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What does a heat engine consist of ? OR What are the elements (parts) of a typical heat engine? |
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Answer» The following are the parts of a typical heat engine : (1) Working substance : It can be 1. a mixture of fuel vapour and air in a gasoline (petrol) engine or diesel engine 2. steam in a steam engine. The working substance is called a system. (2) Hot and cold reservoirs : The hot reservoir is a source of heat that supplies heat to the working substance at constant temperature TH . The cold reservoir, also called the sink, takes up the heat released by the working substance at constant temperature TC < TH. (3) Cylinder and piston : The working substance is enclosed in a cylinder fitted with (ideally) a movable, massless, and frictionless piston. The walls of the cylinder are nonconducting, but the base is conducting. The piston is nonconducting. The piston is connected to a crankshaft so that the work done by the working substance (mechanical energy) can be transferred to the environment. |
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