What time of day does tracking have the greatest impact on t

What time of day does tracking have the greatest impact on the harvested power for a flat panel collector? Explain. To obtain 32 V from a PV module, how many individual cells must be used and how should they be connected (assume 0.5 V per cell)? It each cell in the module produces 3A, describe the system required to produce at least 20 A at 32 V.

Solution

18

At the mid day 12.00 noon the tracking has the greatest impact on the harvested power for a flat panel collector. At 12.00 noon the distance travelled between the Sun rays will be very less. The Air mass will be less when the sun is perpendicular to the collector.

The time between 11AM to 1 PM the maximum amount of solar energy is produced in the flat panel collector because the Sunrays will be in the angle of 70degrees to 120 degrees.

When the collector is perpendicular to the sun, a maximum value of incident factor 1 is achieved as the collector is receiving the maximum amount of radiation possible.

19

a) To obtain 32 V from a PV module, totally 64 individual cells must be used and they must be connected in series.

b) if each cell in the module produces 3A, the system must require [ 3 * 7 = 21 ] ie 7 cells are to be connected in parallel to produce 20 A at 32 V.