Engines

Engines
Stages in Engines
Components of Engines
Advantages of IC Engines over EC Engines
NEXT>>Internal Combustion Engines

Engines


A Heat engine is a device which transforms the chemical energy of a fuel into thermal energy and uses this energy to produce mechanical work.

Heat engines are classified into two broad types:

* External Combustion(EC) Engines

* Internal Combustion(IC) Engines


In an external combustion engine, the products of combustion of air and fuel transfer the heat generated to a second fluid which is the working fluid of the cycle ( like water is for a steam engine, where the heat is used to generate steam from water, which in turn is used to power the piston or a turbine).

Another good example of an External Combustion Engine is a closed Cycle gas turbine wherein the heat generated from a closed furnace is transferred to gas, usually air, which is then used in the gas turbine.

In an Internal Combustion Engine, the products of combustion would directly move the piston of the engine. Gasoline, Diesel, Wankel engines and open gas turbines are all examples of an Internal Combustion Engine.





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Components of Engines
































Stages in Engines


































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Advantages of IC Engines over EC Engines


* The IC engines are generally simpler and offer much greater mechanical simplicity compared  to the EC engines.

* The IC engines have a lower weight -to-output ratio due to the absence of auxiliary units like   boilers and condensers that are required for an External Combustion Engine.

* The cost of manufacturing an IC engine is much lesser owing to the ease and standardization  in production and

* Higher overall efficiency in operations as compared to the EC Engines because most of it is  within the engine and not much energy produced is lost.

* EC engines cannot be used for smaller requirements like in transportation. But IC engines can  be used due to their compact size.







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For more details on 2-Stoke & 4-Stoke Engines, follow the link given below- 2-Stroke & 4-Stroke IC Engines











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