The air cooled can be more efficient because they will use less energy. They are difficult to maintain if it stays too hot.
It is the housing standard on a motor Totally Enclosed Fan Cooled
It is cooled to liquid and fed back into the boiler for reheating.
relies on natural convection and doesn't use a fan
A hot tank oil system is one, in which returning oil in not cooled when it comes back to the tank . In a cold tank it is cooled before it reaches the tank.The only difference is the location of the oil cooler whether its downstream or upstream.
Sodium is a solid at room temperature and becomes a liquid at 97.5 degrees Celsius. Sodium cooled valves are exhaust valves in a cylinder head of an engine that open to release exhaust gasses that were formed due to combustion of fuel and air inside the cylinders and typically get very hot. The sodium cooled valves and exhaust valves filled with sodium inside, the sodium helps the valves be cooler than if they were just solid.
Advantages of Rubber is it is flexible and can be moulded into any shape. Disadvantages are when heated it expands and when cooled it contracts.
it is trouble free and can work long hours, the only problem is the weight
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It is hot and must be cooled before consumption.
depends on the cooling required ex:-suppose if cooling upto 20c is required the area cooled will be higher as compared to cool upto 15c...........
Air cooled condensers are of two types: natural convection and forced convection. In the natural convection type, the air flows over it in natural a way depending upon the temperature of the condenser coil. In the forced air type, a fan operated by a motor blows air over the condenser coil.
The refrigeration system used in air conditioners with rotary compressor, the discharged gas is entered firstly into the doom of the compressor, while the system used with reciprocating and other compressors, it is admitted into the discharge tube. and are suction cooled. Why in rotary systems, the discharge refrigerant directly admit into the doom first.
The condenser is a coil in a refrigeration system. It is on the low pressure side and is exposed to ambient air temp. The refrigerant goes through that and is cooled off and is then sent to the compressor.
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Advantages: -Cylinders only need a thin water jacket around them, instead of cooling fins, which take up more space. -With a water cooled engine, you can have a real heater/ demister. -More efficient heat transfer than air cooling. - Engine temperature can be kept more constant, using a thermostat. Disadvantages: Prone to leaks , and has moving parts that can fail and cause overheating.
When rubber is heated it expands, and when it is cooled is contracts- depending on what it is used for it could be an advantage.
Generally, air cooled engines require less maintenance associated with a wet cooling system. Hoses, pumps, and radiators naturally age and eventually will leak or fail in another manner.