Define the following :
(a) Boot Strap Air Evaporative System
(b) Simple VCR System
(c) Advantage and disadvantage of VCR system over Air Refrigeration System
(d) Reduced Ambient Air Cooling System
(e) Define a refrigerant. Describe primary, secondary and eco-friendly refrigerants with examples. Also discuss the physical and thermodynamic properties of the following refrigerants :
R-11, R-12, R-22, R-717
(f) Illustrate with neat sketches various methods of refrigeration.