Data for a FPC used for heating the building are given below:

Location & Latitude: Baroda,220N

Day & time: Jan 01 1130-1230(IST)

Annual average intensity and Solar radiation: 0.5

Langley/min.

Collector It: latitude +150

No. of glass covers:2

Heat removal factor of the collector:0.810

Transmittance of the glass:0.90

Top loss coefficient for the collector:7.88W/m2 0c

Collector fluid temperature:600c

Ambient temperature: 150c

Pd (diffusive reflectance) for two covers:0.24

Calculate: I) Solar attitude angle II) Incidence angle & III) Collector Efficiency.