1. Science & Technology Center. Chestnut Hill Academy - Philadelphia, PA David Klug. Mechanical Option. Advisor - Dr. Freihaut April 15 th, 2009 Architectural Engineering Senior Thesis

2. Presentation Outline Background Information i.Project Summary ii.Existing Conditions Breadth Topics i.Acoustics ii.Daylighting Depth Topics i.Dedicated Outdoor Air ii.Active Chilled Beams iii.Thermal Energy Storage Conclusions

3. ≈30,000 SF $9.6 Million Krieger & Associates Bruce E. Brooks & Associates Existing Conditions

4. Original HVAC Design VAV System 57.1 ton air chilled scroll chiller AHU-1 -> 6,300 CFM AHU-2 -> 8,000 CFM Energy Use Component Site EnergySource Energy (kBTU)(kBTU/ft 2 )(kBTU)(kBTU/ft 2 ) Total2,538,758111.5847,287,498344.036 CO 2 Emissions Source Energy lbs3,500,295 lbs/ft 2 166

5. Existing Conditions Equipment Costs Annual Cost ($/yr) Annual Cost ($/ft 2 ) HVAC Components Sub-Total16,7120.735 Non-HVAC Components Sub-Total36,1561.589 Total52,8682.324 Total Cost ($) Cost ($/ft 2 ) Fire Protection 90,3003.97 HVAC 1,196,70052.57 Total 1,287,00056.53 Operating Costs

6. Acoustical Breadth Reverberation Times T 60 @ 125T 60 @ 250T 60 @ 500T 60 @ 1000T 60 @ 2000T 60 @ 4000 Lobby0.4600.4640.5560.5090.4230.436 Room 1070.4190.4570.5790.5430.4440.472 Room 1090.4150.4590.5840.5360.4390.469 Room 1110.4480.4740.6000.5590.4530.484 Room 1150.4150.4550.5750.5300.4330.463 Room 2030.3040.3900.5020.4450.3640.387 Room 2040.3740.4170.4710.4100.3670.386 Room 2060.4510.4710.5910.5430.4470.481 Room 2080.4530.4700.5880.5410.4460.480 Room 2110.4660.4710.5840.5410.4480.483 1st Floor Corridor0.5960.5360.6750.6220.5060.552 2nd Floor Corridor0.6280.5530.6940.6300.5130.563

7. Acoustical Breadth STC Ratings STC Rating Exterior Walls Masonary58 Stucco57 Glass34 Windows34 Interior Partitions Hallway50 Classrooms44 Robotics Workshop44 Doors27 Exterior Sounds i.Inn Building ii.Track and Field iii.Willow Grove Avenue

8. Daylight Breadth Daylight System –Dual Room miniZ TM –Occupancy Sensors Re-Design –Orientation –Light Shelves North

9. Alternative HVAC Design Dedicated Outdoor Air Active Chilled Beams Humidity Control Energy Consumption Thermal Energy Storage Ice Storage Component Site EnergySource Energy (kBTU)(kBTU/ft 2 )(kBTU)(kBTU/ft 2 ) Total3,043,756148.646,494,375317.15 Peak Cooling Load79 Tons Cooling Requirement663 Ton-hours CO 2 Emissions Source Energy lbs3,119,346 lbs/ft 2 152

10. Alternative HVAC Design Equipment Costs System CostsCost ($) Original Cost1,287,000 Subtracted Equipment760,500 New Equipment706,224 Total1,232,724 Operating CostCost ($/year) Original Operating Cost52,868 ACB Operating Cost+19,730 TES Operating Cost-5,533 Total67,065 Operating Costs

11. Conclusions Acoustics i.Reverberation times good ii.STC ratings good iii.No excessive exterior sound Daylighting i.Justified HVAC Re-Design i.More energy ii.Higher operating costs