HomeMy WebLinkAboutAS12-054 Tribal Complex Polysun Report - Financial[1]Financial Report
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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
City of Tanana Tribal
Complex
8d: Hot water (solar thermal, 2 tanks)
Location of the system
USA
AK Fairbanks
Longitude: -147.98°
Latitude: 64.82°
Elevation: 446 ft
This report has been created by:
Nathan Stumpff - Arctic Sun, LLC
Thorsten Chlupp
Po Box 74798
99707 Fairbanks
907/457-1297
System overview (annual values)
Total fuel and/or electrical energy consumption of
the system [Etot]32,891.5 kBtu
Total energy consumption [Quse]63,923.5 kBtu
System performance (Quse / Etot)1.94
Comfort demand Energy demand covered
Financial Report
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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Overview solar thermal energy (annual values)
Collector area 326.9 ft²
Solar fraction total 69%
Total annual field yield 47,713.6 kBtu
Collector field yield relating to gross area 146 kBtu/ft²/Year
Collector field yield relating to aperture area 160.1 kBtu/ft²/Year
Max. fuel savings 17.9 kWh(el.): [Electricity] , 434.3 gal: [Heating oil]
Max. energy savings 56,147.7 kBtu
Max. reduction in CO₂ emissions 10,917 pound
Solar fraction: fraction of solar energy to system
[SFn]
Horizon line
Meteorological data-Overview
Average outdoor temperature 29.2 °F
Global irradiation, annual sum 318.3 kBtu/ft²
Diffuse irradiation, annual sum 123 kBtu/ft²
Financial analysis - Solar thermal
Purchase costs 43,800 USD
Life span 30 years
Proportional incentives 0 %
Incentives per area 0 USD
Fixed incentives 0 USD
Inflation 1.3 %
Interest 0 %
Increase of energy prices 5 %
Electricity 0.71 USD/kWh(el.); 0.71 USD/kWh
Heating oil 5.504 USD/gal; 0.043 USD/kBtu
Effective purchase cost after grants 43,800 USD
Annual energy cost savings 2,402.594 USD
Financial Report
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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Financial analysis - Solar thermal
Solar energy cost per kWh 0.101 USD
Payback period 13 years
Present value of the system 197,160.453 USD
Net present value 153,360.453 USD
Component overview (annual values)
Boiler Oil boiler 100kW with internal pump
Power kBtu/hr 341.3
Total efficiency %65.3
Energy from/to the system [Qaux]kBtu 21,445.3
Fuel and electrical energy consumption [Eaux]kBtu 32,816.7
Energy savings solar thermal kBtu 56,086.7
CO₂ savings solar thermal pound 10,895.9
Fuel savings solar thermal gal 434.3
Collector North America Empire EC-40-1.5
Data Source SRCC
Number of collectors 8
Number of arrays 4
Total gross area ft²326.88
Total aperture area ft²297.945
Total absorber area ft²297.95
Tilt angle (hor.=0°, vert.=90°)°70
Orientation (E=+90°, S=0°, W=-90°)°0
Collector field yield [Qsol]kBtu 47,713.6
Irradiation onto collector area [Esol]kBtu 148,200
Collector efficiency [Qsol / Esol]%32.2
Direct irradiation after IAM kBtu 88,913.9
Hot water demand Constant
Volume withdrawal/daily consumption gal/d 240.2
Temperature setting °F 120
Energy demand [Qdem]kBtu 62,199.7
External heat exchanger Solar loop heat
exchanger Plate heat exchanger, large
Transfer capacity W/K 17,000
Pump Solar loop pump 2 Wilo-Stratos ECO-Z
Circuit pressure drop psi 11.064
Flow rate gpm 4.4
Fuel and electrical energy consumption [Epar]kBtu 25.8
Financial Report
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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Pump Solar loop pump 1 Wilo-Stratos 25/1-6
Circuit pressure drop psi 0.462
Flow rate gpm 4.8
Fuel and electrical energy consumption [Epar]kBtu 40
Storage tank Potable water tank 1 1500l buffer universal tank
Volume gal 396.3
Height ft 6.56
Material Steel
Insulation Rigid PU foam
Thickness of insulation in 3.1
Heat loss kBtu 1,317.8
Connection losses kBtu 8.3
Storage tank Existing Tank 300l potable water universal tank
Volume gal 79.3
Height ft 4.27
Material Stainless steel
Insulation Rigid PU foam
Thickness of insulation in 3.1
Heat loss kBtu 1,656.7
Connection losses kBtu 771
Loop
Solar loop
Fluid mixture Propylene mixture
Fluid concentration %40
Fluid domains volume gal 17.5
Pressure on top of the circuit psi 58.016
Financial Report
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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Solar thermal energy to the system [Qsol]kBtu
Heat generator energy to the system (solar thermal energy not included) [Qaux]kBtu
Solar fraction: fraction of solar energy to system [SFn]%
Financial Report
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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Total fuel and/or electrical energy consumption of the system [Etot]kBtu
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Solar thermal energy to the system [Qsol]
kBtu 47714 1089 3830 6184 5732 5775 5331 5321 4805 4383 3597 1685 -18
Heat generator energy to the system (solar thermal energy not included) [Qaux]
kBtu 21454 4806 1500 -6 164 198 510 578 961 1018 2252 3876 5596
Heat generator fuel and electrical energy consumption [Eaux]
kBtu 32826 7016 2448 0 298 348 958 1065 1665 1727 3512 5764 8026
Solar fraction: fraction of solar energy to system [SFn]
%69 18.5 71.9 100 97.2 96.7 91.3 90.2 83.3 81.1 61.5 30.3 0
Total fuel and/or electrical energy consumption of the system [Etot]
kBtu 32892 7017 2454 8 305 356 965 1073 1671 1733 3517 5767 8026
Irradiation onto collector area [Esol]
kBtu 148200 3524 11015 21020 20868 18731 15859 15530 13839 12618 9701 5496 0
Electrical energy consumption of pumps [Epar]
kBtu 66 2 6 8 7 8 7 7 7 6 5 3 0
Heat loss to indoor room (including heat generator losses) [Qint]
kBtu 15964 2461 1283 475 604 607 887 941 1145 1133 1606 2236 2586
Heat loss to surroundings (without collector losses) [Qext]
kBtu 721 31 79 111 89 72 56 56 57 60 61 49 1
Total energy consumption [Quse]
kBtu 63924 5455 4965 5539 5357 5535 5347 5363 5204 5049 5370 5289 5450
Financial Report
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Vela Solaris AG, their distribution partners or SPF do not accept any liability for the correctness of the specifications and the results.
Collector North America
Daily maximum temperature [ °F]
Energy flow diagram