System Design

Maximum qsupply is in December: 11,000 Btu/hour
COP = 4.3
Max pump work = 2,600 Btu/hour

Tout = 38.5 degrees F

Tin = 42 degrees F

UA-pipe = 891
Rs = .7226/Length
Rp = .1571/Length
Rw = .01533/Length

Pipe Length = 800 Feet


Payback Time:
Capital Cost = $3,080
Fuel difference = $220/year

Simple Payback Time = 14.5 years