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Geothermal Alliance of Illinois

Geothermal Alliance of Illinois. Loop Field Sizing. Ground Source “Misconceptions”. Grout isn’t important It works everywhere!!! XXX ft per ton is adequate everywhere!!! The loops must be at fault. A good field. Keeps fluid temperatures between 30 and 90 degrees or less

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Geothermal Alliance of Illinois

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  1. Geothermal Alliance of Illinois Loop Field Sizing

  2. Ground Source“Misconceptions” • Grout isn’t important • It works everywhere!!! • XXX ft per ton is adequate everywhere!!! • The loops must be at fault GAOI -Sizing Fround Lops

  3. A good field • Keeps fluid temperatures between • 30 and 90 degrees or less • Low friction/head loss • Doesn’t leak • Placed correctly • Cost effective GAOI -Sizing Fround Lops

  4. How Geo-Exchange Works Geothermal Bore Field Bore Field acts As a battery storing Heating energy in the summer Releasing it in the winter Thermal Conductivity 7/30/2013 ASHRAE PDS MODULE 3 4 GAOI -Sizing Fround Lops

  5. Hybrid Geo-Exchange Systems Excess Heat FLUID COOLER Cooling Dominated 7/30/2013 ASHRAE PDS MODULE 3 5 GAOI -Sizing Fround Lops

  6. STEP ONE How Much Pipe (Loop) Do We Need In Our System? How Can We Install It? Where Can We Install It? When Can We Install It? What Site Preparation is Needed? • Determine Load of the home • Step Two • Determine loads of the home • Don’t stand on the street and hold up your thumb • Run a manual J or what ever you prefer

  7. Use Your Resources • Most of the Manufactures have sizing programs • EnertechGeoanalyst • Climate Master Geodesigner • WaterfurnaceGeolink

  8. Programs will give you a field • Number of loops • Depth • Pipe size • Type anti-freeze • Use this info to get quotes • Do not rely on driller to decide footage per ton

  9. Larger Home • Call an Engineer • They will use GLHEPRO, Geokiss • Month by month loads and peaks • Conductivity test • Stamped drawing

  10. Where Will We Install The Ground Loop and what type? • Proper Setback Distances • Public Utilities • Private Utilities • Building Entry • Future Land Use • Accessibility • Owner’s Preferencences

  11. How Do We Install The Loop Field?

  12. Horizontal Chain Trenched • Least Costly Method • Quick To Install • Requires Most Space • Dependant on Soil Conditions • Longer Time To Reach Peak Performance • Limits Future Land Use

  13. Horizontal Bucket Trench • Less Costly Method • Requires Large Space • Slightly More Time Consuming • Largest Footprint on Landscape • Effective in Adverse Soil Conditions (Not Rock) • Limits Future Land Use

  14. Horizontal Directional Drill • More Costly Method • Requires Large Space • Dependant On Soil Conditions • Ideal For Avoiding Many Above or Below Ground Obstructions • More Future Land Use Options • Relatively Small Footprint

  15. Pond And Lake Loops • Less Costly Method • Must Have A Pond • Need Permission If Shared Property • Pond Must Be Large Enough • Pond Must Be Deep Enough • Pond Must Be Close Enough

  16. Vertical Drilled Loops • Most Costly Method • Requires Smallest Space • Largest Short Term Mess • Least Dependant On Soil Conditions • Specific Placement Requirements • Three Phase Installation Process

  17. Drilling Is Not An Exact Science • Some Areas Will Be Messier Than Others • Every Site Requires Its Own Consideration • Some Days Are Better Than Others

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