a. If the surface in Problem 5.10 faces S 45° E, what are the incidence angles?
b. If the collector in Problem 5.10 has a cylindrical surface, what are the incidence angles on June 21 and December 21?
Problem 10
Calculate the incidence angle at noon and 9 a.m. on a fixed flat-plate collector located at 40°N latitude and tilted 70° up from the horizontal. Find i for June 21 and December 21.