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The Bond Street Wharf

The Bond Street Wharf. Baltimore, Maryland. April 17, 2003 Consultant – Mr. Freihaut. Presentation Outline. Existing Conditions Mechanical Existing Conditions Mechanical Redesign Electrical Breadth Structural Breadth Costs Conclusion/Recommendations Acknowledgements Questions.

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The Bond Street Wharf

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  1. The Bond Street Wharf Baltimore,Maryland April 17, 2003 Consultant – Mr. Freihaut Timothy R. Nolan

  2. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  3. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  4. Background • 6 – Stories, Multi-use Building • 216,000 Total square feet – 12,300 square feet of retail Timothy R. Nolan

  5. Location Timothy R. Nolan

  6. Project Team Owner:Bond Street Wharf Architect: RTKL Inc. Structural Engineers: RTKL Inc. MEPT Engineers: RTKL Inc. Civil Engineers: STV Inc. Interior/Graphic Designers: RTKL Inc. Landscape Architects: Mahan Rykiel Associates Prime Contractor: Struever Bros. Eccles & Rouse Timothy R. Nolan

  7. Architecture • Modeled after the Terminal Warehouse • Typical red brick façade • Long and narrow • Waterfront promenade, terrace on the roof and boat dock Timothy R. Nolan

  8. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  9. Mechanical System • 13” Tall raised floor system with electric reheat around the perimeter • Removable floor panels with occupant controlled diffusers Timothy R. Nolan

  10. Condenser Water Loop (Source) Timothy R. Nolan

  11. Condenser Water Loop (Load) Timothy R. Nolan

  12. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  13. About Heat Pumps • Use earth/water as a heat sink in the summer and a heat source in the winter • Summer - Take heat from the building and discharge into the ground/water • Winter – Transfer heat from the ground/water to the building • Five types of installation: Ground (Vertical and Horizontal), Ground Water (Open and Closed) and Surface Water Timothy R. Nolan

  14. Benefits • Low energy costs – 25% to 50% than conventional systems • Low maintenance cost • Design flexibility • Aesthetics Timothy R. Nolan

  15. Heat Pump Criteria • Is the body of water deep enough? • What are the summer and winter water temperatures? • Is there enough water area for the coils? • Does the surface of the water freeze? Timothy R. Nolan

  16. Chesapeake Bay Conditions • 25 Feet deep • Plenty of room for Coils • Average Bay temperatures July – 80 oF Winter – 40 oF Timothy R. Nolan

  17. Load Calculations • Carrier E20-II HAP 4.10 • Design conditions of .4% • Max cooling load occurs at July 1500 Timothy R. Nolan

  18. Heat Pump Sizing • No < 95% to no > 125% sensible cooling load Timothy R. Nolan

  19. Coil Sizing • Summer Approach = 10 oF • Winter Approach = -5 oF LC= August Ft/Ton x Total Building Sensible Cooling (Btu/Hr) / 12,000 Btu/Hr/Ton LH= Winter Ft/Ton x Total Building Heating (Btu/Hr) / 12,000 Btu/Hr/Ton Q = 3 Gpm/Ton x Total Building Sensible Cooling (Btu/Hr) / 12,000 Btu/Hr/Ton 280 Feet/Ton 310 Feet/Ton Timothy R. Nolan

  20. Coil Layout • 500 Feet/Bundle • Total Length / 500 Ft/Bundle = 259 Bundles • Total Gpm / Number of Bundles = 5.35 Gpm/Bundle 17 Run outs of 8 Coils 13 Run outs of 8 Coils and 3 Run outs of 9 Coils Timothy R. Nolan

  21. Coil Layout Typical Pipe Connection Elevation View of Coils Timothy R. Nolan

  22. Heat Pump Layout 3-D view of Pipe Diagram (Cooling Mode) Heat Pump Clearance Timothy R. Nolan

  23. Controls • Differential pressure sensor near the furthest heat pump • DP sensor connects to a variable speed pump control system that controls the pumps. Timothy R. Nolan

  24. Removal of Equipment • 2 – Cooling towers • 2 – Heat exchangers • 3 – Pumps • Pipe associated with equipment Timothy R. Nolan

  25. Cost • RS Means Mechanical Cost Data 2003 • Heat Pump - $711,180 • Fittings, Pipe and Pump - $218,932 Total Cost = $930,112 • Cooling towers - $84,200 • Heat exchangers - $70,668 • Pumps - $91,170 • Pipe and fittings - $207,743 Total Savings = $454,401 Cost Difference = $ 475,711 Timothy R. Nolan

  26. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  27. Objective • To resize the Motor Control Center • Resize the feeder to the MCC • Calculate the savings from the resizing and wires to the removed equipment Timothy R. Nolan

  28. Electrical Conditions Existing • MCC - 1000 Amps • Feeder - 3 sets of 4 #400 MCM • Wires to Equipment • New • MCC - 300 Amps • Feeder - 3 sets of 4 3/0 THW Timothy R. Nolan

  29. Electrical Cost Timothy R. Nolan

  30. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  31. Existing Structural Frame • 4’-2” Elevation Timothy R. Nolan

  32. Frame Redesign • Cooling Tower weight is 10,000lbs • Dimensions – 8.5’ x 10’ • Beam must remain at 20’ Timothy R. Nolan

  33. Beam Design From the LRFD Manual W8x18 Timothy R. Nolan

  34. Structural Costs Savings • Original Cost - $4,900 • New Cost - $1,192 • Cost Savings -$3,708 Timothy R. Nolan

  35. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  36. Heat Pump Costs/Savings • Mechanical Savings -$454,401 • Electrical Savings - $404,453 • Structural Savings - $3,708 Total Savings - $862,562 • Heat Pump Costs - $711,180 • Fittings, Pipe and other materials - $218,932 Total Costs - $930,112 Cost Difference = $67,550 Timothy R. Nolan

  37. Payback Period • Data was taken from Existing Buildings with Heat Pump. Payback Period = 3.4 years Timothy R. Nolan

  38. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  39. Conclusion/Recommendations • Higher Initial Cost of $67,550 • Payback Period of 3.4 years • Install Heat Pump system instead of condenser water loop • Integrate Heat Pumps system early in design Timothy R. Nolan

  40. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  41. Acknowledgements RTKL Inc. Dr. Freihaut – Mechanical Consultant Jay Sekel – Structural Consultant Family – Mom and Brother Girlfriend – Loan AE Faculty Sharon Williams – Backbone of AE Jonathan Partner in Crime – Kevin Angle AE Students Roommates – Courtney, Courtney 2, Erin The Big Man’s Club Timothy R. Nolan

  42. Presentation Outline • Existing Conditions • Mechanical Existing Conditions • Mechanical Redesign • Electrical Breadth • Structural Breadth • Costs • Conclusion/Recommendations • Acknowledgements • Questions Timothy R. Nolan

  43. Questions? Timothy R. Nolan

  44. Motor Full Load Current – NEC 430-150 • NEC 430-22: Conductor Must be Sized for 125% of FLC • Conductors – NEC 310-16 • Conduit – NEC Table C1 • NEC Table 1 Ch. 9: Only 40% of Conduit to be Filled • Circuit Breakers – NEC 440-22 Timothy R. Nolan

  45. Timothy Nolan The Bond Street Wharf Mechanical Timothy R. Nolan

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