Combined Heat and Power Market Study
The Combined Heat and Power (CHP) Potential at Federal Sites market study (PDF 357 KB), a technical report completed by Oak Ridge National Laboratory (ORNL) for FEMP, examines many questions surrounding CHP applications for Federal facilities. Download Adobe Reader.
Highlights from the report's executive summary are outlined below across:
Potential at Federal Sites
FEMP analysis estimated total potential CHP capacity to be 1500 to 1600 megawatts (MW), under the assumptions and parameters used in the analysis, for gas reciprocating engine or gas combustion turbine technologies in Federal facilities across the country. Electricity potentially produced with this capacity represents approximately 13% of all electric use in the Federal sector. The Federal building types with CHP potential were primarily hospitals, industrial, and research and development facilities.
Table 1 below summarizes analysis results, including the amount of capacity and savings for each building category studied. The assessment considered 7 building types for 28 different Federal agencies.
|Table 1. National CHP potential at Federal facilities larger than 25,000 ft² using base case assumptions|
|Total Mft², all buildingsa||141||115||514||41||144||136||463||2757b|
|Buildings with CHP payback < 10 years, Mft²||113||80||146||16||100||42||82||579|
|Estimated number of sites with CHP potential||235||75||167||38||70||42||74||700|
|Percent of sites with CHP potential||71%||42%||7%||38%||17%||5%||7%||9%|
|Potential TWh of electricity from CHP||2.93||2.25||0.76||0.24||0.81||0.06||0.65||7.69|
|Energy savings, TBtu||19.3||14.8||5.0||1.5||5.4||0.4||4.3||50.7|
|Potential CHP capacity, MW||446||342||248||36||265||18||211||2567|
aIncludes buildings in General Services Administration (GSA) database > 25,000 ft², even those without CHP potential
bTotal includes other building types not shown
Mft² = million square feet
TBtu = trillion Btu
TWh = terawatt hours
Under present assumptions, the regions with the greatest CHP potential are the Southwest (CA to TX), Northeastern metropolitan areas (NY to DC), and the Southeast (FL, GA, AL). Potential CHP capacity for each state is mapped in Figure 1 below.
The pie chart in Figure 2 shows the estimated amount of CHP capacity for 9 agencies. Other agencies each had capacities of less than 10 MW. Not surprisingly, the military branches had highest overall CHP potential in most building categories. Concentrations of potential CHP capacity at the various Federal agencies examined were as follows:
- Veterans Affairs: Hospitals
- National Aeronautics and Space Administration: Research, development, and industrial facilities
- Department of Energy: Research, development, and industrial facilities
- General Services Administration: Offices
- U.S. Postal Service: Offices
- Department of Justice: Prisons
Potential at Your Site
FEMP's national market assessment did not attempt to identify which specific sites have CHP potential. Site-specific information is needed to identify the actual best candidates for Federal CHP because the condition of existing equipment, energy use at a facility, prices paid for electricity and gas, and local regulations related to emissions, interconnection, and siting can vary widely by site.
However, FEMP recognizes the potential for CHP to reduce the costs of Government, increase energy security, and improve air quality, and is actively working to make advanced CHP technologies more easily accessible to Federal agencies. For help determining whether or not your Federal site has CHP potential, FEMP offers CHP screenings.
Potential for the Federal Sector
The CHP market study illustrated that the Federal sector has tremendous opportunity to receive the benefits CHP systems offer. The assessment revealed significant potential for CHP in the Federal sector. The 1.5 gigawatts (GW) of estimated potential in the base-case scenario had an average simple payback of 6 years and would save the Federal Government $170 million per year in energy costs.