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West Chester University “ Geothermal HVAC System Comprehensive Plan ”

West Chester University “ Geothermal HVAC System Comprehensive Plan ”. Taken from presentation by: Neal Babcock & Howard Alderson, P.E. Alderson Engineering, Inc . February 26, 2008. Closed Vertical Loop. Typical Installation: 100 to +150 ft/ton; 15’ x 15’ to 20’ x 20’ spacing

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West Chester University “ Geothermal HVAC System Comprehensive Plan ”

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  1. West Chester University“Geothermal HVAC SystemComprehensive Plan” Taken from presentation by: Neal Babcock & Howard Alderson, P.E. Alderson Engineering, Inc. February 26, 2008

  2. Closed Vertical Loop • Typical Installation: • 100 to +150 ft/ton; • 15’ x 15’ to 20’ x 20’ spacing • HDPE Piping

  3. Building HVAC Load

  4. Campus Block Load 4,600 Tons 6,500 Tons

  5. Monthly Geothermal Borefield Heat Gain/Loss

  6. Thermal Conductivity of Rock & Soil • Underground soil/rock formation strongly affects the performance of the well field; • Sands and Clays; • Rock; • Affects type of Grouting used.

  7. Pumping • Primary Loop • Variable Flow • Circulates around the Campus • Secondary Loop #1 • Variable Flow • Circulates thru Borefield • Secondary Loop #2 • Variable Flow • Circulates within a Building

  8. Geothermal Trench Detail

  9. Site Distribution Trench Detail

  10. Site Distribution Connection Detail

  11. Geothermal “Short” Building Connection Detail

  12. Geothermal “Tall” Building Connection Detail

  13. Geothermal Flow Diagram

  14. Materials • Campus Distribution Loop: • HDPE Pipe; 160 PSI Rated • No Insulation • Borehole Piping • HDPE Pipe; 160 PSI Rated • No Insulation • Isolation Valves • Butterfly; 150 PSI Rated • Distribution Isolation Valves • Butterfly/Ball Valves; 150 PSI Rated • Borehole Grout • Thermally Enhanced Bentonite; K=1.2

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