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Cogeneration Savings Estimator


Continuous (24 x 7 x 365)  Applications

  The Cogeneration (combined heat and power, CHP) system produces electricity and useful heat. simultaneously. This heat is used for hot water heating, space heating, industrial process heating, dehumidification, or to drive an absorption cooling/air conditioning system. The Cogeneration system is very cost-efficient, often with a payback period of 1 to 4 years. Hospitals, Hotels, and Nursing Homes are excellent candidates for CHP because they have high electrical and thermal energy needs and significant energy demands 24/7/365.
  Use the Cogeneration Estimator to determine the amount of electricity and useful heat that will be supplied (offset) by different systems. Choose a system that closely matches your heating and electricity needs. The Estimator also allows you to compare monthly payments with an all-electric system, determine annual savings and simple payback time.
Choose a Power Unit Engine-Generator Type Your State Electricity Cost

Available Energy (kWh) Per Month

Electric Energy Heat Energy Total
0 0 0

Estimated CHP System Costs

Electric Power Generator
Heat Recovery Equipment
Cooling/Dehumidification Equipment
Additional Equipment/Costs
Site Preparation
Government Incentives
CHP System Cost  

Monthly Costs

CHP Financing Interest Rate  
CHP Finance Cost  
Loan Period  
Fuel Cost  
O&M Cost  
Total Monthly Cost  
Financial Summary

Energy Cost, if All-Electric System


CHP Energy Cost


CHP Energy Cost/kWh


Annual Savings


Payback Period

View/Edit defaults

Change Default Values

Natural Gas Price /therm
Diesel Fuel Price* /gal
Market Sector
Financing Interest Rate %
Loan Period Years
Load Factor
Engine Efficiency
Total CHP Efficiency

*Diesel Price after road-tax subtracted




CHP Materials




Note: If you already own standby engine-generator equipment, it can be incorporated in your Cogeneration system. You may remove the cost of the engine-generator from the above estimate and run the Estimator again. Change Defaults

  Electricity Cost per kWh
  The map below shows average rates for electricity (2007) in different states. Enter the rate for electricity in your state in the Cogeneration Estimator. Click here to get the latest electricity rate by End-Use Sector, and by State.
  The cogeneration estimator is intended for preliminary evaluation only, and should not replace a detailed feasibility study. Additional evaluation tools are available here.