Justify why efficiency is one of the most important parameter for any heat engine
Answers
Answer:In thermodynamics, the thermal efficiency ({\displaystyle \eta _{\rm {th}}}{\displaystyle \eta _{\rm {th}}}) is a dimensionless performance measure of a device that uses thermal energy, such as an internal combustion engine, a steam turbine or a steam engine, a boiler, furnace, or a refrigerator for example. For a heat engine, thermal efficiency is the fraction of the energy added by heat (primary energy) that is converted to net work output (secondary energy). In the case of a refrigeration or heat pump cycle, thermal efficiency is the ratio of net heat output for heating, or removal for cooling, to energy input (the coefficient of performance).
Answer: Efficiency is one of the most important parameter for any heat engine.
Explanation:
Heat engine: A heat engine is a device used in engineering and thermodynamics that transforms heat into mechanical energy that may be utilised to do mechanical labour. It accomplishes this by lowering the temperature of a functioning substance from one that is higher. Thermal energy produced by a heat source raises the temperature of the working substance. The working substance transfers heat to the cooler sink until it achieves a lower temperature state while producing work in the engine's working body. By taking use of the qualities of the working substance, some of the thermal energy is transformed into work throughout this process. The working material can be any system with a heat capacity greater than zero, however it is often a gas or liquid.
How much usable work is produced for a given amount of heat energy input is related to the efficiency of a heat engine. In other words, a heat engine takes heat energy from a high-temperature heat source, converts some of it into usable work, and releases the remaining energy as waste heat into a low-temperature heat sink.
So, efficiency is one of the most important parameter for any heat engine.