Problem # p013

Reversible Heat Pump

At steady state, a heat pump maintains the inside of a house at 70oF while the outside temperature is 35oF.
The heat losses of the house through its walls etc. are 130,000 Btu/h.

Determine the minimum theoretical power required to drive the heat pump, in horse power.
1 hp = 2545 Btu/h   ,   0oF = 459.67 oR