Potential for Geothermal Technologies in Heat Recovery

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Potential for Geothermal Technologies in Heat
Recovery

• Guy Nelson, Utility Geothermal Working Group
• [phone] energyguy_at_utilityforum.com

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Typical Waste Heat Sources

• Utility Industries
• Heavy Industries Steel, Aluminum, Copper,
  Cement, Pulp Paper, and Glass
• Refinery and Petrochemical Plants
• Incinerators/Gasification/Combustors
• Gas Compression/Pipelines

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Unit Operations Generating Waste Heat

• Boilers, heaters and furnaces (gas, diesel,
  coal, nuclear, refuse, petroleum, and coke)
• Gas turbine exhaust
• Steam turbine exhaust
• IC engine exhaust

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Potential (GW)
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Potential by Industry
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Typical Steam System Heat Flow
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Geothermal Combined Cycle Flow Diagram
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ORC Heat Recovery Flow Diagram
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Cost Comparison

• Conv ORC
• Geo Heat Rec
• Resource assessment (1) 2.5 M
  1.0 M
• Well field development 7.5 -0-
• Power plant transmission 15.0
  15.0
• Other costs(2) 5.0
  4.0
• TOTAL COST FOR 10 MW PROJECT 30 M
  20 M
• (1) Includes exploration costs
• (2) commitment, consulting, development,
  contigency, legal accounting fees, interest
  during construction, and operating reserve

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Annualized Capital Costs (CC)

• Capital Costs 2000/kW
• _at_ 0.2 Annual Factor, CC 5.1 /kWh
• _at_ 0.15 Annual Factor, CC 3.8 /kWh
• _at_ 0.10 Annual Factor, CC 2.6 /kWh
• OM costs lt 1.0 /kWh Fuel Cost 0

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Typical Utility Costs of Doing BusinessNovec
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In Summary

• Waste heat recovery applications using geothermal
  technologies are available with less risk,
  because the heat sources can be easily quantified
  and accessed without drilling
• The major barrier to widespread deployment is the
  lack of awareness of the technology and its
  economic and environmental benefits