1. Fort KnoxBuilding 1110 Case Study

2. Fort Knox establishedperformance requirements for allcommon systems on the base.The design began implementationin 2004 and included: HVAC Windows Lighting Roofing Systems Insulation Domestic Hot Water 3. Results of Systems UpgradesImproved energy efficiency Building 1110 received the Energy Star Award in 2008 Energy density was reduced 76% after complete renovation to energy standardsImproved indoor air qualitySustainable buildingperformanceEliminated natural gas forspace and domestic waterheatingSmaller carbon footprint 4. Building 1110 2006 BTU SummaryDateElectricity Natural Gas TotalsBlendedElectric Gas MMBTUCost ofMonthKwhTotal Cost $/kwh MMBTUThermsGas Cost $/therm MMBTU Total Energy Jan 48,480 $ 2,377.82 $ 0.049 165 19,044 $ 22,185.77$ 1.17 1,904 2,070$ 24,563.59 Feb 46,080 $ 2,580.19 $ 0.056 157 18,281 $ 21,297.77$ 1.17 1,828 1,985$ 23,877.96 Mar 52,080 $ 2,011.03 $ 0.039 178 13,736 $ 16,002.87$ 1.17 1,374 1,551$ 18,013.90 Apr 69,120 $ 2,086.92 $ 0.030 2366,600 $7,688.44$ 1.17660 896 $ 9,775.36May 106,560 $ 4,161.19 $ 0.039 3643,307 $2,889.60$ 0.87331 694 $ 7,050.79 Jun 65,760 $ 3,541.44 $ 0.054 224 846$739.01$ 0.87 85 309 $ 4,280.45 Jul 67,200 $ 3,465.55 $ 0.052 229 691$604.09$ 0.87 69 298 $ 4,069.64Aug78,960 $ 5,615.71 $ 0.071 269 745$650.68$ 0.87 74 344 $ 6,266.39Sep39,600 $ 3,642.62 $ 0.092 1352,852 $2,492.22$ 0.87285 420 $ 6,134.84 Oct 38,160 $ 2,744.62 $ 0.072 1309,548 $ 11,123.78$ 1.179551,085$ 13,868.40Nov48,960 $ 2,428.42 $ 0.050 167 11,916 $ 13,882.68$ 1.17 1,192 1,359$ 16,311.10Dec45,120 $ 2,647.01 $ 0.059 154 17,919 $ 20,876.10$ 1.17 1,792 1,946$ 23,523.11Total 706,080 $37,302.52 2,410105,486 $ 120,433.00 10,54912,958$ 157,735.52Avg$ 0.053 $ 1.14 5. Building 1110 2008 BTU SummaryDate Electricity Natural Gas TotalsBlendeElectricGas MMBTU Cost ofMonthKwh Total Cost d $/kwh MMBTUThermsGas Cost $/thermMMBTU TotalEnergy Jan88,080 $ 4,932.48 $ 0.056301 - $- $--301$ 4,932.48 Feb89,280 $ 4,999.68 $ 0.056305 - $- $--305$ 4,999.68 Mar78,960 $ 4,421.76 $ 0.056269 - $- $--269$ 4,421.76 Apr82,800 $ 4,636.80 $ 0.056283 - $- $--283$ 4,636.80 May64,320 $ 3,601.92 $ 0.056220 - $- $--220$ 3,601.92 Jun66,720 $ 3,736.32 $ 0.056228 - $- $--228$ 3,736.32 Jul69,840 $ 3,911.04 $ 0.056238 - $- $--238$ 3,911.04Aug 79,680 $ 4,462.08 $ 0.056272 - $- $--272$ 4,462.08 Sep76,560 $ 4,287.36 $ 0.056261 - $- $--261$ 4,287.36 Oct70,560 $ 4,184.21 $ 0.059241 - $- $--241$ 4,184.21 Nov60,720 $ 3,600.00 $ 0.059207 - $- $--207$ 3,600.00 Dec66,720 $ 3,956.50 $ 0.059228 - $- $--228$ 3,956.50Totals 894,240 $ 50,730.15 3,052 - $- -3,052$ 50,730.15Avg.$ 0.057 $- 6. Pre and Post Installation Comparisons2006 Pre- installation average monthly costs, MMBTUutilization, and total energy costs: Natural Gas Cost: $ 11,327 Electric Cost:$ 3,026 MMBTU 2006 Total12,958 Total 2006 Energy Cost$157,735Post-installation average monthly costs, MMBTUutilization, and total energy costs: Natural Gas Cost: $0 Electric Cost:$4,225 MMBTU 2006 Total 3,052 Total 2006 Energy Cost$ 50,730 7. Building 1110 Electric Consumption120,000110,000100,000 90,000 80,000 70,000kWh60,000 50,000 40,000 30,000 20,000 10,000 0Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 8. The System 9. Geothermal Heat Pump Systems 4 Million ft2 of buildingsinstalled for geothermalheating and cooling 2.5 Million ft2 in planningfor next two years Best life cycle cost system Serving complex to simplebuildings Pulls constant watertemperature from groundbelow Allows for energy sharing 10. Geothermal Well Field Consolidated Well Fields Provides heating, cooling, and domestic hot water Maximizes building diversity Minimizes construction expenses Minimizes construction interferences 11. Geothermal Domestic Hot WaterEfficient domestic hotwaterUses the investment ofthe geothermal well fieldMinimal installation costsdue to the common wellfield 12. The Unit for Water Heating 13. High Temperature (R134a)208/230V, or 460V, 3Ph,Capacity at:380V, 3Ph, 50Hz60HzCompressor Water HeatingCooling Water Heating CoolingModelBTUH BTUHBTUHBTUHWW-54 HT54,00039,000 48,000 34,000ScrollWW-96 HT96,00069,000 86,000 62,000ScrollWW-110 HT 110,000 80,000 96,000 70,000ScrollWW-165 HT165,000118,000 144,000 106,000 ScrollWW-190 HT214,000154,000 172,000 124,000 ScrollWW-330 HT314,000229,000 288,000 212,000 ScrollWW-430 HT420,000303,000 364,000 280,000 ScrollWW-820 HT817,000653,000 680,000 540,000 ScrewWW-1000HT1,060,000830,000 880,000 690,000 Screw 14. Refrigeration Schematic for a WWHP Unit 15. SummaryGSHP Ground Source Heat Pump technology was selectedfor Fort Knox space heating and coolingSelecting GSHP technology eliminated natural gas for spaceheatingConverting domestic water heating to electric heat totallyeliminated natural gas needs for the buildingAt 3.0 COP, HPWH for domestic water heating alternative thebuilding reduced the building water heating costs by 2/3rdsCurrently there are 54 Fort Knox buildings with E-Tech HPWHfor domestic water heating 16. CreditsInstallation by Harshaw Trane, Louisville, KYEnergy Tables by Harshaw Trane