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HomeMy WebLinkAboutUpper Kobuk Region Biomass Project Proposed Shungnak Community Center Engineering Package - 2015 - REF Grant 7040028, 7050840Northwest Arctic Borough Upper Kobuk Biomass Project Appendix B - 0 APPENDIX B – PROPOSED SHUNGNAK COMMUNITY CENTER ENGINEERING PACKAGE --- B-1: Project Site Plan B-2: General Arrangement B-3: Bill of Materials Estimate B-4: Heat Loading Calculations B-5: Wood Utilization and Fuel Oil Offset Calculations B-6: Life-Cycle Value Analysis Pro Forma COMMUNITYCENTER12'-0"12'-0"6"TYP.12"-20"CLEARANCE21" CLEARANCEMIN. 32" CLEARANCEENLARGED PLAN Northwest Arctic Borough Upper Kobuk Biomass Project Appendix B - 3 Bill of Materials FrolingModel FHG-L30ShungnakCoffe House Description Quanity Total Cost Vendor FrolingModel FHG-L30BoilerPKG 1 10,868.00$ TARMCorp. SHST440PAK Thermal StgKit 1 6,903.00$ TARMCorp. Grundfos Alpha15-55F CastIron pump with terminal box (1 ½")1 158.85$ pexsupply.com Assorted CopperPipe andFittingsto tie in to system byothers 1 900.00$ Grainger Non-ToxicHeatTransferFluid (propylene glycol) 300 4,250.00$ pexsupply.com Class A Through the Wall 6"Chimney kit 1 2,066.00$ woodlanddirect.com Northwest Arctic Borough Upper Kobuk Biomass Project Appendix B - 4 DESIGN CONDITIONS Design Indoor temp 70 F Design Outdoor temp -47 F ASHRAE (97.5% for Fairbanks, AK) Wall insulation R-21 0.0476 Roof insulation R-36 0.0278 Crawlspace insulation R-36 0.0278 Window rating R-2.4 0.4167 Door rating R-4 0.2500 EXPOSED SURFACE AREAS Length Height Area WALLS ft ft ft 2 North Face 54 8 432 East Face 32 8 256 South Face 54 8 432 West Face 32 8 256 qty Windows (Qty (5) 3-0x4-0) 5 3 4 60 Doors 1 3 7 21 ROOF AND CRAWL SPACE Building floor area 1568 Conductive Heat Loss U area delta T Heat Loss (Btu/hr-ft2-F)(ft2) (F) (Btu/hr) Total Wall Area 0.0476 1295 117 7,215 Window Area 0.4167 60 117 2,925 Door Area 0.2500 21 117 614 Total Roof Area 0.0278 1882 117 6,115 Total Crawl Space Area 0.0278 1568 117 5,096 Subtotal Conductive Heat Loss 21,965 Convective Heat Loss Fenestration - lineal feet of crack 105 LF Fenestration 1.05 cfm/LF Fenestration subtotal 110 cfm Ventilation rate (ASHRAE) 0.25 cfm/ft2 Ventilation subtotal 392 cfm Total Ventilation 502 cfm Subtotal Ventilation Heat Required 64,640 Btu/hr Heat Required =1.1 x cfm exhausted x (design inside T - design outside T) Total Building Heat Required 86,605 Btu/hr Proposed Community Center Heating Requirements Northwest Arctic BoroughUpper Kobuk Biomass ProjectAppendix B - 5ASSUMPTIONS:1. Wood fired heater is fueled 7 days a week over an eight (8) hour period. It is estimated this will result in an average daily firing rate of 9 hours.2. Heat storage in wood heater jacket maintains building temperature until heat storage is exhausted3. Oil fired heaters kick on to maintain building temperature until wood fired heater is refueled and fired.DESIGN CONDITIONSJAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DECDesign Indoor temp7070 70 70 70 70 70 70 70 70 70 70Avg Monthly High Outdoor temp3 11 25 44 61 717166 54 32 12 7Avg Monthly Low Outdoor temp-11 -7 2 21 36 48 51 45 34 16 -2 -8Avg Monthly Outdoor temp-42 13.5 32.5 48.5 59.5 61 55.5 44 24 5 -0.5Conductive Heat Loss UA187.7 187.7 187.7 187.7 187.7 187.7 187.7 187.7 187.7 187.7 187.7 187.7Convective Heat Loss factor552.475 552.475 552.475 552.475 552.475 552.475 552.475 552.475 552.475 552.475 552.475 552.475Avg Heat Load (Btu/hr)54,776 50,335 41,822 27,758 15,915 7,772 6,662 10,733 19,246 34,050 48,114 52,185Monthly Heat Load (Btu/month)39,438,596 36,240,872 30,111,901 19,985,775 11,458,511 5,596,017 4,796,586 7,727,833 13,856,804 24,515,884 34,642,010 37,573,257GARN Heat Storage Capacity242000 242,000 242,000 242,000 242,000 242,000 242,000 242,000 242,000 242,000 242,000 242,000Hours of storage4.42 4.81 5.79 8.72 15.21 31.14 36.33 22.55 12.57 7.11 5.03 4.64MAXFiring Time - GARN unit9 9 9 9 9 9 9 9 9 9 9 9Off Time - (heat storage)4.42 4.81 5.79 8.72 15.21 31.14 36.33 22.55 12.57 7.11 5.03 4.64Oil Firing Time10.58 10.19 9.21 6.28 0.00 0.00 0.00 0.00 2.43 7.89 9.97 10.36Fuel Oil Usage (Btu output/month)17,389,123 15,390,545 11,559,938 5,231,109 0 0 0 0 1,400,503 8,062,428 14,391,256 16,223,286Annual Heat Load (Btu/year) 265,944,046Annual Fuel Oil Heat Load (Btu/year) 89,648,187Annual Offset Fuel Oil (Btu Output/year) 176,295,859conversion 8.766 gallon No.2 fuel oil/million Btu outputAnnual Fuel Oil Offset 1,545 gallons per yearWood Use 13.08 cords per yearProposed Community Center Fuel Oil Offset Northwest Arctic BoroughUpper Kobuk Biomass ProjectAppendix B - 6Year ConstructionCords WoodFeedstock Operation and Avoided Cost Net End-ofYearInputsProcessed Cost Maintenance (Fuel Oil) Revenue (Loss) BalanceFeedstock Material Cord Wood 0($29,671)13($3,139) ($11,600)$16,362($28,049) ($28,049)Process Input (cords/yr) 13.08 1 13($3,139) ($11,600)$16,362 $1,622($26,426)Process Input (tons/yr) 17.13 2 13($3,249) ($11,774)$16,934 $1,911($24,515)Feedstock Cost ($ / cord) $240 3 13($3,363) ($11,951)$17,527 $2,214($22,302)4 13($3,480) ($12,130)$18,140 $2,530($19,772)Captial Expenditure (Net) $29,671 5($1,500)13($3,602) ($12,312)$18,775 $1,361($18,411)O&MExpense (annual) $11,600 6 13($3,728) ($12,496)$19,432 $3,208($15,203)7 13($3,859) ($12,684)$20,113 $3,570($11,633)Fuel Oil Savings (gal annual) 1,545 8 13($3,994) ($12,874)$20,816 $3,948($7,685)Fuel Oil Cost ($ / gal) $10.59 9 13($4,134) ($13,067)$21,545 $4,344($3,341)10($1,500)13($4,278) ($13,263)$22,299 $3,257($84)inflation rate 1.5% 11 13($4,428) ($13,462)$23,080 $5,189 $5,106 * Simple Paybackenergy value inflation rate 3.5% 12 13($4,583) ($13,664)$23,887 $5,640 $10,746Discount rate 5% 13 13($4,744) ($13,869)$24,723 $6,111 $16,856O&Mcost adjustment factor 1 14 13($4,910) ($14,077)$25,589 $6,602 $23,45815($1,500)13($5,081) ($14,288)$26,484 $5,615 $29,07316 13($5,259) ($14,503)$27,411 $7,649 $36,72217 13($5,443) ($14,720)$28,371 $8,207 $44,92918 13($5,634) ($14,941)$29,364 $8,789 $53,71819 13($5,831) ($15,165)$30,391 $9,395 $63,11320 13($6,035) ($15,393)$31,455 $10,027 $73,141$73,141$29,09811.5%Life-Cycle Cost Model - Proposed Shungnak Community CenterPressurized Wood Boiler - Froling FHG-30Total Project Value (end of life)Net Present Value (NPV)Internal Rate of Return (IRR)