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Potential for Geothermal Technologies in Heat Recovery

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Potential for Geothermal Technologies in Heat Recovery

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    1. Potential for Geothermal Technologies in Heat Recovery Guy Nelson, Utility Geothermal Working Group (541) 994-4670 energyguy@utilityforum.com

    2. 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

    3. 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

    4. Potential (GW)

    5. Potential by Industry

    6. Typical Steam System Heat Flow

    7. Geothermal Combined Cycle Flow Diagram

    8. ORC Heat Recovery Flow Diagram

    9. 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

    10. Annualized Capital Costs (CC) Capital Costs $2000/kW @ 0.2 Annual Factor, CC = 5.1 /kWh @ 0.15 Annual Factor, CC = 3.8 /kWh @ 0.10 Annual Factor, CC = 2.6 /kWh O&M costs < 1.0 /kWh Fuel Cost = 0

    11. Typical Utility Costs of Doing Business Novec

    12. 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

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