A heat engine that receives heat from a furnace at 1200^∘ C and rejects waste heat to a river at

step 1 In this problem, we're told that we have some process that takes some material at 1 ,200 degrees

A heat engine that receives heat from a furnace at 1200^∘ C...

A heat engine that receives heat from a furnace at $1200^{\circ} \mathrm{C}$ and rejects waste heat to a river at $20^{\circ} \mathrm{C}$ has a thermal efficiency of 40 percent. Determine the second-law efficiency of this power plant.

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Carnot Efficiency

Carnot efficiency represents the upper limit of efficiency that any heat engine can achieve operating between two thermal reservoirs. It is determined solely by the absolute temperatures (in Kelvin) of the hot and cold reservoirs and is a direct result of the second law of thermodynamics, indicating the maximum possible performance in an ideal reversible process.

Second-Law Efficiency

The second-law efficiency, also known as exergy efficiency, compares the actual performance of a heat engine to the maximum possible performance dictated by the Carnot cycle. It is calculated by taking the ratio of the actual efficiency to the Carnot efficiency, thereby quantifying how effectively a system avoids irreversible losses and utilizes the available thermal potential for work.

Heat Engine Efficiency

This concept refers to the ratio of the work output produced by a heat engine to the heat energy input it receives. It embodies the first law of thermodynamics by showing how effectively a heat engine converts thermal energy into mechanical work.

Transcript

Please give Ace some feedback