Geothermal - Fort Knox
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Geothermal - Fort Knox

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Geothermal - Fort Knox Geothermal - Fort Knox Presentation Transcript

  • Fort KnoxBuilding 1110 Case Study
  • 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
  • Results of Systems Upgrades•Improved energy efficiency –Building 1110 received the Energy Star Award in 2008 –Energy density was reduced 76% after complete renovation to energy standards•Improved indoor air quality•Sustainable buildingperformance•Eliminated natural gas forspace and domestic waterheating•Smaller carbon footprint
  • Building 1110 – 2006 BTU SummaryDate Electricity Natural Gas Totals Blended Electric Gas MMBTU Cost ofMonth Kwh Total Cost $/kwh MMBTU Therms Gas 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 $ 0.030 236 6,600 $ 7,688.44 $ 1.17 660 896 $ 9,775.36May 106,560 $ 4,161.19 $ 0.039 364 3,307 $ 2,889.60 $ 0.87 331 694 $ 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 $ 4,069.64Aug 78,960 $ 5,615.71 $ 0.071 269 745 $ 650.68 $ 0.87 74 344 $ 6,266.39Sep 39,600 $ 3,642.62 $ 0.092 135 2,852 $ 2,492.22 $ 0.87 285 420 $ 6,134.84 Oct 38,160 $ 2,744.62 $ 0.072 130 9,548 $ 11,123.78 $ 1.17 955 1,085 $ 13,868.40Nov 48,960 $ 2,428.42 $ 0.050 167 11,916 $ 13,882.68 $ 1.17 1,192 1,359 $ 16,311.10Dec 45,120 $ 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 2,410 105,486 $ 120,433.00 10,549 12,958 $ 157,735.52Avg $ 0.053 $ 1.14
  • Building 1110 – 2008 BTU SummaryDate Electricity Natural Gas Totals Blende Electric Gas MMBTU Cost ofMonth Kwh Total Cost d $/kwh MMBTU Therms Gas Cost $/therm MMBTU Total Energy Jan 88,080 $ 4,932.48 $ 0.056 301 - $ - $ - - 301 $ 4,932.48 Feb 89,280 $ 4,999.68 $ 0.056 305 - $ - $ - - 305 $ 4,999.68 Mar 78,960 $ 4,421.76 $ 0.056 269 - $ - $ - - 269 $ 4,421.76 Apr 82,800 $ 4,636.80 $ 0.056 283 - $ - $ - - 283 $ 4,636.80 May 64,320 $ 3,601.92 $ 0.056 220 - $ - $ - - 220 $ 3,601.92 Jun 66,720 $ 3,736.32 $ 0.056 228 - $ - $ - - 228 $ 3,736.32 Jul 69,840 $ 3,911.04 $ 0.056 238 - $ - $ - - 238 $ 3,911.04Aug 79,680 $ 4,462.08 $ 0.056 272 - $ - $ - - 272 $ 4,462.08 Sep 76,560 $ 4,287.36 $ 0.056 261 - $ - $ - - 261 $ 4,287.36 Oct 70,560 $ 4,184.21 $ 0.059 241 - $ - $ - - 241 $ 4,184.21 Nov 60,720 $ 3,600.00 $ 0.059 207 - $ - $ - - 207 $ 3,600.00 Dec 66,720 $ 3,956.50 $ 0.059 228 - $ - $ - - 228 $ 3,956.50Totals 894,240 $ 50,730.15 3,052 - $ - - 3,052 $ 50,730.15Avg. $ 0.057 $ -
  • Pre and Post Installation Comparisons•2006 Pre- installation average monthly costs, MMBTUutilization, and total energy costs: –Natural Gas Cost: $ 11,327 –Electric Cost: $ 3,026 –MMBTU 2006 Total 12,958 –Total 2006 Energy Cost $157,735•Post-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
  • Building 1110 – Electric Consumption 120,000 110,000 100,000 90,000 80,000 70,000kWh 60,000 50,000 40,000 30,000 20,000 10,000 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • The System
  • Geothermal Heat Pump Systems• 4 Million ft2 of buildings installed for geothermal heating and cooling• 2.5 Million ft2 in planning for next two years• Best life cycle cost system• Serving complex to simple buildings• Pulls constant water temperature from ground below• Allows for energy sharing
  • Geothermal Well Field• Consolidated Well Fields – Provides heating, cooling, and domestic hot water – Maximizes building diversity – Minimizes construction expenses – Minimizes construction interferences
  • Geothermal Domestic Hot Water•Efficient domestic hotwater•Uses the investment ofthe geothermal well field•Minimal installation costsdue to the common wellfield
  • The Unit for Water Heating
  • High Temperature (R134a) 208/230V, or 460V, 3Ph,Capacity at: 380V, 3Ph, 50Hz 60Hz Compressor Water Heating Cooling Water Heating Cooling Model BTUH BTUH BTUH BTUHWW-54 HT 54,000 39,000 48,000 34,000 ScrollWW-96 HT 96,000 69,000 86,000 62,000 ScrollWW-110 HT 110,000 80,000 96,000 70,000 ScrollWW-165 HT 165,000 118,000 144,000 106,000 ScrollWW-190 HT 214,000 154,000 172,000 124,000 ScrollWW-330 HT 314,000 229,000 288,000 212,000 ScrollWW-430 HT 420,000 303,000 364,000 280,000 ScrollWW-820 HT 817,000 653,000 680,000 540,000 ScrewWW-1000HT 1,060,000 830,000 880,000 690,000 Screw
  • Refrigeration Schematic for a WWHP Unit
  • Summary•GSHP – Ground Source Heat Pump technology was selectedfor Fort Knox space heating and cooling•Selecting GSHP technology eliminated natural gas for spaceheating•Converting domestic water heating to electric heat totallyeliminated natural gas needs for the building•At 3.0 COP, HPWH for domestic water heating alternative thebuilding reduced the building water heating costs by 2/3rds•Currently there are 54 Fort Knox buildings with E-Tech HPWHfor domestic water heating
  • Credits•Installation by Harshaw Trane, Louisville, KY•Energy Tables by Harshaw Trane