Engines have some blow. It is mostly got past the piston ring and into the crank case. To remove these, air is circulated through crank case when the engine is running. This is called crank case ventilation. The crank case ventilation system prevents build up and oil leakage. In addition, it removes blow by gas to prevent the formation of corrosion and sludge (sludge is thick , creamy , black substances that can form in the engine. It clogs oil screens and lines thereby preventing oil circulation)
Advantages Of Air Refrigeration : 1. The refrigerant used namely air is cheap and easily available. 2. There is no danger of fire or toxic effects due to leakages. 3. The weight to ton of refrigeration ratio is less as compared to other systems. Disadvantages Of Air Refrigeration : 1. The quantity of Refrigerant used per ton of refrigeration is high as compared to other systems. 2. The COP of the system is very low. Therefore running cost is high. 3. The danger of frosting at the expander valves is more as the air contains moisture content.
Comments
Post a Comment