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CERT UPDATE TO GUILFORD COUNTY ENERGY AUDITS OF BELLE MEADE BUILDING BB&T BUILDING HIGH POINT COURTHOUSE & DETENTION CENTER HIGH POINT PUBLIC HEALTH BUILDING.

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Presentation on theme: "CERT UPDATE TO GUILFORD COUNTY ENERGY AUDITS OF BELLE MEADE BUILDING BB&T BUILDING HIGH POINT COURTHOUSE & DETENTION CENTER HIGH POINT PUBLIC HEALTH BUILDING."— Presentation transcript:

1 CERT UPDATE TO GUILFORD COUNTY ENERGY AUDITS OF BELLE MEADE BUILDING BB&T BUILDING HIGH POINT COURTHOUSE & DETENTION CENTER HIGH POINT PUBLIC HEALTH BUILDING APRIL 7, 2009

2 WORK TO DATE GATHERED ENERGY USE DATA REVIEWED EXISTING BUILDING CONDITIONS IDENTIFIED AND ANALYZED SEVERAL ENERGY CONSERVATION MEASURES

3 NORTH ELEVATION GREENSBORO MENTAL HEALTH BUILDING Building location Greensboro Built year 1991 Total Area 99,935 ft 2 SOUTHEAST CORNER In terms of operations the building is divided into three section: –Main building: 87,421ft 2; 12hr/6 days/week –Computer: 6030ft 2 ; 24hr/7days/week –North Wing : 6030ft 2 ; 24hr/7days/week Each sector has its own AC which runs 24hr/7days/week

4 Energy Source Amount Consumed (BTU) Cost ($) Electricity9,966,588,480149, Natural gas1,882,800,00025, Energy Cost Index =$1.75/ft 2 /year Energy Use Index =118.57/kBTU/ft 2 /year ANNUAL ENERGY CONSUMPTION 2008

5 RETROFIT SAVINGS OPTIONS Fixture Type# of Fixtures# of Lamps/Fixture A5673-T12 40 watt B1612-T12 40 watt C832-T12 40 watt COMMON LIGHTING FIXTURES Current Practice: T12, 40 watt, magnetic ballast; 3 different fixtures: A, B, and C Recommended: T8 32 watts; Electronic ballast OPTION 1: REPLACE EXISTING LAMP WITH ENERGY EFFICIENT LAMP Implementation Cost Fixture type A = $49.00/fixture Fixture types B & C =$32.00/fixture Total implementation cost = $35, Simple payback period = 4.5 years Dollar Savings from Lamp Type A, B, & C =$7,867/yr

6 RETROFIT SAVINGS FROM HVAC Option 2B: Changing from Fixed to Variable Frequency Drive Estimated Savings: $ 4,335/year Estimated Cost: $ 10,500 Simple payback period: 2.4 years This analysis assumed that the City will provide their own labor. Option 2A: Turn of Main Building AC from 10:00pm to 6:00am Weekends & Holidays Estimated Savings: $ 12,315/year Estimated Cost: $ 0.00 Simple payback period: Immediate payback This analysis assumed that the City will provide their own labor.

7 Current practice: The fan is being driven by 75 hp motor, efficiency of Recommended: Replace the 75 hp motor with efficient motor of efficiency Assume an average load factor (LF) of 0.8, operate for 8,760hrs/year Estimated Savings: $983/year Estimated Cost: $4,505 Simple payback period: 4.6years This analysis assumed that the City will provide their own labor. OPtion2C: Replace the Existing Motor with Energy Efficient Motor

8 SAVINGS FROM RESET CHILLED WATER TEMPERATURE Option 3: R eset Chilled Water Temperature Estimated Savings: $ 2,937/year Estimated Cost: $ 3,000 Simple payback period: 1 year This analysis assumed that the City will provide their own labor.

9 Conservation Measure Cost Savings(KWh)/yr Savings/yr Replacing T12 with T8 Lamps $ 35,737131,117$ 7,867 *Replacing 75 hp motor with energy efficient motor $ 4,505*16,383*$ 983* *Using VFD for 75hp motor instead of fixed drive $ 10,500*72250*$ 4,335* Shutting AC unit for the Main building from 10pm- 6pm and weekends $ 12,315 Reset Chiller water temperature $ 3,00048,950$ 2,937 Total38,737385,317 $ 23,119 Percentage Savings per year = 13% SUMMARY

10 GREENSBORO BB&T BUILDING Building location Greensboro Built year 1973 Total Area 64,301 ft 2 Energy SourceCost ($) Electricity$95,000 Natural gas$43,000 Energy Cost Index =$2.15/ft 2 /year

11 Estimated Savings: $ 10,884/year Estimated Cost:$ 58,140 Simple payback period: 5.3 years FloorTotal Number of bulbs Fixtures Basement First Second Third Forth Total32301,473 OPTION 1: REPLACE EXISTING LAMP WITH ENERGY EFFICIENT LAMP RETROFIT SAVINGS OPTIONS

12 Option2: Reset chilled water temperature Estimated Savings: $ 2,670/year Estimated Cost: $ 3,000 Simple payback period: 1.2 years Option 3:Reset Hot water temperature Estimated savings: $750 Estimated cost: $3,000 Estimated pay back: 4 years RETROFIT SAVINGS FROM HVAC

13 Conservation Measure CostSavings (KWh)/yr Dollar Savings/yr Replacing T12 with T8 Lamps $58,140181,400$ 10,884 Reset Chiller water temperature $ 3,00044,500$ 2,670 Reset Hot water temperature $ 3,00015,500$ 750 Total$67,140241,400$14,304 SUMMARY Percentage Savings per year = 8%

14 HIGH POINT COURTHOUSE & JAIL BUILDING High-Point Courthouse Front View Building location High Point Built year 1988 Total Area 227,044 ft 2 Annual Energy use 21,454MBTU Annual Energy Cost $346, Building Energy and Cost Index 94.5 kBTU/SF/YR 1.5 $/kBTU/SF/YR

15 RETROFITSAVINGS OPTIONS Option 1: Replace the Existing Lamp with T8 25 watt Estimated Savings: $ 29,534 Estimated Cost: $ 142,528 Simple payback period: 4.8 years This analysis assumed that the City will provide their own labor. Replacing T12, 34 watt fluorescence tubes with T8 25 watt and electronic ballast: Number of fixtures in Detention Center = 780; burning continuously throughout the year Number of fixtures in Courthouse = 1316; burning 12 hour/day and 5days a week Option 2A: Repair/Replace controls in Courthouse Estimated Savings: $ 19,825/yr Estimated Cost: $ 129,600 Simple payback period: 6.5 years

16 Option 2B: Repair/Replace Controls in Detention Center Estimated Savings: $ 4,637/yr Estimated Cost: $ 204,750 Simple payback period: 44.2years Option 2C: Add VFD to AHUs in the Courthouse Estimated Savings: $ 12,253 Estimated Cost: $ 60,000/yr Simple payback period: 4.9 years RETROFITSAVINGS FROM HVAC

17 Option 2E: Install Water Side Economizer Estimated Savings: $ Estimated Cost: $ 35,000 Simple payback period: years Option2D: ReplaceVAV with Terminal Reheat in Courthouse with FPVAV Estimated Savings: $ 4,749 Estimated Cost: $ 160,000 Simple payback period: 33.7 years

18 *Option3 Installing Solar Panel in the Detention Center Estimated Savings: $ 65% efficiency Estimated Cost: $250,000 and $300,000 *** Simple payback period: 19.5years This system will offset 50 tons of CO2 per year. Option2F : HVAC Re-Commissioning Estimated Savings: $1,413 Estimated Cost: $60,000.00(DC)/ $82,500.00(CH) Simple payback period: years

19 Conservation MeasureCostSavings (kWh)/yr Dollar Savings/yr 1. Replace Existing Lamps142, ,534 2A. Repair/Replace Controls in Courthouse129, ,825 2B. Repair/Replace Controls in Detention Center204, ,637 2C. Add VAV to AHUs60, ,253 2D Replace VAV with FPVAV160, ,749 2E Install Water Side Economizer35,00033,333-50, F Re-commissioning HVAC 60,000(DC) 82,500(CH)235501,413 SUMMARY

20 Building location High Point Built year 1990 Total Area 34,446 ft 2 HIGH POINT PUBLIC HEALTH BUILDING Building Energy and Cost Index kBTU/SF/YR $3.32/kBTU/SF/YR

21 Option 1: Replace T12, 34 watt fluorescence tubes with T8 25 watt and electronic ballast: Estimated Savings: $ 5,647.00/year Estimated Cost: $ 21, Simple payback period: 4.0 years Option 2: Reset Chilled Water from Outside Air Estimated Savings: $ /year Estimated Cost: $ 3, Simple payback period: 2.1years This analysis assumed that the City will provide their own labor SAVINGS FROM RETROFIT

22 Repair and Use the Existing Solar Water Heaters Estimated Savings: $ 983/year Estimated Cost: $ Simple payback period: 4.6years This analysis assumed that the City will provide their own labor SAVINGS FROM RETROFIT Conservation MeasureCost Savings (kWh)/yr Dollar Savings/yr 1. Replace Existing Lamps21, , Reset Chilled Water from OA Repair and Used the Existing Solar Thermal System4, SUMMARY

23 NEXT STEPS COMPLETE FINAL REVIEW OF IDENTIFIED MEASURES SELECT MEASURES TO BE IMPLEMENTED IDENTIFY FUNDING SOURCES OBTAIN DESIGN ASSISTANCE WHERE NEEDED TO IMPLEMENT MEASURES


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