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HomeMy WebLinkAboutGastineau GSHP Cost Estimate and EvaluationAIRPORT & DPAC GSHP COST INFORMATION DPAC Horizontal Piping 7272 LF DPAC Horizontal Piping Bid Cost 265,517$ DPAC Horizontal Piping Bid Cost/LF 36.51$ /LF Airport Bid Cost/LF of borehole 7.50$ /LF GASTINEAU GEOTHERMAL LOOPFIELD DESIGN ASSUMPTIONS Gastineau School SF 46,000 SF Peak BTUH per SF 28 BTUH/SF Total BTUH Peak Heat Load 1,288,000 BTUH LF Borehole Piping per BTUH 0.02292 LF LF Boreholes required at Gastineau1 29,517 LF Number of 370' boreholes 80 boreholes Estimated length of Horizontal Piping 7,304 LF GASTINEAU GSHP SYSTEM CONSTRUCTION COST ESTIMATE Boreholes2 $221,375 --escalation 7.50%$16,603 --premium for rock drilling 12.00%$26,565 Driller Mobilization2 $170,000 --escalation 7.50%$12,750 Horizontal Piping2 $266,685 --escalation 7.50%$20,001 Site Demolition & Earthwork $92,160 Adder for Heat Pump Infrastructure in Boiler Room3 $73,860 Contingency $45,000 Estimated Construction Cost of Gastineau GSHP System $945,000 GASTINEAU GSHP SYSTEM PROJECT COST Construction Cost of Gastineau GSHP System $945,000 Design $75,600 Test W ells $116,235 Conductance Tests $18,900 CBJ Permits $5,250 CBJ Bidding Services $2,100 Consultant Construction Inspection Services 2%$18,900 CBJ Project Management Services 4%$46,985 Commissioning $10,500 JSD Annual O&M Reporting $10,530 Total Project Cost $1,250,000 Project Capital Cost $1,061,235 Project Development Cost $188,765 PAYBACK INFORMATION Estimated Gastineau Heating Oil Cost4 $63,450 Estimated Annual GSHP Energy Cost4 $26,633 Estimated Annual Energy Savings $36,817 1 Assumes similar heat transfer conductance in soil as Airport 2 Cost based on Spring 2009 bid results for DPAC and Airport Loop Fields 3 Cost of GSHP equipment less cost of oil-fired boiler equipment it replaces 4 Estimated annual heating cost of fully renovated facility meeting current ventilation code Printed: 11/4/2009 Gast GSHP Evaluation Page 1 of 1