4 ms·
I'm not sure where you are getting the 250-300W/m2 of irradiance. The standard value used in all solar industry calulations is 1000W/m2, but in practice, you sh
by esm5 9y ago
I'm not sure where you are getting the 250-300W/m2 of irradiance. The standard value used in all solar industry calulations is 1000W/m2, but in practice, you should expect to see 800W/m2 at sea level and moderate lattitude.
- ScottBurson 9y agoMaybe that's the 24-hour average?
- chris_va 9y agoAverage capacity factor for solar cell is about 25% (night, clouds, seasons, etc). 1000W/m2 * 0.25 => ~250W/m2.
- rpenm 9y ago1000W/m^2 is average daily peak irradiance. That number is useful for designing system capacity, but doesn't reflect output throughout the day.
- olegkikin 9y ago1000W/m2 is at noon at the equator without clouds/haze/dust.
- lightedman 9y ago1000W m^2 is actualy closer to high noon at Kansas on a fully clear day (this is equivalent to 2,000 umol/cm^2/s-1) Equatorial solar irradiance is actually higher (closer to 1,050W/m^2) because the equator is just a bit closer to the sun.
- woodandsteel 9y ago>Equatorial solar irradiance is actually higher (closer to 1,050W/m^2) because the equator is just a bit closer to the sun. No, no, no. Equatorial is higher because the sun is more directly overhead on average than in Kansas.
- lightedman 9y agoThat's not how the inverse square law works for photon flux density.