Mechanical EmphasisTimothy R. Nolan Baltimore, Maryland April 17, 2003 Consultant – Mr. Freihaut

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

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

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

Mechanical EmphasisTimothy R. Nolan Location

Mechanical EmphasisTimothy R. Nolan 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

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

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

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

Mechanical EmphasisTimothy R. Nolan Condenser Water Loop (Source)

Mechanical EmphasisTimothy R. Nolan Condenser Water Loop (Load)

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

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

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

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

Mechanical EmphasisTimothy R. Nolan Chesapeake Bay Conditions 25 Feet deep 25 Feet deep Plenty of room for Coils Plenty of room for Coils Average Bay temperatures Average Bay temperatures July – 80 o F Winter – 40 o F

Mechanical EmphasisTimothy R. Nolan Load Calculations Carrier E20-II HAP 4.10 Carrier E20-II HAP 4.10 Design conditions of.4% Design conditions of.4% Max cooling load occurs at July 1500 Max cooling load occurs at July 1500 Cooling (Summer)Heating (Winter) IndoorOutdoorIndoorOutdoor F93 F DB70-74 F 31 F % RH78 F WB20-30 % RH

Mechanical EmphasisTimothy R. Nolan Heat Pump Sizing No 125% sensible cooling load No 125% sensible cooling load

Mechanical EmphasisTimothy R. Nolan Coil Sizing Summer Approach = 10 o F Summer Approach = 10 o F Winter Approach = -5 o F Winter Approach = -5 o F 280 Feet/Ton 310 Feet/Ton 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

Mechanical EmphasisTimothy R. Nolan Coil Layout 500 Feet/Bundle 500 Feet/Bundle Total Length / 500 Ft/Bundle = 259 Bundles Total Length / 500 Ft/Bundle = 259 Bundles Total Gpm / Number of Bundles = 5.35 Gpm/Bundle 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

Mechanical EmphasisTimothy R. Nolan Coil Layout Typical Pipe Connection Elevation View of Coils

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

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

Mechanical EmphasisTimothy R. Nolan Removal of Equipment 2 – Cooling towers 2 – Cooling towers 2 – Heat exchangers 2 – Heat exchangers 3 – Pumps 3 – Pumps Pipe associated with equipment Pipe associated with equipment

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

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

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

Mechanical EmphasisTimothy R. Nolan Electrical Conditions Existing Existing MCC Amps MCC Amps Feeder - 3 sets of 4 #400 MCM Feeder - 3 sets of 4 #400 MCM Wires to Equipment Wires to Equipment New New MCC Amps MCC Amps Feeder - 3 sets of 4 3/0 THW Feeder - 3 sets of 4 3/0 THW

Mechanical EmphasisTimothy R. Nolan Electrical Cost Name ConductorConduit Total Type Length$/Length Type Length$/Length P3#4120$ "40$2.90$14,876 P4#4156$ "52$2.90$19,339 P5#4192$ "64$2.90$23,802 CT-1#6330$92.503/4"90$2.15$30,719 CT-2#6360$92.503/4"100$2.15$33,515 CT-1-HEATER-1#12330$45.503/4"90$2.15$15,209 CT-1-HEATER-2#12330$45.503/4"90$2.15$15,209 CT-2-HEATER-1#12360$45.503/4"100$2.15$16,595 CT-2-HEATER-2#12360$45.503/4"100$2.15$16,595 $185,857

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

Mechanical EmphasisTimothy R. Nolan Existing Structural Frame 4’-2” Elevation 4’-2” Elevation

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

Mechanical EmphasisTimothy R. Nolan Beam Design From the LRFD Manual W8x18

Mechanical EmphasisTimothy R. Nolan Structural Costs Savings Original Cost - $4,900 Original Cost - $4,900 New Cost - $1,192 New Cost - $1,192 Cost Savings - $3,708 Cost Savings - $3,708

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

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

Mechanical EmphasisTimothy R. Nolan Payback Period Data was taken from Existing Buildings with Heat Pump. Data was taken from Existing Buildings with Heat Pump. Payback Period = 3.4 years

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

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

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

Mechanical EmphasisTimothy R. Nolan 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

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

Mechanical EmphasisTimothy R. Nolan Questions?

Mechanical EmphasisTimothy R. Nolan Motor Full Load Current – NEC NEC : Conductor Must be Sized for 125% of FLC Conductors – NEC Conduit – NEC Table C1 NEC Table 1 Ch. 9: Only 40% of Conduit to be Filled Circuit Breakers – NEC

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