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Demonstration of Energy Savings in Commercial Buildings for Tiered Trim and Respond Method in Resetting Static Pressure for VAV Systems

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Technical Report,01 Sep 2014,01 Feb 2017

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Iowa State University Ames United States

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For existing buildings with variable air volume VAV system and direct digital control at the zone level, a modified version of the Trim and Respond method, the Tiered Trim and Respond TTR method, was implemented at five existing Iowa Army National Guard facilities to show energy savings compared to Fixed Pressure Control method. Comparisons were made by alternating static pressure control modes every two weeks between fixed static control and TTR control over a one year period at these facilities. Demonstration results showed that total fan energy savings for the five demonstration sites ranged from 14.4 to 34.8 compared with fixed static pressure control. Reduction in overall GHG emissions at five sites ranged from 0.6 to 4.7 . Simple payback years are 1.7, 4.9, 5, 11.8 and 14.9 years. Users building occupants and facility engineers mostly had no additional comfort complaints. The potential reduction in site energy across DoD installations could be 295 GWh per year, and the potential electricity cost savings could be 29.5 million per year.

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating
  • Logistics, Military Facilities and Supplies

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