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Whose Fault Is It?
Loop Installation Contractor Vs.
HVAC Contractor
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Dom Durbin and Jeff HurstDom Durbin and Jeff Hurst
Basic Responsibilities
Loop Contractor• Design Loop and Piping
System Based on Calculations Provided By Others
• Confirm Soil Conditions Relevant to Pipe Placement
• Install Ground Loop to Industry Standards
• Purge System or Provide Volume and Purging Requirement Calculations
HVAC Contractor• Determine Building Loads
and Associated Ground Loads
• Install Geo Units and Air /Hydronic Delivery Systems
• Size and Install Circulating Pump/s (Possibly Purge)
• Commission System and Educate Owner on Design Use for Best Performance
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Hey Dom, 4 ton Horizontal, 100 Old Creek Road
Thanks For The Work Jeff, We’re On The Way!
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Horizontal Trencher, Maybe…
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Plan B…
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
End Result
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Hot Loop
Why Is The Loop Hot?
Whose Fault Is It?
How Can We Prevent It From Happening Again?
What Can We Do To Fix It?
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Soil Thermal PropertiesSoil Thermal Properties
ThermalTexture Class
Thermal Conductivity
Thermal Diffusivity
W/m °K Btu/ft hr °F cm²/sec ft²/day
Sand or Gravel 0.77 0.44 0.0045 0.42
Silt 1.67 0.96 _____ _____
Clay 1.11 0.64 0.0054 0.50
Loam 0.91 0.52 0.0049 0.46
Saturated Sand 2.50 1.44 0.0093 0.86
Saturated Silt or Clay 1.67 0.96 0.0066 0.61
Hey Dom, 5 Ton Pond Loop, Sink Hole Drive, Hundred Year Old Farm House on The Left
Thanks For The Work Jeff, We’re On The Way!
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Why is Every Pond 20 Ft Deep?
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
300 ft slinky coilper ton
4 ft between coils
ConcreteBlocks for
weight
Nylon Cable Tiesto secure blocks
300 ft coil per tonseparated by scrap
pipe
Traditional Coiled Pond Loop- Southern Climates
High Efficiency Slinky/Matt PondLoop - Northern Climates
Heavy Duty PlasticSafety matting
8-10 Bricks forweight
Reverse ReturnHeader
Nylon Cable Tiesto secure Netting
and bricks
3 foot separation
Pond and Lake LoopsPond and Lake Loops
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Cold Loop, The Pond is an Ice Cube
• Excessive Run Times
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Cold Loop
Why Is The Loop Cold?
Whose Fault Is It?
How Can We Prevent It From Happening Again?
What Can We Do To Fix It?
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Hey Dom, 10 Ton Vertical, On Mansion Hill, Just Get It In and I’ll Take It From There
Thanks For The Work Jeff, We’re On The Way!
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Common Loop and Multi Pump Non Pressurized Flow Station
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Self Purging Non PressurizedSelf Purging Non Pressurized
Cannot Flush Loop
Why Can We Not Remove The Air?
Whose Fault Is It?
How Can We Prevent It From Happening Again?
What Can We Do To Fix It?
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Flow Rates to Achieve 2 ft/secFlow Rates to Achieve 2 ft/sec
Velocity = Gal/ Min * 1 cubic ft/7.48 Gal * 1 min/60 sec * 1/Area of pipe = Ft/Second
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Circulating pump @ 3GPM Per Ton, Where does Velocity Fall Short?Circulating pump @ 3GPM Per Ton, Where does Velocity Fall Short?
Flush Cart with a Boost Pump in Series
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
System Flow Rates to Achieve 2 ft/sec Can Be CalculatedSystem Flow Rates to Achieve 2 ft/sec Can Be Calculated
I Can’t Flush It, Sam Can’t Even Flush It
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Cannot Flush Loop
Why Can We Not Remove The Air?
Whose Fault Is It?
How Can We Prevent It From Happening Again?
What Can We Do To Fix It?
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois
Reverse Return Header Configuration
Geothermal Alliance of IllinoisGeothermal Alliance of Illinois