Development of a solar concentrator with tracking system
Development of a solar concentrator with tracking system
复制标题
带跟踪系统的太阳能聚光器的开发
DOI：
10.5194/ms-7-233-2016
复制
发表时间：
2016
影响因子：
1.4
通讯作者：
J. Teixeira
中科院分区：
文献类型：
--
作者：
F. Barbosa;J. Afonso;F. Rodrigues;J. Teixeira
抽象的。自人类文明开始以来，太阳能一直是一种引起相当大兴趣的能源，用于开发太阳能的技术也在不断发展。由于社会一直面临的能源问题，开发提高太阳能系统效率的技术至关重要。太阳能集中是科学家多年来一直使用的技术，因为该系统能够将太阳能集中在焦点上，从而使能量强度显着增加。放置在集中器的焦点处的接收器可以使用存储的能量来通过例如斯特林发动机产生电能，或者通过加热可以在热循环中使用的流体来产生热能。太阳能集中器的效率可以通过添加双轴太阳能跟踪系统来提高，该系统允许存储能量的量的显著增加。针对上述问题，本文提出了一种低成本的带跟踪系统的太阳能碟形聚光器的设计和构造，该系统的光学和热模型，并通过实验测试进行了性能分析。实验验证允许得出结论，跟踪系统的应用程序的集中器是非常重要的，因为最小的延迟的太阳辐射导致系统效率的重要损失。另一方面，发现外部因素可以影响最终结果，包括收集器的光学和几何特性、接收器的吸收率和位置以及天气条件（主要是风速和云）。因此，本文旨在介绍这种技术在世界上的好处，其能源消耗的化石燃料是一个真实的问题，社会需要面对的。
Abstract. Solar Energy has been, since the beginning of human civilization, a source of energy that raised considerable interest, and the technology used for their exploitation has developed constantly. Due to the energetic problems which society has been facing, the development of technologies to increase the efficiency of solar systems is of paramount importance. The solar concentration is a technology that has been used for many years by the scientist, because this system enables the concentration of solar energy in a focus, which allows a significant increase in energy intensity. The receiver, placed at the focus of the concentrator, can use the stored energy to produce electrical energy through Stirling engine, for example, or to produce thermal energy by heating a fluid that can be used in a thermal cycle. The efficiency of solar concentrators can be improved with the addition of a dual axis solar tracker system which allows a significant increase in the amount of stored energy. In response to the aforementioned, this paper presents the design and construction of a solar dish concentrator with tracking system at low cost, the optical and thermal modelling of this system and a performance analysis through experimental tests. The experimental validation allows to conclude that the application of a tracking system to the concentrator is very important since a minimum delay of the solar radiation leads to important losses of system efficiency. On the other hand, it is found that the external factors can affect the final results which include the optical and geometrical properties of the collector, the absorptivity and the position of the receiver as well as the weather conditions (essentially the wind speed and clouds). Thus, the paper aims to present the benefits of this technology in a world whose the consumption of energy by fossil fuels is a real problem that society needs to face.