thesis final presentation - pennsylvania state university...mechanical redesign results – first...
TRANSCRIPT
Thesis Final Presentation
Presentation Outline
• Project Team• Project Background• Redesign Goals• Mechanical Redesign• Conclusions• Questions
Project Team• General Contractor and CM – Whiting Turner• Architect – Hugh Newell Jacobsen• Landscape Architect – P.E.L.A. Design• Mechanical, Electrical, Plumbing, and Fire Protection
Engineers – EBL Engineers• Civil Engineer – A. Morton Thomas & Associates• Structural Engineer – McMullan & Associates• Owner – The University of Maryland• User – The University of Maryland Alumni
Association
Project Background
• Admin Building• Alumni Hall
Project Background
• Admin Building• Alumni Hall
Project Background
Admin Building• AHU-1 Zones• AHU-2 Zones• AHU-3 Zones• AHU-4 Zones
Project Background
Admin Building• AHU-1 Zones• AHU-2 Zones• AHU-3 Zones• AHU-4 Zones
Project Background
Admin Building• AHU-1 Zones• AHU-2 Zones• AHU-3 Zones• AHU-4 Zones
Project Background
Admin Building• AHU-1 Zones• AHU-2 Zones• AHU-3 Zones• AHU-4 Zones
Project Background
• Admin Building• Alumni Hall
Project Background
Alumni Hall• Alumni Hall• Hall of Fame• MD Room• Reception Area
Project Background
Alumni Hall• Alumni Hall• Hall of Fame• MD Room• Reception Area
Project Background
Alumni Hall• Alumni Hall• Hall of Fame• MD Room• Reception Area
Project Background
Alumni Hall• Alumni Hall• Hall of Fame• MD Room• Reception Area
Project Background
• Self-Contained Utility Building (SCUB)• Under-floor Air Distribution• Enthalpy Wheel System
Redesign Goals
• Mechanical– Dedicated Outdoor Air System– Low Temperature Chilled Water– Low Temperature Supply Air
• Electrical– Resize for New Mechanical Equipment
• Structural– Resize for New Mechanical Equipment
• Overall– Lower First Cost– Reduce Energy Consumption– Improve Thermal Comfort
Mechanical Redesign
Dedicated Outdoor Air System (DOAS)• FanCoil Units• Radiant Panels• Free Cooling, Cooling Tower• Enthalpy Wheel w/ Variable Air Volume System
Mechanical RedesignResults – Annual Costs
16,724162,74610,66320,3651,7335,926113,71710,342Enthalpy Wheel
3,528175,94210,34219,7541,8066,553133,6323,855DOAS_Radiant
(12,435)191,90510,28519,6441,8015,929145,1088,838DOAS-FanCoil
0179,47010,50820,0691,7126,748132,9727,461Original
$/yr$/yr$/yr$/yr$/yr$/yr$/yr$/yr
Total SavingsTotalElectrical EquipmentLightsPumpsHeatingCooling Air System Fans
-
50,000
100,000
150,000
200,000
250,000
Original DOAS-FanCoil DOAS-Radiant EnthalpyWheel
$/yr
Electric Equipment Lights Pumps Heating Air System Fans Cooling
Mechanical RedesignResults – First Costs
40,21993,76551,87941,887Enthalpy Wheel
174,723288,2691971150,04743,14133,109DOAS_Radiant
105,387158,93383,62946,81628,488DOAS-FanCoil
53,54653,564Original
$$$$$$$
AdditionalTotalCooling TowerPanelsFanCoil UnitsEnthalpy WheelsAir Handling Units
-
50,000
100,000
150,000
200,000
250,000
Original DOAS-FanCoil DOAS-Radiant EnthalpyWheel
$
AHU's EW's FCU's Panels CT
Mechanical RedesignResults – First Costs
40,219112,08318,31851,87941,887Enthalpy Wheel
249,105320,9691971150,04732,70043,14133,109DOAS_Radiant
87,069158,93383,62946,81628,488DOAS-FanCoil
71,86418,31853,564Original
$$$$$$$
AdditionalTotalCooling TowerPanelsFanCoil UnitsEnthalpy WheelsAir Handling Units
0
50000
100000
150000
200000
250000
300000
350000
$
Original DOAS-FanCoil
DOAS-Radiant
EnthalpyWheel
Mechanical Redesign
Results – Payback Comparison
240,21916,724Enthalpy Wheel
50174,7233,529DOAS_Radiant
Loss105,387(12,435)DOAS-FanCoil
N/A00Original
yr$$/yr
PaybackAdditional First CostAnnual Savings
Mechanical Redesign
Low Temperature Chilled Water• Utilize SCUB• Low Temperature Supply Air• Results
Mechanical RedesignResults – Annual Costs
(59,591)239,06110,39319,8511,61214,774184,4877,944Low Temperature Supply Air
3,660175,81010,50820,0691,7126,748129,3123,801Low Temperature Chilled Water
0179,47010,50820,0691,7126,748132,9727,461Original
$/yr$/yr$/yr$/yr$/yr$/yr$/yr$/yr
Total SavingsTotalElectrical EquipmentLightsPumpsHeatingCooling Air System Fans
-
50,000
100,000
150,000
200,000
250,000
300,000
Original LowTempCW LowTempSA
$/yr
Electric Equipment Lights Pumps Heating Air System Fans Cooling
Mechanical Redesign
Results – Payback Comparison
Loss1,559(59,591)Low Temperature Supply Air
003,660Low Temperature Chilled Water
N/A00Original
yr$$/yr
PaybackAdditional First CostAnnual Savings
Mechanical RedesignOptimal System
Results – Annual Costs
19,758159,71210,66420,3661,7335,926114,4416,582Optimal
16,724162,74610,66320,3651,7335,926113,71710,342Enthalpy Wheel
3,660175,81010,50820,0691,7126,748132,9723,801Low Temperature Chilled Water
0179,47010,50820,0691,7126,748132,9727,461Original
$/yr$/yr$/yr$/yr$/yr$/yr$/yr$/yr
Total SavingsTotalElectrical EquipmentLightsPumpsHeatingCooling Air System Fans
-20,00040,00060,00080,000
100,000120,000140,000160,000180,000200,000
Original LowTempCW EnthalpyWheel Best
$/yr
Electric Equipment Lights Pumps Heating Air System Fans Cooling
Mechanical RedesignOptimal System
Results – Payback Comparison
2.140,44019,758Optimal
2.440,21916,724Enthalpy Wheel
003,660Low Temperature Chilled Water
N/A00Original
yr$$/yr
PaybackAdditional First CostAnnual Savings
Conclusions
• Enthalpy Wheels with VAV System and Low Temperature Chilled Water
• Additional First Cost $40,440• Annual Savings $19,758• Payback = 2.1 years
Questions?
Bonus RoundsElectrical Redesign – Sizing Circuit Breakers
Bonus RoundsElectrical Redesign – Sizing Panelboard
PP5B and Transformer TR-5
Bonus RoundsElectrical Redesign – Resized Panelboards and
Transformers for the Optimal System
(112.5)(73)(45)TR-7
(45)(36)(15)TR-5
400353200PP7B
225222225PP7A
1007650PP5B
150125250PP5A
A (kVA)A (kVA)A (kVA)
New SizeLoadOriginal Size
Bonus RoundsStructural Redesign