Consider a crystalline PV module with the following output parameters mentioned at STC (Standard Testing Condition) conditions by the manufacturer.

Pmax = 250W

Voc = 50V

Isc = 6A

NOCT = 40°C

Temperature coefficient of power = -1W/°C

a) If the ambient temperature falls to 0°C while the irradiance is 1000W/m², what is the cell level temperature in °C, as per the NOCT model?

b) What is the new power output of the PV module in Watts, under the ambient temperature of 0°C and 1000W/m² irradiance?
please help!!

40

wrong answer.

25

To calculate the cell level temperature and the new power output of the PV module, we will use the NOCT model and the temperature coefficient of power. Here's how:

a) To calculate the cell level temperature (Tcell) using the NOCT model, you can use the following formula:

Tcell = Tamb + ([NOCT - 20] / 0.8)

Where:
Tcell = Cell level temperature in °C
Tamb = Ambient temperature in °C
NOCT = Nominal Operating Cell Temperature (given as 40°C)

In this case, Tamb is given as 0°C. Plugging in these values, we get:

Tcell = 0 + ([40 - 20] / 0.8)
Tcell = 0 + (20 / 0.8)
Tcell = 0 + 25
Tcell = 25°C

Therefore, the cell level temperature at 0°C ambient temperature would be 25°C.

b) To calculate the new power output of the PV module under the given conditions, we can use the temperature coefficient of power (-1W/°C). The formula for calculating the new power output is:

Pnew = Pmax + (Tcell - 25) * Temperature coefficient of power

Given that Pmax is 250W and Tcell is 25°C (as calculated in part a), we substitute these values into the formula:

Pnew = 250 + (25 - 25) * (-1)
Pnew = 250 + 0 * (-1)
Pnew = 250 + 0
Pnew = 250W

Therefore, the new power output of the PV module at 0°C ambient temperature and 1000W/m² irradiance would still be 250W.