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Wyandotte Geothermal Utility
Wyandotte Municipal Service
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Overview of Wyandotte Municipal Services
• Provides Water, Electric, Cable, Internet, & VOIP to the citizens of Wyandotte
• Water Utility– Formed in 1889– Approx 10,000 customers– $4 Million in Annual Revenue
• Electric Utility– Formed in 1892– Approx 12,000 customers– $41 Million in Annual Revenue
• Cable Utility– Formed in 1981– Approx 8,500 customers– $9 Annual Revenue
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Why Geothermal Heat Pumps?
• Refer to:Ground-Source Heat Pumps:
Overview of Market Status, Barriers to Adoption, and Options for Overcoming Barriers
US Department of Energy
Submitted by
Navigant Consulting, Inc.
February 3, 2009
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WMS Wants to Remove Barriers• Space Constraints In Urban Areas• Low Market Awareness Among Consumers• The Need for Ground Loop Adds Cost, Complexity,
& Risk• Need Codes for Proper Design & Installation of
Ground Loop• Ground Loop Repair & Maintenance Challenges• Requires Installation Specific Design & Engineering
of Ground Loop
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Why Does WMS Want a Geo-Utility
• Energy Efficiency• Improves system load factor• Is a dispatchable renewable energy source• Lowers customers energy costs• Economic development
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Energy Efficiency
The GSHP is one of the most efficient residential heating and cooling systems available today, with heating efficiencies 50 to 70% higher than other heating systems and cooling efficiencies 20 to 40% higher than available air conditioners. That directly translates into savings for you on your utility bills. Source “International Ground Source Heat Pump Association”
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Improves System Load Factor
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Lowers Customers Energy CostsModel Inputs
Gas Service Fee $ 180.00 Gas Rate $ 1.06 CCF/Ton 0.12Electric Rate $ 0.12874 per Kwh Geo Htg COP 4Customer Charge $ 4.50 GU monthly rate $ 26.75 per tonAnnual hrs heating 2100Annual hrs cooling 1450Inflation, elec, gas, maint 4.00%Inflation GU 2.00%Hot water add for gas 0.35Conv A/C kW/Ton 1.35Geo AC kW/Ton 0.75
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Lowers Customers Energy CostsInputs - Wyandotte Home - Geothermal vs. Conventional
Calculation for Tons = 2Conventional Geothermal Utility
Year Elec Nat Gas MaintTotal Ops
Cost Elec GUCust Chrg Maint
Total Ops Cost
Ann Save
Cum Save
1 $504 $1,168 $210 $1,882 $584 $642 $54 $53 $1,333 $549 $5492 $524 $1,214 $218 $1,957 $608 $655 $54 $55 $1,371 $586 $1,1353 $545 $1,263 $227 $2,035 $632 $668 $54 $57 $1,411 $625 $1,7604 $567 $1,314 $236 $2,117 $657 $681 $54 $59 $1,451 $665 $2,4255 $590 $1,366 $246 $2,201 $683 $695 $54 $61 $1,494 $708 $3,1336 $613 $1,421 $255 $2,289 $711 $709 $54 $64 $1,537 $752 $3,8857 $638 $1,478 $266 $2,381 $739 $723 $54 $66 $1,583 $798 $4,6848 $663 $1,537 $276 $2,476 $769 $737 $54 $69 $1,629 $847 $5,5319 $690 $1,598 $287 $2,575 $799 $752 $54 $72 $1,678 $898 $6,428
10 $717 $1,662 $299 $2,678 $831 $767 $54 $75 $1,727 $951 $7,379
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Lowers Customers Energy Costs• Current Incentives in Wyandotte
– 30% Federal Tax Credit– $1,000/ton Rebate from WMS– 1.99% Unsecured Loans Available
• Also Offering Other Programs– Home Energy Audits– Suite of Other Rebates & Incentives Up to a
total of $6,000.00 per home owner
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How is the Geo-Utility Structured• Wyandotte Geo-Utility provides the ground loop
– 300 ft. vertical bores, goal is to get to 600 ft.
• Ground loop located in public right of ways• WMS assumes all ground loop risks• Full shut off capacity• City passed GSHP Ordinance• Rates based on capacity of systems installed
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What an Installation Looks Like
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Drilling Experience• Urban Area
– Average lot width varies 40 ft. to 70 ft.
• Landscaped yards– Trees, sidewalks, driveways, curbs, porches, etc.
• Artesian Wells– Rotten egg odors
• Fractured Limestone
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Rate Structure & Customer Options• Residential Rate
– Wyandotte drills & owns loop field– $4.50 monthly customer charge + $26.75 per ton
• Maintenance Rate– Property owner pays for well located in public
right of way– $4.50 monthly customer charge + $11.75 per ton
• Property owner installs loop field on their property
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Rate Structure & Customer Options• Residential Rate
– Wyandotte drills & owns loop field– $4.50 monthly customer charge + $26.75 per ton
• Maintenance Rate– Property owner pays for well located in public
right of way– $4.50 monthly customer charge + $11.75 per ton
• Property owner installs loop field on their property
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Process to Become a Customer• Customer
– Decide which rate option works for you– Sign a Service Agreement– Make arrangements for GSHP installation
• WMS will– Locate well on plot plan– Contract driller
• Driller will get permit from City– Complete loop and install service valves
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Revenue Generation Potential
• Well installation permit fee –$200 for first well–$25 for each additional
• Potential Tax revenue with Public Ownership• 30 year payback on well infrastructure•Geothermal Electric Rates•Renewable Energy Credits (RECs)
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Current Status• 52 installations already in the planning and
design stage– 25 new residential installations – 19 retrofit residential installations– 3 commercial installations– 2 new multi-family developments (20 units)– 3 Private home owners subscribed
• 18 loop fields installed• 8 Installations Complete & In Service