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ARMY ADMINISTRATION FACILITY Mid-Atlantic Region

ARMY ADMINISTRATION FACILITY Mid-Atlantic Region. Alexander Quercetti Mechanical Option. Advisor: Dr. Stephen Treado. PRESENTATION OUTLINE. ARMY ADMINISTRATION FACILITY Mid-Atlantic Region. Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage

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ARMY ADMINISTRATION FACILITY Mid-Atlantic Region

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  1. ARMY ADMINISTRATION FACILITY Mid-Atlantic Region Alexander Quercetti Mechanical Option Advisor: Dr. Stephen Treado

  2. PRESENTATION OUTLINE ARMY ADMINISTRATION FACILITY Mid-Atlantic Region Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Breadth: Architectural Conclusion Acknowledgements Questions Alexander Quercetti Mechanical Option Advisor: Dr. Stephen Treado

  3. Introduction PRESENTATION OUTLINE Occupant | U.S. Army Legal Service Agency Location | Undisclosed Size| 97,000 SF Total Project Cost| $30 Million Dates of Construction| Sept 2010 – Sept 2011 Project Delivery Method| Design-Build Sustainability| LEED Silver Certified Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  4. Existing Conditions Airside System PRESENTATION OUTLINE • Penthouse on 4th floor Building Background Existing Conditions Airside Waterside Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions DOAU Penthouse • 24,000 CFM Dedicated Outdoor Air Unit • 150 Fan Powered Induction Units each serving 3 spaces Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  5. Existing Conditions Waterside System PRESENTATION OUTLINE • 315 ton Evaporative Condensing Chiller serves 55 F CHW to DOAU and FPIU cooling coils Building Background Existing Conditions Airside Waterside Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions • (2) 1500 MBH Gas-Fired Boilers serve 180 F HHW to DOAU and FPIU heating coils • Domestic hot water served by solar hot water heater Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  6. Ground-Source Heat Pump PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Geological Survey System Layout Cost Analysis Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions • Objectives: • Install a vertical loop ground-source heat pump system to replace the chiller and boilers. • Reduce utility costs Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  7. Ground-Source Heat Pump Geological Survey PRESENTATION OUTLINE * Identifying correct soil characteristics is integral to proper system design. Building Background Existing Conditions Depth 1: Geothermal Geological Survey System Layout Cost Analysis Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions Grout Water Grout is used between U-tube and ground to seal from air gaps and surface water penetration. 55 °F ground temperature Thermal resistanceground= 1.0 h-ft-°F/Btu Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  8. Ground-Source Heat Pump System Layout PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Geological Survey System Layout Cost Analysis Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions • Vertical- • 150 to 600 ft. deep. • Perpendicular to ground • More expensive to install • More efficient heat exchange= less piping • Horizontal- • 6 ft. deep typ. • Parallel to ground • Cheaper to install • Requires much longer piping Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  9. Ground-Source Heat Pump System Layout 500 bores, each 500 ft. deep 20 ft. separation PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Geological Survey System Layout Cost Analysis Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions 251,700 ft. bore length • Vertical Loop 31 16 Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  10. Ground-Source Heat Pump System Layout PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Geological Survey System Layout Cost Analysis Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions • Vertical Loop Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  11. Ground-Source Heat Pump Cost Analysis Utility Costs PRESENTATION OUTLINE Initial Investment Building Background Existing Conditions Depth 1: Geothermal Geological Survey System Layout Cost Analysis Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions Energy Consumption Emissions Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  12. Thermal Storage PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions • Objectives: • Install a thermal storage system to decrease energy consumed by the chiller • Reduce electric costs Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  13. Thermal Storage Chilled Water vs. Ice PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions • Chilled Water: • Requires Less Chiller Energy • Easier to Regulate Water Temps • Cheaper • Heat Transfer Less Effective • Ice: • Requires More Chiller Energy • Difficult to Regulate Water Temps • More Expensive • Heat Transfer More Effective Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  14. Thermal Storage Chilled Water vs. Ice Partial vs. Full Storage PRESENTATION OUTLINE • Partial: • Chiller runs 24 hours • Lower chiller capacity • During on-peak, chiller and storage supply load Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions • Chilled Water: • Requires Less Chiller Energy • Easier to Regulate Water Temps • Cheaper • Heat Transfer Less Effective Storage Meets Load Tons Storage Storage Chiller Meets Load 24-hour Period • Full: • Chiller runs 12 hours • Higher chiller capacity • During on-peak, storage supplies load Tons Storage Storage Storage Meets Load Chiller Meets Load Chiller Meets Load 24-hour Period Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  15. Thermal Storage Stratified Tank PRESENTATION OUTLINE Less dense warm water floats over denser cold water, Thermocline inhibits mixing of warm and cool water Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions Off-Peak On-Peak Cold chiller water enters tank at bottom and pushes warm water out top to chiller Cold water leaves tank at bottom to go to loads and warm water enters chiller or top of tank Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  16. Thermal Storage System Layout PRESENTATION OUTLINE • Chilled Water Stratified Tank Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions 120’ Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  17. Thermal Storage System Layout PRESENTATION OUTLINE Partial Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions Partial Storage Full Storage Full Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  18. Thermal Storage Initial Investment Cost Analysis PRESENTATION OUTLINE Partial Storage Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions Full Storage Partial Storage Full Storage Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  19. Thermal Storage Payback Cost Analysis Utility Costs PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage System Type Stratified Tank System Layout Cost Analysis Breadth: Acoustics Conclusion Acknowledgements Questions Partial Storage Full Storage Partial Storage Utility Costs Full Storage Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  20. Acoustical Breadth Objective PRESENTATION OUTLINE NC 35 max Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Objective Existing Sound Levels Proposed Solution Conclusion Acknowledgements Questions NC 30 max Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  21. Acoustical Breadth Existing Sound Levels PRESENTATION OUTLINE NC 35 max Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Objective Existing Sound Levels Proposed Solution Conclusion Acknowledgements Questions TL = 20 log(fms) - 47.3 Rm. 4071 DOAU Penthouse Rm. 4065 LR = LS – TL + 10 log (S/RR) NC 30 max Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  22. Acoustical Breadth Proposed Solution PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Objective Existing Sound Levels Proposed Solution Conclusion Acknowledgements Questions • Green • Glue • Penthouse • On Roof Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  23. Conclusion Recommendations PRESENTATION OUTLINE • Implementation of Thermal Storage: • Partial Storage: • $285,000 extra investment • $48,000 savings each year • Payback in 7 years • Full Storage • $350,000 extra investment • $39,000 savings each year • Payback in 10 years Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Conclusion Recommendation Acknowledgements Questions • Implementation of ground-source heat pumps: • $41,000 extra investment • $5,500 extra each year • More Emissions NOT Recommended Recommend Chilled Water Thermal Storage- Partial Storage Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  24. Acknowledgements I Would Like to Thank: PRESENTATION OUTLINE Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions Dr. Treado Dr. Bahnfleth Prof. Holland Prof. Parfitt Dr. Srebric Dr. Freihaut Prof. Ling Ryan TerMeulen Mike Kilkeary Southland Industries Family Friends Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  25. Acknowledgements I Would Like to Thank: PRESENTATION OUTLINE Images www.southlandind.com www.ashrae.org www.b-es.org www.mcquay.com www.anmascorp.com www.architerials.com www.esource.com www.greengluecompany.com Building Background Existing Conditions Depth 1: Geothermal Depth 2: Thermal Storage Breadth: Acoustics Conclusion Acknowledgements Questions Dr. Treado Dr. Bahnfleth Prof. Holland Prof. Parfitt Dr. Srebric Dr. Freihaut Prof. Ling Ryan TerMeulen Mike Kilkeary Southland Industries Family Friends Questions? Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  26. Appendices Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  27. Appendices Loop Head Pressure Q,gpm=292tons/500bores=0.58tons/bore*3 gpm/ton=1.75 [gpm/bore] dbranch = 1-1/4” dheader = 6” where, Fsc = short-circuit heat loss factor Lc = required bore length for cooling, ft Lh = required bore length for heating, ft PLFm = part-load factor during design month qa = net annual average heat transfer to ground, Btu/h qlc = building design cooling block load, Btu/h qlh = building design heating block load, Btu/h Rga = effective thermal resistance of ground (annual pulse), h-ft-°F/Btu Rgd = effective thermal resistance of ground (peak daily pulse), h-ft-°F/Btu Rgm = effective thermal resistance of ground (monthly pulse), h-ft-°F/Btu Rb = thermal resistance of bore, h-ft-°F/Btu tg = undisturbed ground temperature, °F tp = temperature penalty for interference of adjacent bores, °F twi = liquid temperature at heat pump inlet, °F two = liquid temperature at heat pump outlet, °F Wc = system power input at design cooling load, W Wh = system power input at design heating load, W Head loss through branch = 0.5 ft / 100 ft For Nominal Size 1-1/4”, ft= 0.022 90° elbow: K = 30 ft, ft =0.022 K = 30(0.022) = 0.66 L= 3.5 ft Total Equivalent Branch Length: Actual pipe length 1235 ft (4) 90° elbows 14 ft_ Total 1249 ft 0.5 ft100 ft* 1249 ft = 6 ft Head Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  28. Appendices Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

  29. Appendices Alexander Quercetti Mechanical Option Army Administration Facility Mid-Atlantic, USA

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