Question

An air conditioner uses 10,832 J of energy to run, but only 5,488 J of energy is used to heat or cool the air of a home. What is its energy efficiency?

Answer 1

The input energy of the air conditioner is

`E_{i\text{ n}}=10832\text{ J}`

The output energy of the air conditioner is

`E_(out)=5488\text{ J}`

The formula to calculate efficiency is

`\eta=\frac{E_(out)}{E_{i\text{n}}}*100\text{ percentage}`

Substituting the values, the efficiency will be

`\begin{gathered} \eta=(5488)/(10832)*100\text{ percentage} \\ =50.66\text{ percentage.} \end{gathered}`

Thus the energy efficiency is 50.66%.