Question

A Carnot heat engine absorbs 235 KW of heat from a heat source and rejects 164 KW to the atmosphere. Determine the thermal efficiency of the heat engine.

Answer 1

43.2%

Step-by-step explanation:

Given that,

Heat absorbed by a carnot heat engine,
`Q_1=235\ kW`

Heat rejected to the atmosphere,
`Q_2=164\ kW`

We need ti find the thermal efficiency of the heat engine. It is equal to the ratio of output work to the energy supplied. Its mathematical form is given by :

`\eta=1-(Q_1)/(Q_2)\\\\\eta=1-(235)/(164)\\\\\eta=-0.432`

or

`\eta=-43.2\%`

The egative value of efficiency shows work is done by the engine.