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Geothermal Energy in Building Energy Systems

Learn about the use of geothermal energy in building energy systems, including heating, cooling, and electricity generation. Explore different types of geothermal installations and their applications. Discover how geothermal energy is being studied and utilized in engineering and sustainability projects.

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Geothermal Energy in Building Energy Systems

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  1. Engineering, Sustainability, and the GeosciencesCourse-level Examples of Geoscience in “Mechanical” Engineering Kevin Amende, P.E. March 7th, 2013

  2. End User Consumption DOE Building Energy Data Book 2011

  3. What are Building Energy Systems? • Systems used to provide • HVAC • Heating • Cooling • Indoor Air Quality (Ventilation) • Electricity • Lighting • Water Management

  4. What are Building Energy Systems? • Building Envelope • Location & Orientation • Energy Distribution (what is available) • Energy Generation • Power management (Control systems)

  5. What is Geothermal Energy? • Energy generated in the Earth (Core) • Big “G” has high temperatures • Used for district heating • Used for electricity generation • Energy stored in the Earth (Solar) • Little “g” typically lower than 70oF • Used for heating and cooling, district and non-district

  6. How is it Transferred? • Open Loop • Gas (steam) driven by pressure to surface and used to rotate turbine impellers • Hydro (water) driven by pressure to surface and piped into a heat exchanger (HEX) • Closed Loop • Glycol or water pumped through a continuous pipe (down and up the bore)

  7. Bore Field Types • Open Loop (pump and dump) • Underground water-source • Lake • River • Etc…

  8. Bore Field Types • Closed Loop • Buried ground-heat exchanger (GHEX) • Vertical bore field • Horizontal field (bore or excavate) • Lake • Pond • Municipal water supply

  9. Lake/Pond HEX

  10. Vertical Closed Loop GHEX

  11. Horizontal Closed Loop HEX

  12. Horizontal Earth-Air HEX

  13. Geothermal GHEX Installation

  14. Ecosmart House Project www.montanaecosmart.com

  15. Ecosmart House Project

  16. Vertical GHEX Installation

  17. Geothermal as a Utility? • OG&E Ground Source Heat Exchange Study • Utility company project coordinator • Hope Crossing (Habitat for Humanity) site in Oklahoma City, OK • OSU performing thermal response tests (TRT) on various geothermal HEX

  18. Fly Ash Grout • Development of new grout mixtures for geothermal applications • Thermal performance (conductivity) • Fluidity • Collaboration between Civil and Mechanical Engineering

  19. Where are doing this in the curriculum? • ETME 423 – Heating, Ventilation, and Air-Conditioning II (HVAC II) • ETME 424 – Thermal Processes Lab • ETME 489/499 – Senior Capstone I & II

  20. Questions?

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