Efficiency Calculator
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Boiler/Operating Information
| Fuel Type | ||
| Boiler Nominal Rating | ||
| Ambient Temprature, °F | ||
| Stack Temprature, °F1 | ||
| Average % O2 in Stack (Dry), % | ||
| Boiler Annual Operating Hours | ||
| Average Load, % | ||
| Known or Calculated Radiation & Convection Losses? | ||
| User Input Rad & Convection Losses,% of Rated Input | ||
| Cylindrical or Rectangular Style Boiler? | ||
| Boiler Diameter,ft | ||
| Boiler Length,ft | ||
| Boiler Height,ft | ||
| Boiler Width,ft | ||
| Boiler Average Surface Temperature, °F | ||
| Average Wind Speed in Boiler Room,mph | ||
Fuel Prices
| Natural gas Cost, $/Therm | $ |
| Propane Cost, $/Gallon | $ |
| # 2 Fuel Oil Cost, $/Gallon | $ |
Results
| Boiler Rated Input (nominal), Btu/hr | 576000 |
| Average Load, Btu/hr | 15200 |
| Fuel Lower Heating Value (LHV), Btu/lb | 19886 |
| Fuel Higher Heating Value (HHV), Btu/lb | 21573 |
| Excess Air | 36.80 % |
| Radiation & Convection Losses at Rated Load,% | 0.35 |
| Radiation & Convection Losses at Average Load,% | 0.00 |
| Boiler Efficiency at Avg Load,%(drop the HHV),2 | 83.64 |
| GHG (CO2) Produced at Avg Load, Tonnes/yr3 | 717.90 |
| Annual Operating Cost | 5492 |
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Reduced excess air savings - w/o economizer
| Reduction in Excess Air, % | |
| New Average O2 Level in Stack, % | 4.06 |
| New Boiler Efficiency, % | 84.42 |
| New Annual Operating Cost | 5441 |
| REDUCTION IN GHG(CO2) Produced at Avg Load, Tonners/yr 3 | 0.34 |
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| Reduced Excess Air - Annual Savings | 51 |
Boiler Stack eConomizer savings
| Stack Temperture Reduction, oF | |
| Economizer Stack Outlet Temperature, oF | 325.0 |
| Boiler-Economizer Pkg Efficiency, % | 85.56 |
| Boiler-Economizer Pkg Annual Operating Cost | 5369 |
| REDUCTION IN GHG(CO2) Produced at Avg Load, Tonners/yr 3 | 0.50 |
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| Stack Economizer - Annual Savings | 123 |
| Boiler Efficiency with Saving Measure Employed | 00.00 % |
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| Total Potential Annual Saving | $ 7,267 |
| Total GHG Reduction Potential, Tonners/yr3 | 29 |
Notes:
1.Minimum Allowable Stack & Economizer Outlet Temp is 140 °F
2.Heat Loss Method, based on Siegert Formula including R&C Losses
3.Greenhouse Gases(GHG) expressed a metric tons CO2 based on average load