How does a luminescent solar concentrator work?
Luminescent solar concentrators operate on the principle of collecting radiation over a large area, converting it by luminescence (specifically by fluorescence) and directing the generated radiation into a relatively small output target.
What are luminescent solar concentrator made of?
A luminescent solar concentrator consists of a glass or plastic plate containing or coated with luminophores (dyes or phosphors) that absorb sunlight and emit light at longer wavelengths.
What is solar concentrator?
A solar concentrator is a system for concentrating solar energy. In solar power plants, this thermal energy is used to generate steam that drives steam turbines. In this way, the radiation is converted into mechanical energy using a heat engine. Then, it drives a generator to get electrical energy.
What are the main factors that are to be considered while optically designing the solar concentrators?
Solar concentrators are classified into four categories based on their optical characteristics, such as the concentration ratio, focal shape, and optical standard.
What is diffuse solar radiation?
Diffuse sky radiation is solar radiation reaching the Earth’s surface after having been scattered from the direct solar beam by molecules or particulates in the atmosphere. Also called sky radiation, the determinative process for changing the colors of the sky.
Is luminescence a chemical or physical property?
Luminescence is spontaneous emission of light by a substance not resulting from heat; or “cold light”. It is thus a form of cold-body radiation. It can be caused by chemical reactions, electrical energy, subatomic motions or stress on a crystal.
What are the types of solar concentrators?
Types of solar concentrators
- Flat plate concentrators with plane reflectors and adjustable mirrors.
- Cylindrical parabolic collector.
- Solar ray collector with a circular concentrator.
How hot can solar concentrators get?
With a magnification of 1000 X and temperatures up to 800 Celsius, the heat generated by the sun’s energy, forces a piston to move which in turn spins a turbine that generates electricity.
What are the different types of solar concentrators?
What are the three types of solar radiation?
The three relevant bands, or ranges, along the solar radiation spectrum are ultraviolet, visible (PAR), and infrared. Of the light that reaches Earth’s surface, infrared radiation makes up 49.4% of while visible light provides 42.3% 9. Ultraviolet radiation makes up just over 8% of the total solar radiation.
What is a luminescent solar concentrator used for?
A luminescent solar concentrator ( LSC) is a device for concentrating radiation, solar radiation in particular, to produce electricity.
How is Light redirected in a luminescent concentrator?
Suitable optical designs trap light emitted by the luminescent material in all directions, redirecting it so that little escapes the photovoltaic converters. Redirection techniques include internal reflection, refractive index gradients and where suitable, diffraction.
What is the concentration factor of a solar concentrator?
The concentration factor is the ratio between the incoming and emitted irradiance. If the input irradiance is 1 kW/m2 and the output irradiance is 10 kW/m2, that would provide a concentration factor of 10.
How does a quantum dot solar concentrator work?
These devices were composed of phosphorescent metal halide nanocluster (or Quantum Dot) blends that exhibit massive Stokes shift (or downconversion) and which selectively absorb ultraviolet and emit near-infrared light, allowing for selective harvesting, improved reabsorption efficiency, and non-tinted transparency in the visible spectrum.