Geothermal System In Phoenix Arizona

GeoComfort GCT036 Geothermal Heat Pump

• 38,900 Btu/hr Cooling Capacity
• 28,500 Btu/hr Heating Capacity
• Desuperheater for Hot Water Heating
• 1000 CFM Airflow Rate
• 2.68 kW at Full Load
• 6000 Btu/hr, 24 GPH Water Heating Capacity
• 4 Feet Head Loss

Vertical Ground Loop

• 1200 Feet HDPE 1.25" Piping
• 6 - 100 Foot Deep Bore Holes
• 7 GPM Flow Rate
• 73 Degree Fahrenheit Ground Temperature
• At Full Load, Loop Temperature
• 108 deg F Incoming Temp
• 97 deg F Outgoing Temp
• 45,000 Btu/hr Heat Dissipated in Loop
• 10 Feet Head Loss

 

 Wilo-Stratos ECO 16 F Pump

• 120 Watts
• At 7 GPM, 24 Ft of Head Loss

Energy Use

• Heat Pump -- 2.68 kW
• Pump -------- 0.12 kW
• Total --------- 2.80 kW

Economics

•  Heat Pump Price -------- $10000
• Ground Loop Price
• at $15 per foot ---- $9175
• Pump ---------------------- $500
• Total Cost ----------------- $19675
• Cost With 30% Rebate -- $13773

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• Annual Costs with Geothermal ------------- $350 
• Annual Costs with AC and Water Heater- $ 1502

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• Payback Time --- 9.4 Years