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ONE AXIS LOW COST TRACKING FOR FRAMELESS THIN FILM PHOTO VOLTAIC (PV) MODULES

IP.com Disclosure Number: IPCOM000236221D
Publication Date: 2014-Apr-12
Document File: 7 page(s) / 335K

Publishing Venue

The IP.com Prior Art Database

Abstract

The proposed invention provides a technique to track modules via a new one axis tracking system. With no major modification on the racking system, the price of the system is almost shaved on one side. The technique only tracks the cross beams of a racking system by using linear actuators integrated in the racking systems. The anterior beams are going to be fixed by using a simple rotary pint suitable for thin modules or any other types of modules. Hinges for example could be low-cost solution for that.

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ONE AXIS LOW COST TRACKING FOR FRAMELESS THIN FILM PHOTO VOLTAIC (PV) MODULES

BRIEF ABSTRACT

The proposed invention provides a technique to track modules via a new one axis tracking system. With no major modification on the racking system, the price of the system is almost shaved on one side.  The technique only tracks the cross beams of a racking system by using linear actuators integrated in the racking systems. The anterior beams are going to be fixed by using a simple rotary pint suitable for thin modules or any other types of modules. Hinges for example could be low-cost solution for that.

KEYWORDS

            One axis, tracking, racking system, price, cross beams, linear actuators, anterior beams, rotary pint, thin modules, hinges, photo voltaic (PV), sunlight, payload.

DETAILED DESCRIPTION

In general, the solar market has become highly competitive and photovoltaic (PV) applications commoditized. Photovoltaic trackers are used to optimize the angle of incidence between the incoming sunlight and the payload the PV modules.

Figure 1 depicts dual axis tracker. Dual axis trackers have two degrees of freedom which acts as axes of rotation. These axes are normal to one another. The axis which is fixed with respect to the ground is considered a primary axis. The axis which is referenced to the primary axis is considered a secondary axis.

The competiveness for solar tracking systems has become more challenging become more challenging because of strong decreased prices for solar systems over the last years. By taking the price pressure into account is to expect that the utility operators may install more and more systems technology per area. Conventionally, the costly solar tracker has become less important from a cost perspective. In parallel, dual and one axis tracking system improves the energy yield of a solar module. This results in making the system complex and an advantage of a solar module which comes out without any rotating parts gets lost.

Therefore, there is a need to provide a technique to track modules with low cost.

The proposed invention provides a technique to track modules via a new one axis tracking system. The technique only tracks the cross beams of a racking system by using linear actuators integrated in the racking systems.  The anterior beams are going to be fixed by using a simple rotary pint suitable for thin modules or any other types of modules. Hinges for example could be low-cost solution for that. The stroke of the actuator could get tracked by a calendar tracking microcontroller based algorithm.

Figure 2 depicts individual parts of the construction.

Figure 3 depicts single axis tracker with roughly 20 degrees tilt. Single axis trackers have one degree of freedom which acts as an axis of rotation. The axis of rotation of single axis trackers is aligned along a true north meridian. It is possible to align them in any cardinal direction with advanced tracking algorithms.

Figure 4 depicts installation of ...