Proposed Sun Tracking System

Proposed Sun Tracking bodyAbstractIntroductionThe basic design of a solar thermal power generation system is as shown in the figure. In much(prenominal) a system, the major components argon the solar energy concentrator, sterling locomotive and the dynamo (alternator) unit.A parabolic dish reflector acts as the concentrator in this system.To deliver the goods a good carry outance from a solar thermal diversity engine, it should be exactly mounted on a place where supreme heat transfer is possible.It is the center or the focal point of the parabolic reflector surface.Then only the engine receives the maximum amount of solar thermal energy, which will be converted into kinetic energy and and then to electricity.There are two possible configurations for the placement of the sterling engine depend on the surface type of the reflector.They are known as prime focus configuration and the set off focus configuration.Because of the position of the solarize changes according to the rotation of earth, the parabolic surface has to be focused to the delegation of the sun at all the cartridge clips.The proposed solar tracking system consists of solidware and software to achieve following capabilitiesLocalizationThe position of the Sun in a given time can be calculated victimization mathematical equations ground on the time, location, altitude and few other factors. To perform such a calculation, the exact location of the gismo should be known. Since this device is not mounted on a mobile configuration, it is not hard to find the exact location with help of a map or a GPS device after install in the field. solely it is much(prenominal) convenient to use an embedded GPS receiver with this system. This will eliminate the exigency of initial setup and it also capable of providing the nice UT timestamp based on the synchronized satellite clocks. It makes this device a location breakaway and time independent senior last precision solar tracking apparatus. NREL solar position algorithmic rule (SPA)Several methods and algorithms to calculate the position of the sun has been promulgated in the literature of the solar research, but most of them were not precise enough because their uncertainties have been greater than 0.01. Reda and Andreas implemented a new algorithm which is capable of estimate the position of the sun with uncertainties of 0.0003 and well known as solar position algorithm (SPA) by National Renewable expertness Laboratory (NREL).Feedback loop mechanism MPU 9250 IMUIn this solar tracking system, druthers of the reflector surface is precisely throwled and maintained by a unopen loop suss out system. Therefore this system should consist of a feedback mechanism to obtain the current orientation of the reflector as the feedback input of the control loop. There are several methods to fulfil this requirement. For example, a read run based method such as a rotary encoder with a known reference point can be used per dis tributively axis. But since it increases the mechanical complexity of the system there is a actually higher chance of causing mechanical failures and detector issues. To eliminate this bothers time keeping the accuracy in a higher direct, a little electro mechanical systems (MEMS) based implementation is suggested. Among the advantages of this kind of devices less power usage, high accuracy, fast response, less complexity and the minimal space requirement are mostly highlighted in this application.Inertia Measuring Units (IMU) are genuinely best-selling(predicate) in the fields of mobile devices, game controllers, drone flight control systems and self-balancing toys because they provide the angular position coordinates (Yaw Pitch and Roll) in a actually higher sample rates. They are also accurate enough to symmetricalness and guide a wireless controlled drone in a truly high level of accuracy even in the industrial electro magnetic noise and interference. This devices ar e normally consist of a gyroscope, and accelerometer and a magnetic compass. To ensure the maximum accuracy in all styles, it is recommended to use 3 axis devices. Theoretically we can say that with the only help of a gyroscope, it is possible to calculate the angular orientation in Euler coordinates, but the problem of using a single device is it may generate very much of error when continuously using in long time periods. It is commonly known as the gyroscope drift. This can be remunerated by using a secondary device which corrects the drift and it is the accelerometer. This have sensor based approach is commonly described as sensor fusion. There are several sensor fusion algorithms available in the industry such as Karlmann try and the complementary filter. In this research, Karlmann filter based algorithm has been used.With the both accelerometer and the gyroscope sensors, now we can accurately calculate the Euler angles of the reflector when the IMU is placed near the focus point of the Parabola. The offset values can be preconfigured to match the exact difference mingled with the sensor position and the focal point. But we need one more reference point to convert this coordinates into altitude and azimuth vectors. It is the north direction and can use a magnetic compass to obtain this parameter. But it also need a very much higher level of calibrations due to the magnetic field variations depend on the situations and the locations. In this research, the nightspot axis MPU 9250 has used. It is an integrated chip with 3 axis MEMS gyroscope, 3 axis MEMS accelerometer and a 3 axis magnetic compass. It has a 16bit RAW info outputs on each axis and therefore a very high accuracy is obtained.