+**Thermal Efficiency** is a measure of how effectively a [heat engine](/wiki/heat_engine) or power cycle converts heat input into useful [work](/wiki/work). It represents the ratio of output work to the total heat energy supplied, defining the system's performance. No system can achieve perfect efficiency, as dictated by the laws of thermodynamics.
+## See also
+- [Carnot Cycle](/wiki/carnot_cycle)
+- [Thermodynamics](/wiki/thermodynamics)
+- [Energy](/wiki/energy)
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