Sunlight collecting device for photovoltaic system, has Fresnel lens for focusing sunlight on thin reflecting layer, where reflecting layer is created such that position of produced gas pin hole is changed, when focus of sunlight is changed

摘要

The device has a Fresnel lens (10) for focusing sunlight on a thin reflecting layer (11), where the focused sunlight produces a gas pin hole (12). A part of the sunlight enters into a cavity (13) through the gas pin hole, and the reflecting layer is created such that a position of the produced gas pin hole is changed, when the focus of the sunlight is changed. The cavity has a reflecting wall (14) and a solar element (15), and the reflecting layer is a reflecting fluid e.g. mercury, between two solid layers, where the reflecting layer has a thickness of 0.2 millimeters. An independent claim is also included for a method for collecting sunlight.