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

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

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

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, ,287, CO 2 Emissions Source Energy lbs3,500,295 lbs/ft 2 166

Existing Conditions Equipment Costs Annual Cost ($/yr) Annual Cost ($/ft 2 ) HVAC Components Sub-Total16, Non-HVAC Components Sub-Total36, Total52, Total Cost ($) Cost ($/ft 2 ) Fire Protection 90, HVAC 1,196, Total 1,287, Operating Costs

Acoustical Breadth Reverberation Times T 125T 250T 500T 1000T 2000T 4000 Lobby Room Room Room Room Room Room Room Room Room st Floor Corridor nd Floor Corridor

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

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

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, ,494, Peak Cooling Load79 Tons Cooling Requirement663 Ton-hours CO 2 Emissions Source Energy lbs3,119,346 lbs/ft 2 152

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

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