DESIGN, SIMULATION, AND OPTIMIZATION OF A SOLAR DISH COLLECTOR WITH SPIRAL-COIL THERMAL ABSORBER

被引:49
作者
Pavlovic, Sasa R. [1 ]
Bellos, Evangelos A. [2 ]
Stefanovic, Velimir P. [1 ]
Tzivanidis, Christos [2 ]
Stamenkovic, Zoran M. [3 ]
机构
[1] Univ Nis, Dept Energet & Proc Tech, Fac Mech Engn, Nish, Serbia
[2] Natl Tech Univ Athens, Thermal Energy Dept, Sch Mech Engn, Athens, Greece
[3] Univ Nis, Fac Mech Engn, Lab Intelligent Prod Syst, Dept Energet & Proc Tech, Nish, Serbia
来源
THERMAL SCIENCE | 2016年 / 20卷 / 04期
关键词
dish reflector; spiral-coil absorber; optical analysis; SolidWorks; thermal analysis; CONCENTRATOR; PERFORMANCE; RECEIVER;
D O I
10.2298/TSCI160213104P
中图分类号
O414.1 [热力学];
学科分类号
摘要
The efficient conversion of solar radiation into heat at high temperature levels requires the use of concentrating solar collectors. The goal of this paper is to present the optical and the thermal analysis of a parabolic dish concentrator with a spiral coil receiver. The parabolic dish reflector consists of eleven curvilinear trapezoidal reflective petals constructed by poly (methyl methacrylate) with silvered mirror layer and has a diameter of 3.8 m, while its focal distance is 2.26 m. This collector is designed with commercial software SolidWorks and simulated, optically and thermally in its Flow Simulation Studio. The optical analysis proved that the ideal position of the absorber is at 2.1 in from the reflector in order to maximize the optical efficiency and to create a relative uniform heat flux over the absorber. In thermal part of the analysis, the energetic efficiency was calculated approximately 65%, while the exergetic efficiency is varied from 4% to 15% according to the water inlet temperature. Moreover, other important parameters as the heat flux and temperature distribution over the absorber are presented. The pressure drop of the absorber coil is calculated at 0.07 bar, an acceptable value.
引用
收藏
页码:1387 / 1397
页数:11
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