The gas produced in this reaction rapidly expands forcing the piston down the cylinder on the power stroke. I.C engines directly convert chemical energy of the fuel into useful mechanical work. In an Internal combustion engine the combustion takes place inside the cylinderĬhemical energy is released when the fuel-air mixture is burnt in the combustion chamber. ![]() In steam engine, the working fluid (high pressure steam) is generated outside the cylinder by the combustion of fuel.The steam is then passed to a reciprocating engine or turbine for useful work. ![]() ![]() In an External combustion engine the combustion takes place outside the engine. (ii) Internal combustion engines (IC Engines). Heat engines are classified as (i) External combustion engines (EC Engines). ![]() IntroductionA heat engine is a device which transforms the chemical energy of a fuel into thermal energy and uses this thermal energy to produce mechanical work.
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