Intro to Heat Engines Video Lessons

Concept

# Problem: An engine uses hydrogen undergoing a cycle with the following steps:i) Isothermal compression from V0 to 0.5V0ii) Isobaric expansion until the volume returns to the initial volumeiii) Isochoric cooling until the pressure returns to the inital pressureWhat is the thermal efficiency of this engine? How does it compare to the efficiency of a Carnot engine operating between the maximum and minimum temperatures of the cycle? Note: for an isothermal expansion from Vi to Vf, W=nRT*ln(Vi/Vf)

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###### Problem Details

An engine uses hydrogen undergoing a cycle with the following steps:

i) Isothermal compression from V0 to 0.5V0

ii) Isobaric expansion until the volume returns to the initial volume

iii) Isochoric cooling until the pressure returns to the inital pressure

What is the thermal efficiency of this engine? How does it compare to the efficiency of a Carnot engine operating between the maximum and minimum temperatures of the cycle? Note: for an isothermal expansion from Vi to Vf, W=nRT*ln(Vi/Vf)