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Commercial Case 2
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Regular annual Purchased Energy Use |
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Costs($) average US 11$ per MMBtu |
Electricity and Natural Gas 98,800 |
1,086,800 |
(3412 BTUs = 1 kWh) 28,823,529 kWh |
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| Regular purchased Energy Use (5 years period) |
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Electricity and Natural Gas 494,000 |
5,434,000 |
Comparison with DSS System |
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System |
Price($) |
1 TERAWATT 3.5 MW |
5,000,000 |
| + annual maintenance costs (5% of purchase price) |
| This DSS System would have a payback period of only 5 years (due to eliminated electricity and natural gas costs). |
| No fuel costs for the entire lifetime operation |
| Additional maintenance costs |
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| Oak Ridge National Laboratory East Campus
Commercial Office
Moderator Group: Research DSS LA
376,000 sq. feet (34,900 sq. meters)
Project scope: 4 3-story buildings
Typically occupied by 760 people, 40 hours per person per week; and 300 visitors per week, 8 hours per visitor per week
average consumption: 3,290 kW |
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Indoor Spaces:
Office (55%), Laboratory (30%), Data processing (10%), Conference (4%), Public assembly (2%), Restrooms (2%), Mechanical systems (2%), Electrical systems (1%)
Outdoor Spaces:
Garden—decorative, Pedestrian/non-motorized vehicle path, Patio/hardscape, Shade structures/outdoor rooms
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