How Does the Efficiency Formula Change for Reversible Heat Engines?

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SUMMARY

The efficiency formula for reversible heat engines is defined as n = 1 - (t1/t2), where t1 and t2 represent the absolute temperatures of the heat source and sink, respectively. This formula indicates the theoretical maximum efficiency achievable by a heat engine operating between two thermal reservoirs. In contrast, the efficiency for normal heat engines is calculated using the heat quantities, expressed as n = 1 - (q1/q2), which reflects the actual performance of the system. Understanding these distinctions is crucial for thermodynamic analysis and optimization of heat engines.

PREREQUISITES
  • Understanding of thermodynamic principles
  • Familiarity with heat engine concepts
  • Knowledge of absolute temperature scales
  • Basic grasp of efficiency calculations in physics
NEXT STEPS
  • Research the Carnot cycle and its implications for efficiency
  • Explore the second law of thermodynamics
  • Study real-world applications of reversible heat engines
  • Investigate methods for improving heat engine efficiency
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Students and professionals in thermodynamics, mechanical engineers, and anyone interested in optimizing heat engine performance.

ajayguhan
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efficiency n=1 -(q1/q2) for a normal heat engine

But how efficiency n=1 -(t1/t2) ? for reversible heat engine
 
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When using the temperatures, you find the theoretical highest efficiency possible for a specific system.

When using the "Q" (heat), you find the actual efficiency of the system.
 

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