He essentiallt states that you can only get a certain maximum % out of exnapsnio engines if you expand them to absolute zero in a vacuum.
Since you expand to room temperature and pressure, the equation determines that efficiency. That is why car engines are 35% or efficient. Specialized constant speed diesels a bit better and turbines close to 60%
https://energyeducation.ca/encyclopedia/Carnot_efficiency.
He essentiallt states that you can only get a certain maximum % out of exnapsnio engines if you expand them to absolute zero in a vacuum. Since you expand to room temperature and pressure, the equation determines that efficiency. That is why car engines are 35% or efficient. Specialized constant speed diesels a bit better and turbines close to 60%