What is a solar radiation sensor?
What is a solar radiation sensor?
Solar radiation sensors are also known as pyranometers. A type of actinometer, these devices are used for measuring broadband solar irradiance as well as solar radiation flux density, which means that they measure the power of the light and heat from the sun. Pyranometers detect both direct and diffuse radiation.
What is the maximum solar radiation?
The maximum radiation intensity of the solar spectrum occurs at 500 nm, towards the blue end of the visible range. The complete spectrum comprises the ultraviolet (UV), visible (Vis) and infrared (IR) wavelengths. However, these wavelength ranges need to be sub-divided depending on the individual application fields.
Which instrument is used for solar radiation?
pyranometer
A pyranometer is used to measure global solar radiation falling on a horizontal surface.
How do you detect solar radiation?
There are two important types of instruments to measure solar radiation:
- Pyrheliometer is used to measure direct beam radiation at normal incidence. There are different types of pyrheliometers.
- Photoelectric sunshine recorder. The natural solar radiation is notoriously intermittent and varying in intensity.
How is solar radiation formed?
Solar radiation is radiant energy emitted by the sun from a nuclear fusion reaction that creates electromagnetic energy. The spectrum of solar radiation is close to that of a black body with a temperature of about 5800 K. About half of the radiation is in the visible short-wave part of the electromagnetic spectrum.
What is the frequency of solar radiation?
Photoabsorption of Solar Radiation The spectrum of solar radiation in the lower troposphere starts at ∼295nm and increases. Photons of shorter wavelength and higher energy are absorbed in the upper atmosphere and therefore do not reach the lower troposphere.
What technologies are used in Pyranometers?
What technologies are used in pyranometers? Explanation: Thermopile technology and silicon semiconductor technology are used in pyranometers.
Is solar radiation infrared?
Most of the solar radiation that reaches Earth is made up of visible and infrared light. Only a small amount of ultraviolet radiation reaches the surface.
How does a pyrheliometer measure solar radiation?
A pyrheliometer is an instrument for measurement of direct beam solar irradiance. Sunlight enters the instrument through a window and is directed onto a thermopile which converts heat to an electrical signal that can be recorded. The signal voltage is converted via a formula to measure watts per square metre.
