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FEDS - Facility Energy Decision System

What's New?

FEDS 6.0—Now Available

FEDS 6.0 marks yet another significant step forward in the continued evolution of the FEDS software. Picking up where FEDS 5.0 left off, FEDS 6.0 has added enhancements to make it more powerful and flexible than ever, and just as easy to use. detailed central energy plant and thermal loop module has been added that vastly improves modeling of central steam, hot water, and chilled water—from the equipment that generates it to the distribution loops that deliver it to the buildings where it provides heating, cooling, hot water, or other services—and calculates the energy content and losses at each step. A number of other new and improved features have also been added to FEDS 6.0, including new technologies, updated data, and more detailed means of specifying a building's occupancy profile and geometry.

Completely Updated Central Energy Plants and Thermal Loops Module

FEDS 6.0 will now enable much more detailed specification and analysis of any number of central energy plants and their associated loops. FEDS 6.0 can determine:

  • The total load from all connected buildings and other central plant equipment, both at baseline and throughout the retrofit optimization process.
  • The value of steam, hot water, or chilled water delivered to each building, considering central plant equipment types and efficiencies, source fuel costs, auxiliary power requirements, O&M costs, loop losses, and other parameters .
  • The cost effectiveness of various decentralization options including:
    • Which individual technologies served centrally should be replaced with distributed technologies.
    • Which thermal loops of a central energy plant should be abandoned with all attached technologies becoming decentralized.
    • Which central energy plants should be abandoned with all attached loops becoming abandoned and all attached technologies becoming decentralized.

This central plant and thermal loop analysis occurs automatically in conjunction with optimization of building energy systems.

Advanced Building Geometry Capability

An advanced geometry option allows users to specify detailed building geometry parameters at the specific zone and/or orientation level. This enables more detailed and accurate modeling of unique and difficult to model buildings, such as those with non-uniform geometries (that may impact a zone's wall or roof area, or volume) or envelope characteristics (e.g., different window areas on each side of the building). Parameters that are available by zone for advanced specification include the following:

  • Exterior wall area
  • Exterior window area
  • Roof area
  • Floor area (both total and ground floor)
  • Exterior perimeter length
  • Conditioned air volume.

Replace on Failure Economics (i.e., "Force Retrofits")

From its inception, FEDS has always provided retrofit recommendations based on detailed life-cycle cost analysis. However, it has always been assumed that the current building technology or component was in working order and did not have to be replaced. Now, with FEDS 6.0, users have the ability to specify that a particular piece of equipment or component must be replaced, and therefore require that FEDS select the best, most life-cycle cost effective replacement. Whether it be that the furnace has stopped working or that the windows must be replaced, FEDS can now perform the necessary analysis to inform you on what the best replacement would be. With a simple check of a box, you can instruct the model to determine the best replacement, as well as the estimated cost of the project. This provides the option to force specific building technology or envelope retrofits, or the abandonment of specific thermal loops or entire central plants.

Enhanced Occupancy Profile Definition

FEDS 6.0 provides greatly enhanced specification of building occupancy profiles:

  • 4-day workweeks: specify whether your facility operates on a 5-day (Mon-Fri) or 4-day (Mon-Thur) schedule. This can be specified at the individual building set level to mix and match schedules within your case to best fit actual occupancy patterns.
  • Variable occupancy specification: expanding upon the previous monthly occupancy inputs (which allowed you to specify whether a building was operating or not during each given month), this new feature will allow much greater flexibility by being able to not only model building operation for fractions of each month, but also whether the non-operating portion represents fully unoccupied periods or low-occupancy periods.

Additional Technologies

Numerous new technology options have been added to FEDS 6.0, including the following:

  • Radiant and infrared heating: a variety of radiant and infrared configurations are available to suit a range of cost effective heating applications
  • More detailed chiller type specification (water- versus air-cooled, along with reciprocating, centrifugal, and absorption options)
  • Water-cooled chillers plus cooling tower retrofit options for existing air-cooled chillers and building chiller systems as replacements for window air conditioners
  • New baseline and retrofit lighting technology options including additional compact fluorescent options, super T-8s, biax lamps, and high output T5s.

Data Updates and Other Enhancements

New and updated data include:

  • New weather data—1,504 additional weather data files (originating from various formats including TMY3, TMY2, WYEC2, TRY, and some specially developed for FEDS) providing significantly enhanced coverage for most locations in the U.S. For cities with multiple data types available, you will be able to select which weather station you would like to run, if desired.
  • Enhanced capability for modeling buildings and projects in Canada: 76 new Canadian weather data files, plus provincial labor rates and materials costs, exchange rate, and more.
  • The latest DOE/EIA discount and energy escalation rates.

Other key enhancements include the following:

  • Import building sets from other cases—an import tool to allow building sets from other existing cases to be added into the current case, to allow the combining of data for integration of multi-user input sessions or simply to combine data from separate case files.
  • Import building sets information from database—an import tool that allows building set information to be imported from a structured database; both minimum set and maximum detail data can be imported.
  • User-modifiable emissions factors for six pollutant types for each fuel.
  • Enhanced output reports—additional features on the output reports include energy intensity values for all building sets and the entire facility by fuel type, and central plant and thermal loop details.

FEDS 6.0 is now available! See "How to get FEDS" to order your copy today!


Now Available!

FEDS 6.0

Available Upgrades