The URL can be used to link to this page

Home My WebLink About2 SUBMITTAL IGIUGIGIGIUGIG Igiugig Wood Boiler Study RBA Job No. LP-02 June 1, 2010 The following buildings were considered as potential sites for wood boiler application: A. School: By out side dimension, the lower floor has 4420 sq ft and the upper floor has 1200 sq ft for a total of 5620 sq ft. The shape of the school is 85' by 85' square with a "cut out" on the SW corner of 25' by 40'. There was an addition of 16' by 20' added on the NE corner. At this point RBA Engineers does not have any detailed information on the existing heating system. Heat and ventilation is provided by a combination of hydronic baseboard and cabinet unit heaters as well air handler units. Both, the school and teacher housing are supplied by an external boiler room. B. Teacher Housing: The approximate square footage of the teacher housing is between 1,000 and 1,100 square feet. C. Wood Boiler \ Wood Shed: One wood boiler will supply both buildings by connecting to the existing HGS/R piping in the in external boiler room. The heat from the wood boiler will be delivered via arctic pipe. The wood shed will have storage capacity for 60% of the annual wood demand. Its roof will extend over the boiler and operating area. The wood boiler and shed will be secured by a 6’ high chain link fence. Economically, this option has a faster payback since the arctic pipe connection between wood boiler and existing boiler room is very short. Even though two (2) buildings are being heated only one connection is needed. Thus, only one heat exchanger and limited glycol piping help keeping the costs low. Assumptions: Wood Energy Content - Assumed to be air dried to 20% moisture. Spruce wood including 10% dead trees Wood Boiler-Central E Classic 2400 PROJECT:LP-02, HELE WOOD BOILER DATE:LOCATION:Iguigig, AlaskaINSIDE TEMP:65HEAT DEG DAYS:11456(Climate Data from King Salmon)WINTER DESIGN TEMP(99.6%):-24CALC BY:Engineer JOB NO.:LP-02SCHOOL AND HOUSINGFuel Type Fuel UnitFuel Price Per Unit ($)Fuel Heat Content Per Unit (Btu)Fuel Price Per Million Btu ($)Heating Appliance TypeType of Effic. Rating Effic. (%)Fuel Cost Per Million Btu ($)Fuel Oil (#2)Gallon$6.00138,690$43.26BoilerAFUE78%$55.46Gallon$6.50138,690$46.87BoilerAFUE78%$60.09Gallon$7.00138,690$50.47BoilerAFUE78%$64.71Wood (Spruce)Cord$250.0017,000,000$14.71BoilerManuf.90%$16.3420% MoistureCord$375.0017,000,000$22.06BoilerManuf.90%$24.51Cord$500.0017,000,000$29.41BoilerManuf.90%$32.68FUEL CONSUMPTION AND WOOD EQUIVALENTFacilityHeat Loss (Btu/Hr)Annual Fuel Oil Demand (Gal/Yr)Ratio (Wood/ Oil)Annual Wood Demand (Cords/Yr)Suggest. Wood Boiler Load (Btu/Hr)Burn Time Model Eclass 2400 FacilityWood Vol. (Cf)60% Of Wood Stored Under Shed Max Stack Height (Ft)Shed Floor Area (Sf)Shed Floor Area (Sf)School&Housing162,027462795%35.9171,0288.00All Bldgs4,5902,7546459.021$6.00$6.50$7.00$250.00$375.00$500.00LowMediumHighLowMediumHighAll Bldgs$27,762$30,076$32,389$8,965$13,448$17,930$9,832$16,628$23,424$117,0001275loop (No additional terminal devices needed)*Wood Boiler-Central E Classic 2400* Wood Energy Content - Assumed to be air dried to 20% moisture. FacilityPotential Gross Savings ($)Annual Fuel Oil Cost ($) @ ($__/Gal)*Connecting wood boiler heat to existing hydronic heating Payback (Yrs)Invest Cost ($)Annual Wood Cost ($) @ ($__/Cord)6/2/2010*Spruce wood including 10% dead treesWOOD SHED DIMENSIONSECONOMIC ANALYSISHEATING FUEL COMPARISON OIL VERSUS WOODAssumptionsWood Boiler Heat Calcs 1 OF 1 JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&TEACHER HOUSINGTYPE OF ESTIMATE: RFPSHEET: 1 OF 4____ ITEM & DESCRIPTION QTYUNIT MATL S/C UNIT TOTAL $/HR MATERIAL LABORSUBCONTRACT TOTALSTRUCTURAL SHED52,747$ MECHANICAL BOILER/SHED51,248$ ELECTRICAL BOILER SHED13,031$ GRAND TOTAL117,026$ Notes:1. Prices Based on 2011 Construction Season. CLIENT: IGIUGIG, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST JOB HOURS JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&TEACHER HOUSINGTYPE OF ESTIMATE: RFPSHEET: 2 OF 4____ ITEM & DESCRIPTION QTY UNIT MATL S/C UNIT TOTAL $/HR MATERIALLABORSUBCONTRACT TOTALWOOD AND BOILER SHED 600 SF 45.00$ 27,000$ FENCE 240 FT 7.50$ 1,800$ -$ -$ -$ -$ -$ -$ CONTINGENCY @ 10%2,880$ CONTRACTOR'S OH & P3,485$ Add, 10% & 10% GRAND TOTAL35,165$ For Igiugig, use a factor of 1.5 to cover remote working conditions150%IGIUGIG AREA LOCAL COST ESTIMATE =52,747$ Notes:1. Prices Based on 2011 Construction Season. The tabulated values are applicable to Anchorage; factor of 1.5X is applied for Igiugig. CLIENT: IGIUGIG, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST JOB HOURS JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&TEACHER HOUSINGTYPE OF ESTIMATE: RFPSHEET: 3 OF 4____ ITEM & DESCRIPTION QTY UNIT MATL S/C UNIT TOTAL $/HR MATERIALLABORSUBCONTRACT TOTALBOILER & HEATING EQUIPMENTCentral Boiler 1 EA 14,000.00$ 25 25 75 15,875$ Heat Exchangers 1 EA 400.00$ 5 2 75550$ Boiler stack 1 EA 500.00$ 4 4 75800$ Skid for boiler 1 CY 500.00$ 0.5 0.5 75538$ Circulation pump 1 LOT 180.00$ 3 3 75405$ Cabinet Unit heater 0 EA 1,300.00$ 2.5 0 75-$ Baseboard 0 FT 75.00$ 0.5 0 75-$ Expansion Tank 1 EA 200.00$ 2 2 75350$ Strainer, ST-1 1 EA 150.00$ 2 2 75300$ Air seperator, AS-1 1 EA 350.00$ 2 2 75500$ Boiler Tekmar controls + startup 1 EA 1,000.00$ 10 10 75 1,750$ Thermostats 0 EA 100.00$ 0.5 0 75-$ Misc. equipment 1 EA 1,000.00$ 10 10 75 1,750$ Acrtic Pipe 35 FT 42.00$ 0.75 26.25 75 3,439$ (HDPE Jacket)SYSTEM PIPINGDistribution HWS/R piping, 1" 0 LF 10.50$ 0.3 0 75-$ Distribution HWS/R piping, 1-1/2" 50 LF 12.00$ 0.3 15 75 1,725$ CONTINGENCY, OVERHEAD & PROFITCONTINGENCY @ 10% 2,798$ CONTRACTOR'S OH & P 3,386$ Add, 10% & 10% GRAND TOTAL34,165$ For Igiugig, use a factor of 1.5 to cover remote working conditions150%IGIUGIG AREA LOCAL COST ESTIMATE =51,248$ Notes:1. Prices Based on 2011 Construction Season. The tabulated values are applicable to Anchorage; factor of 1.5X is applied for Igiugig.CLIENT: IGIUGIG, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST JOB HOURS JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&TEACHER HOUSINGTYPE OF ESTIMATE: RFPSHEET: 4 OF 4____ ITEM & DESCRIPTION QTYUNIT MATLS/C UNIT TOTAL $/HR MATERIALLABORSUBCONTRACTTOTALMISC. MATERIAL 1 LOT 1,000.00$ 1,000$ 2" CONDUIT 0 LF 11.00$ -$ 3/4" CONDUIT 100 LF 5.00$ 500$ 4/C #3 AWG CONDUCTOR 0 LF 6.50$ -$ 3/C #12 AWG w/ GROUND 100 LF 8.50$ 850$ DISCONNECTS 3 EA 1,000.00$ 3,000$ 3/C #10 AWG w/ GROUND 60 LF 12.75$ 765$ CONTROLS 1 EA 1,000.00$ 1,000$ CONTINGENCY, OVERHEAD & PROFITCONTINGENCY @ 10%712$ CONTRACTOR'S OH & P861$ Add, 10% & 10% GRAND TOTAL8,687$ For Igiugig, use a factor of 1.5 to cover remote working conditions150%IGIUGIG AREA LOCAL COST ESTIMATE =13,031$ Notes:1. Prices Based on 2011 Construction Season. The tabulated values are applicable to Anchorage; factor of 1.5X is applied for Igiugig.2. Wiring includes 4% slack. CLIENT: IGIUGIG, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST JOB HOURS