Is there a limitation of power recieve per square metre of colar cell? If there is,how many kWh?
More Pages:
- Solar Panel: How Many Suns Can Be Focused On A Solar Cell? What Is Limitation. What Causes This Limitation? (12/13/2011)
- Solar Panel: What Is The Maximum Power A Solar Cell Can Provide? (6/23/2011)
- Why solar cell can’t produce current when they receive fluorescent light?
- Solar Panel: If A Commercial Solar Cell Array Can Convert Sunlight To An Average Power? (11/25/2011)
- Solar Turbines: How Many Square Meters Of Land Must Sunlight Be Collected In Order To Provide This Amount Of Power? (1/7/2012)
{ 3 comments… read them below or add one }
The limit is teh amount of solar energy falling on the earth. This is roughly 1.3kW/m^2. This will vary across time of day, the irradiance being the highest at local solar noon.
The solar cells should be as blackk as possible at all wavelengths in order to achieve maximum coupling of the sunlight into cells. They also should have a quantum efficiency as clase to one as possible at all wavelengths (quantum efficiency is the number of electrons produced for each photon incident on the cell – it is always less than 1).
If you use a parabolic mirror, you can get more energy per square metre than the 1.3kW max that normally falls on the Earth’s surface. If you do that, the limit will be how hot your solar panel gets, and that will depend on your ambient temperature, whether there is a wind blowing and some design details of the panel, like whtehr or not it has a heat sink.
There are two limits that I know of. The sun only puts out so much energy per square meter. So if you depend on the sun shining on the solar collector directly, there the limit called the solar constant (see ref 1). It is measured by satellite to be roughly 1366 watts per square meter. It reduces when received through the atmosphere.
If you use mirrors to shine on the solar panel, you can now have an enormous amount of sunlight (in theory anyway) on the solar panel. Now you need to worry about things like current level, resistance, and dissipating the heat that will accompany that amount of sunlight. But you can significantly increase the amount of power that comes from a solar panel by increasing the light collection area. The amount you can do this depends on how the panel was designed.