third International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Yoseph Bar-Cohen; In Lee; Jian Lu, Editor(s)

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