Question

If the cost of this work input is 10¢/kW · h, how does its cost compare with the direct heat transfer achieved by burning natural gas at a cost of 86.0 cents per therm. (A therm is a common unit of energy for natural gas and equals 1.055 ✕ 108 J.) cost of heat pump cost of natural gas =

Answer 1

Step-by-step explanation:

One therm = 1.055 x 10⁸J

= 1.055 X 10⁵ kJ

=
`(1.055*10^5)/(60*60)`kWh

29.3055 kWh

cost of 29.3055 kWh is 86 cent

or cost of imput=
`(86)/(29.3055)`

= 2.93 cent /]kWh

compare it with cost rate quoted earlier which each was

= 10