There is a great impact of temperature in solar cell. I want to calculate temperature degradation gradient. So that I can find it thermally stable or not. Is there any equation or technique to calculate it?
The Nominal Operating Cell Temperature (NOCT) is defined as the temperature reached by open circuited cells in a module under the conditions as listed below:
Irradiance on cell surface = 800 W/m. ...
Air Temperature = 20°C.
Wind Velocity = 1 m/s.
Mounting = open back side.
65°C – 25°C = 40°C, which is the temperature difference between the module's Pmax at STC and the hypothetical example temperature of 65°C reached by the cells.
40°C x -0.41% = -16.4%, which means that the module loses 16.4% in power output when the cells reach 65°C.
Like all other semiconductor devices, solar cells are sensitive to temperature. Increases in temperature reduce the bandgap of a semiconductor, thereby effecting most of the semiconductor material parameters.
I think they typically Nominal Operating Cell Temperature (NOCT) is defined as the temperature reached by open-circuited cells in a module under the conditions as listed below:
Irradiance on cell surface = 800 W/m2
Air Temperature = 20°C
Wind Velocity = 1 m/s
Mounting = open backside. for calculating the cell temperature is given by :
Article Electricity from photovoltaic solar cells: Flat-Plate Solar ...
What do you mean by thermally stable? The unit cannot get hotter than being left in the sun unloaded as ALL the solar energy goes into producing heat in the panel. Any power drawn from the panel will decrease, not increase, the temperature!