1. Harley-Davidson Museum
Milwaukee, WI.
Jonathan Rumbaugh, BAE/MAE
Mechanical Option
Advisor: Dr. William Bahnfleth

2. Project Sponsors

3. Presentation Outline Project Background Existing Conditions
Thesis Goals
Depth One
Thermal Bridging
Depth Two
Heat Rejection
Cooling Tower
River Water
Depth Three
CHP Feasibility
Conclusions

4. Building Statistics Size (Total Square Feet): 130,000
Number Stories Above grade: 3
Construction timeline : April 2005 – May 2008
Overall Project Cost: $75 million

5. Location & Layout N

6. Location & Layout N

7. Location & Layout

8. Location & Layout

9. Location & Layout

10. Mechanical Design
Two Roof Mounted 300 Ton Air-cooled Rotary Screw Chillers
Four 2000 MBH Sealed Combustion Condensing Boilers
Variable Primary Flow
11 Air Handling Units 2 5 4

11. Energy Model

12. Energy Model
$0.10 / kWh Electricity
$0.80 / Therm Natural Gas

13. Emissions
Calculations use factors from the Regional Grid emissions Factors table B-10

14. Emissions
9 Million lbs. of C02e / year
867 acres

15. Comparison

16. Goals Reduce Emissions Reduce Energy Consumption Reduce Operating Cost

17. Proposal Decrease Thermal Loads Through Envelope
Increase Efficiency of Chilled Water Production
Become Energy Independent From Grid

18. Depth One Thermal Bridging

19. Depth One Thermal Bridging

20. Depth One Thermal Bridging
Outside
Inside
Location of thermal break N

21. Depth One Thermal Bridging

22. Depth One Thermal Bridging

23. Depth One Thermal Bridging

24. Depth One Thermal Bridging

25. Depth One Thermal Bridging
8760 hr. study
Total: Watts per year
Lowest indoor temp = 69 oF
Savings: $1, / year [Main gallery]
For a simple payback of 5 years
Each Thermal Break = $653

26. Depth One Thermal Bridging

27. Depth One Thermal Bridging

28. Depth One Thermal Bridging

29. Depth One Thermal Bridging

30. Two 300 Ton Air Cooled Chillers EER 9.4
Depth Two Heat Rejection
Two 300 Ton Air Cooled Chillers
EER 9.4
Carrier

31. Depth Two Heat Rejection
Carrier

32. Two 300 Ton Water Cooled Chillers COP 5.9
Depth Two Heat Rejection
Two 300 Ton Water Cooled Chillers
COP 5.9
EPA

33. Depth Two Heat Rejection

34. Depth Two Heat Rejection
Additional Water: 2, gal
Cost : $5, / year
Capital: -$42,850

35. Depth Two Heat Rejection
30 Year LCC
Existing Air-Cooled System: $4,045,288.09
Alternative 2; Water-Cooled System: $3,861,471.04
Savings: $183,817.05

36. Depth Two Heat Rejection
Supply
Return

37. Depth Two Heat Rejection

38. Depth Two Heat Rejection
Cold Water Temp = 0.739*WB

39. Depth Two Heat Rejection

40. Depth Two Heat Rejection

41. Depth Two Heat Rejection

42. Depth Two Heat Rejection
Capital: +$104,255

43. Depth Two Heat Rejection
Simple Payback: years
Discount payback : years
30 Year LCC
Alternative 2; Cooling Tower System: $3,861,471.04
Alternative 3; River Water System: $3,641,264.61
Savings: $220,206.43

44. Depth Two Heat Rejection

45. Air-Cooled vs. Water-Cooled with River Water
Depth Two Heat Rejection
Air-Cooled vs. Water-Cooled with River Water
Capital cost increased 10% [$61,400.00]
Annual operating cost reduced by 14% [$21,732.00]
30 year LCC reduced 10% [$389,986.00]
Simple payback 3 years

46. Depth Three CHP Feasibility

47. Electric Cost: $0.10/kWh = $29.30/MMBTU
Depth Three CHP Feasibility
Spark Gap
Electric Cost: $0.10/kWh = $29.30/MMBTU
Gas Cost: : $0.80/therm = $8.00/MMBTU
1 : 3.7 Ratio , 1 : 4 [rule of thumb]

48. Depth ThreeCHP Feasibility
Thermal-to-Electric Ratio = 0.74
Recommended: 373 kWe Gas Engine

49. Conclusions Depth Three CHP Feasibility Additional Cost $564,000
Generation Cost $0.088 /kWh
1.2 cents less than purchased
Total Savings: $140,000 /year
Simple Payback: 4.04 Years
CO2 reduction of 62%

50. + + = = Total $160,000 Annually 4 Year Payback 65% Reduction of CO2
Recommendations + +
Total
$160,000 Annually
4 Year Payback
65% Reduction of CO2 = =

51. Questions?

52. Depth One Thermal Bridging
Member
Force
Allowable
Actual
OK?
Beam
Bending Moment
64.12 ft kips
18.5 ft kips
Yes
Shear
79.1 kips
3.7 kips
Girder
3723 ft kips
686 ft kips
886 kips
40.05 kips
Live Load Deflection
3.4”
2.75”
Total Deflection
6.85”
6.6”
Column
Load
355 kips
50 kips
Thermal Break
13,400 psi
2.24 psi