The global irradiance was measured in Lisbon, latitude 38,5°N, with a pyranometer to be 532 W/m² and the diffuse irradiance was measured with a pyranometer with a shading ring to be 220 W/m². The measurement was performed at 11.00 solar time on May 10.

a. Calculate the geometric factor for a roof tilted 25° to the south.

b. Calculate the beam irradiance on this roof

Answer rating: 100% (QA)

a The geometric factor for a roof tilted 25 to the south is equa... View the full answer