The URL can be used to link to this page

Home My WebLink About8 SUBMITTAL PORT ALSWORTH (2) PORT ALSWORTH Port Alsworth Wood Boiler Study RBA Job No. LP-02 June 1, 2010 The following buildings were considered as potential sites for wood boiler application: A. Bldg. #12, School: The boilers for the school are located in the Power Plant which holds two (2) Burnham Model 904A with supply temperature of 170 degrees. The building has a forced air system. The Mechanical Room has a mixing box with a heat exchanger. There is a small secondary heat exchanger for the kitchen area. There is an indirect fired water heater, 50 gallons, a Boilermate. Estimate 500 gallons per year usage, including duplex. B. Bldg. #17, Fire House/Pre-School: The building is a new construction with radiant floor and two (2) boilers: Burnham PV7- 4WD, 156 MBH, water 136 MBH, fuel = 1.35 GPH. It has (2) 600 gallon fuel tanks. Estimated fuel usage is 1,500 gallons per year. HW is indirect fired Weil-McLain – Ultra Plus, 50 gallons. Classroom is supplemented with a Monitor 2400 heater. I was informed that the school district leases the lower half of the building and subsidizes a portion of the annual fuel cost. The Second Floor has an efficiency one bedroom apartment and an office area, along with a large unfinished area. The building has two (2) zones and pumps. In this building, the HGS/R piping from the wood boiler will be connected to the existing hydronic heating system. C. Wood Boiler \ Wood Shed: One wood boiler will supply both buildings by connecting to the existing HGS/R piping in the power plant of the school and to the existing hydronic heating system in the fire house. 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 very slow payback. The low fuel consumption of both buildings compared to other villages makes this location the least attractive one for wood boilers. Assumptions: Wood Energy Content - Assumed to be air dried to 20% moisture. Spruce wood including 10% dead trees Wood Boiler-Central E Classic 2400 HEATING ENERGY / WOOD REPLACEMENT ANALYSIS RBA ENGINEERS, INC301 EAST FIREWEED LANE, SUITE 100 ANCHORAGE, AK 99503PROJECT:LP-02, HELE WOOD BOILER DATE:LOCATION:Port Alsworth, AlaskaINSIDE TEMP:65HEAT DEG DAYS:11456(Climate Data from King Salmon)WINTER DESIGN TEMP(99.6%):-24CALC BY:Engineer JOB NO.:LP-02SCHOOL & IMPROVEMENT CENTER/FIREHALLFuel 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 1 (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 (Cf)Max Stack Height (Ft)Shed Floor Area (Sf)Shed Floor Area (Sf)School&Firehall70,035200095%15.573,92614All Bldgs1,9841,1906198.414$6.00$6.50$7.00$250.00$375.00$500.00LowMediumHighLowMediumHighAll Bldgs$12,000$13,000$14,000$3,875$5,813$7,750$4,250$7,187$10,125$191,790452719Annual Fuel Oil Cost ($) @ ($__/Gal)6/2/2010WOOD SHED DIMENSIONSECONOMIC ANALYSISHEATING FUEL COMPARISON OIL VERSUS WOODAssumptionsAnnual Wood Cost ($) @ ($__/Cord)* Wood Energy Content - Assumed to be air dried to 20% moisture. FacilityPotential Gross Savings ($)*Use heat exchanger to connect wood to existing hydronic heating*Wood Boiler-Central E Classic 2400*Spruce wood including 10% dead treesPayback (Yrs)Invest Cost ($)Wood Boiler Heat Calcs 1 OF 1 JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&IMPROVEMENT CENTER/FIREHALLTYPE OF ESTIMATE: RFPSHEET: 1 OF 4____ ITEM & DESCRIPTION QTYUNIT MATL S/C UNIT TOTAL $/HR MATERIAL LABORSUBCONTRACT TOTALSTRUCTURAL SHED36,264$ MECHANICAL BOILER/SHED131,808$ ELECTRICAL BOILER SHED23,718$ GRAND TOTAL191,790$ Notes:1. Prices Based on 2011 Construction Season. JOB HOURSCLIENT: PORT ALSWORTH, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&IMPROVEMENT CENTER/FIREHALLTYPE OF ESTIMATE: RFPSHEET: 2 OF 4____ ITEM & DESCRIPTION QTY UNIT MATL S/C UNIT TOTAL $/HR MATERIALLABORSUBCONTRACT TOTALWOOD AND BOILER SHED 400 SF 45.00$ 18,000$ FENCE 240 FT 7.50$ 1,800$ -$ -$ -$ -$ -$ -$ CONTINGENCY @ 10%1,980$ CONTRACTOR'S OH & P2,396$ Add, 10% & 10% GRAND TOTAL24,176$ For Port Alworth, use a factor of 1.5 to cover remote working conditions150%PORT ALSWORTH AREA LOCAL COST ESTIMATE =36,264$ Notes:1. Prices Based on 2011 Construction Season. The tabulated values are applicable to Anchorage; factor of 1.5X is applied for Alsworth. JOB HOURSCLIENT: PORT ALSWORTH, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&IMPROVEMENT CENTER/FIREHALLTYPE 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 2 EA 400.00$ 5 2 75950$ 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 400 FT 42.00$ 0.75 300 75 39,300$ (HDPE Jacket)SYSTEM PIPINGDistribution HWS/R piping, 1" 140 LF 10.50$ 0.3 42 75 4,620$ Distribution HWS/R piping, 1-1/2" 140 LF 12.00$ 0.3 42 75 4,830$ CONTINGENCY, OVERHEAD & PROFITCONTINGENCY @ 10% 7,197$ CONTRACTOR'S OH & P 8,708$ Add, 10% & 10% GRAND TOTAL87,872$ For Port Alworth, use a factor of 1.5 to cover remote working conditions150%PORT ALSWORTH AREA LOCAL COST ESTIMATE =131,808$ Notes:1. Prices Based on 2011 Construction Season. The tabulated values are applicable to Anchorage; factor of 1.5X is applied for Alsworth.JOB HOURSCLIENT: PORT ALSWORTH, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST JOB NO. & TITLE: LP-02, HELE WOOD BOILER DATE: BUILDING: SCHOOL&IMPROVEMENT CENTER/FIREHALLTYPE 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 400 LF 5.00$ 2,000$ 4/C #3 AWG CONDUCTOR 0 LF 6.50$ -$ 3/C #12 AWG w/ GROUND 400 LF 8.50$ 3,400$ DISCONNECTS 3 EA 1,000.00$ 3,000$ 3/C #10 AWG w/ GROUND 200 LF 12.75$ 2,550$ CONTROLS 1 EA 1,000.00$ 1,000$ CONTINGENCY, OVERHEAD & PROFITCONTINGENCY @ 10%1,295$ CONTRACTOR'S OH & P1,567$ Add, 10% & 10% GRAND TOTAL15,812$ For Port Alworth, use a factor of 1.5 to cover remote working conditions150%PORT ALSWORTH AREA LOCAL COST ESTIMATE =23,718$ Notes:1. Prices Based on 2011 Construction Season. The tabulated values are applicable to Anchorage; factor of 1.5X is applied for Alsworth.2. Wiring includes 4% slack. JOB HOURSCLIENT: PORT ALSWORTH, AK6/2/2010GENERAL ESTIMATING WORKSHEETTOTAL COSTTAKEOFF: __Michael HaukePRICED: ___Michael HaukeCHECKED: _Raj Bhargava, PEAPPROVED: __Raj Bhargava____UNIT COST