1. Vapor refrigeration cycle with sub-cooling and super-heating. 2. Vapor Absorption cycles 3. Vapor refrigeration cycle with reheating and regeneration. 4. Psychrometry and its application to air-conditioning 5. Cooling towers. 6. Compressible flows in Channels or Nozzles. 7. One-dimensional steady flow in ducts or nozzles. 8. Supersonic and subsonic flows. 9. Flow with friction and heat transfer. Requirement: You have to write a review report only. Your report should include research papers. In the report, you must include: 1. What is done, how is done and the results of each research paper 2. Reference list 3. 10 to 15 pages .