Increase of Cooling Performance in Refrigeration System using Flue Gas Waste Heat with Cascade Refrigeration System

In this the waste heat sent to the atmosphere is utilized by the waste heat recovery system. Here the heat is utilized for the purpose of vapourizing the refrigerant mixture in Vapour Absorption System. For that the heat from the flue gas of coal burning industries is utilized. The temperature of flue gas be normally above 220 OC, which is enough for the generator work. A Compression-Absorption Cascade Refrigeration System is used here. Normally compression systems are cascaded for getting higher effect than produced by single system. But the power requirement for this is more. Absorption system requires less heat input for its operation which can be supplied by renewable energy sources. In this system the generator temperature of VARS system is about 90 OC. By using cascading system for 5OC sub-cooling which cause increase in COP of 16.05%. With that the power used for the purpose of refrigeration system in the same industry can be reduced.