Question #1 a) Name two different types of Solar Collectors. Describe with suitable diagram any one of these Collectors. b) Determine the outside temperature at which the efficiencies of a single and a double cover collector are the same. The inlet temperature is 70°F and the Insolation I-300 BTU/hr. ft. The Performance curves are shown in the figure attached. Question #2 a) What is the basic difference between an Active and a Passive Solar Heating Systems? b) Name two different types of Passive Solar Heating Systems. Describe with suitable diagram any one of these Passive Systems. Question # 3 a) What are the two Principal methods of lowering Air Temperature for Comfort Cooling? b) Name two different types of Refrigeration Systems for Space Cooling. Describe with suitable diagram any one of these Refrigeration Systems. 1(b) (x, SOME USEFUL RELATIONS m = Y₂-Y₁ X2-X1 (X2172) y = mx + c COLLECTOR PERFORMANCE CURVE 0.75 0.65 Solar collector performance curve 2 Collector efficiency 0.50 0.25 Flow rate: 2CFM/Ft collector A - Single cover B-Double cover. B 0.2 0.4 0.6 0.8 1.0 (T-T)/I Hr-Ft-*F BTU Solar collector performance curve. Flow rate, 2 cfm/ft³ col- lector. A, single cover; B, double cover.