A Kind Of Based On The Research Of Sunflowers Bionic Solar Tracking System

It has been a long history of the utilization of solar energy. However, with the energy shortage becoming more and more serious, it requires further research to improve the utilization efficiency of solar energy. Solar tracking is one of the important ways to improve the effeciency. So far, there has been developed a variety of implementations to achieve solar tracking.On the basis of existing solar tracking technology, a new tracking thought is proposed, which is called B ionic Solar Tracking (BST). BST is based on the mechanism of sunflower towards the sun. It implements the solar tracking with some parallel shafts. Based on this, the following works have been carried out:Firstly, the application of solar tracking in the solar photovoltaic (PV) power generation system and three main kinds of solar thermal power generation system have been analyzed, which shows that the tracking technique is very important. By the way, the existing traditional tracking methods have been introduced.Secondly, based on the mechanism of sunflower towards the sun, an appropriate structure of tracking system have been designed. The theoretical and experimental research on the structure, function and devices about each part of the system has been carried out, by which the basic structure model of the system has been got.Thirdly, according to the basic structure model of the system, the corresponding theoretical simulation and calculation model has been established. Then the study on the system’s response characteristics has been carried out, which includes the pointing accuracy, the time-consuming with different support radius, different motor speed, different time step and different incident angle of sun. The main study contains two kinds of tracking system:one with three parallel telescopic sharfts and the other one with two parallel telescopic sharfts.Fourthly, according to the basic structure model and theoretical simulation and calculation of the system, three experimental tracking systems have been developed, which contains two with three parallel telescopic sharfts and one with two parallel telescopic sharfts. The two systems with three parallel telescopic sharfts involve one with photoresistors as the sensing element and one with photocells as the sensing element. The system with two parallel telescopic sharfts has been made with photocells as the sensing element. The tracking performance of those three systems has been verified. In addition, the collection efficiency of the solar radiation energy about the system with three parallel telescopic sharfts and photocells as the sensing element has been tested, after which been added a collector loop device.Finally, in order to know the performance of the tracking system with three parallel telescopic sharfts and the tracking system with two parallel telescopic sharfts been made, the corresponding testing system has been made, and the test about the parameters has been finished, which includes pointing accuracy and wobble frequency...