How can I calculate the power delivered using geothermal energy and an aquifer?

[Donna14]

Homework Statement

See attachment

Homework Equations

I guess I need to do something with this equation:
P= c_mρJΔT

ρ is then the density of water 1000m³/kg
J is given
Cm is given
But what to do with the temperatures... ΔT= Th-Ta? But then you get a negative number and the ask for the power delivered...

 

[NascentOxygen]

Sounds like you have the right idea. The energy the water loses equates to that energy going to heating the house.

Don't forget that power = rate of delivering energy