What Is Solar Radiation

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What Is Solar Radiation?

Solar radiation is defined as the 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. The other half is mostly in the near-infrared part, with some in the ultraviolet part of the spectrum. To know more about What Is Solar Radiation you can visit Wikipedia, here is the link for your futhere reading Wikipedia Solar Energy. You can also request us for an obligation for consultation here Request Consultation. The units of measure are Watts per square meter. The device is typically used in agricultural applications, and is used in the calculation of Evapotransportation. Evapotransportation is the potential for evaporation of moisture from the soil (or the reverse of rainfall) and is a function solar energy, wind and temperature.

What Is Your Local Solar Radiation?

Solar radiation is variable based on locality and it is not same across all the cities in Asutralia. So, it is important for you to consulat with a solar energy professional to know the exact solar radiation in your locality. We, Solar World is always here to help you with your all kind of solar energy related consultation. Please feel free to request obligation free solar system assestment and solar price quote from Solar World, just call us at 1300 131 989 and our friendly customer care executive will guide you to get connected with our solar energy professional in your locality and remember its obligation free consultation. To request obligation free consultation please click here Request Consultation. The Figure here shows daily peak sunlight hours in Australian cities and it is important to know daily peak sunlight hours in your locality to determine your expected system output. This this will also help you figureout how log it will take for you to get back your solar system investment or to calculate your return on investment on solar system. We always recommend to research on all the facts and figures related to solar system and that's why we offer obligation free professional solar system consultation. Feel free to call us at 1300 131 989 Or, you can request for an obligation free consulation through our website. Just clink here Request Consultation and one of our friendly solar energy consultant will get in touch with to help you with all the information that you need before going for solar system.

Why Solar Radiation Is Important?

The efficiency of a PV Solar module depends on both the power contained in the sunlight and on the angel between the PV Solar Module and the Sun. When the PV Solar module is perpendicular to the sunlight then the power density will be maximum. The power density of a fixed pv solar module is always less than the sunlight as the sun is shifting consistently and the surface is fixed.

How To Calculate Solar Radiation?

The figure below shows how to calculate the radiation incident on a tilted surface (S_module) given either the solar radiation measured on horizontal surface (S_horiz) or the solar radiation measured perpendicular to the sun (S_incident).     The equations of S_module, S_horiz and S_incident are:

Where The elevation angle is α β is the tilt angle of the module measured from the horizontal. The elevation angle has been previously given as:

where φ is the latitude; and δ is the declination angle previously given as:

where d is the day of the year. Note that from simple math (284+d) is equivalent to (d-81) which was used before. Two equations are used interchangeably in literature. From these equations a relationship between S_module and S_horiz can be determined as:

The tilt angle got a major impact on solar radiation incident on a PV Module surface. For a fixed tilt angle, the maximum power over the course of a year is obtained when the tilt angle is equal to the latitude of the location. However, steeper tilt angles are optimized for large winter loads, while lower title angles use a greater fraction of light in the summer. The simulation below calculates the maximum number of solar isolation as a function of latitude and module angle.

As we see from the figure, for a module tilt of 0°, the Module Power and Power on Horizontal are equal since the module is lying flat on the ground. At a module tilt of 80°, the module is almost vertical. The Module Power is less than the Incident Power except when the module is perpendicular to the sun’s rays and the values are equal. The module is orientated to the equator so it faces north in the Southern Hemisphere and south in the Northern Hemisphere. As module moves from the Northern to Southern Hemisphere (latitude = 0°), the module is turned to face in the opposite direction and so the Module Power curve flips. When the light is incident from the rear of the module the Module Power drops to zero . Try setting the latitude to your location and then varying the module tilt to see the effect on the amount of power received throughout the year. Information is collected from Photovoltaic Education Network

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