University of Maryland s Gossett Field House College Park, MD

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2 Presentation Outline Project Background Existing Mechanical System Mechanical Redesign Structural Redesign Electrical Redesign Conclusions & Recommendations Acknowledgements Questions

3 Project Team Owner: Architect: MEP: Structural: University of Maryland Bignell, Watkins, & Hasser Schlenger/Pitz & Associates The Watkins Partnership

4 Project Information Square Footage: 65,000 SF Number of Floors: 2 Existing 1 st Floor: 25,000 SF Existing 2 nd Floor: 15,000 SF Total Renovated Area: 40,000 SF 2 nd Floor Addition: 25,000 SF

5 Existing 1 st Floor Spaces Weight Room Home/Visitor Locker rooms Coaches Offices Trainers Room Existing 2 nd Floor Spaces Additional Support Offices

6 2 nd Floor Addition Full Service Kitchen Dining Area with Terrace over looking Byrd Stadium 250 seat Auditorium Hall of Fame Corridor Classroom/Tutor Rooms Computer Lab

7 Existing Air Side System Renovation Section: AHU - 1 Serves 2 nd floor office space AHU 2 Serves 1 st floor - 100% OA unit with no energy recovery Duct mounted hot water booster coils

8 Existing Air Side System 2 nd Floor Addition Section: Six Packaged Rooftop Units - 3 CAV Units - 3 VAV Units VAV boxes with hot water reheat coils used as terminal devices Air flows from cfm

9 Existing Water Side System Air Cooled Liquid Chiller 270 tons Steam to HW Heat Exchanger 110 gpm Two Chilled water pumps 650 gpm, 15 hp Four hot water pumps - 80 gpm, 1 ½ hp - 25 gpm, ¾ hp

10 Convert to Central Plant Operation - Steam/HW Heat - Chilled Water Use Sensible/Latent Energy Recovery Ventilators to Reduce Load on Central Plant Use VAV boxes with reheat for all terminal devices Mechanical Redesign

11 Minimize First Cost Difference Reduce Annual Operating Costs Create a more Homogeneous System Objectives of Redesign Eliminate Gas Fired Heat Make use of Resources Available Minimize impact on other Building Systems Minimize impact on Steam Plant

12 Design Load Comparison Total Cooling MBH: Total Heating MBH: Total Reheat MBH: Total Reheat GPM: Total CFM: Existing System Proposed System

13 Air Side Cost: Water Side Cost: Ductwork Cost: Total First Cost: First Cost Comparison Existing System $157,275 $185,325 - $342,600 Proposed System $205,175 $341,825 - $128,900 $418,100

14 Utility Rates Provided by UMD Facility Manager Annual Cost Data generated through HAP Analysis Electric Rate: Gas Rate: Steam Rate: $0.65/Kwh $0.80/therm $18.00/1000# Washington, DC used as Simulation City Annual Cost Existing System $51,751 Proposed System $40,782

15 First Cost Life Cycle Cost Total Cost Total Cost Comparison Existing System $342,600 $537,160 $879,760 Proposed System $418,100 $423,305 $841,405 Life Cycle Cost Calculated over 15 years, using a 5% Interest Rate Proposed System Saves $38,355

16 AHU-1 AHU-2 RAC-1 RAC-2 RAC-3 RAC-4 RAC-5 RAC-6 University of Maryland s Structural Redesign - AHUs Existing System 18,500 11,750 5, ,200 3,000 5,200 1,300 No Significant Structural Impact from AHUs Proposed System 18,150 11,000 4, ,850 2,750 4,850 1,150

17 Structural Redesign Cooling Towers Ultimate Load (kip/ft): Mmax (kip-ft): Vmax (kip): Selection: Beam Pass Shear/Moment? Beam Pass Deflection: At a cost of $595 per ton, steel for cooling towers would cost approx $ x31 Yes Yes

18 Original Equipment Removed AHUs - 480/277 V A Panel Boards Water Side Equipment - 480/277 V A Panel Board Total Load Removed: KVA Electrical Redesign Proposed Equipment Added AHUs - 480/277 V A Panel Board Water Side Equipment - 480/277 V A Panel Board VAV Boxes - 480/277 V A Panel Boards Total Load Added: KVA

19 Acknowledgements Richard Naldrett Schlenger/Pitz & Associates Frank Watkins Bignell,, Watkins & Hasser John Vucci UMD Facilities Manager AE Faculty and Staff Fellow AE Students Family, Siblings & Girlfriend

20 Questions?