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2 projects

Government

Energy saving for government buildings: air conditioning, lighting and operating schedules.

Where energy usually goes

Civic complex: isometric illustrationAn isometric drawing of a typical Civic complex building on its lot, with trees.

Illustration

  • ACMV
  • Lighting
  • Operating schedules

Systems 2R audits here

Air handlingAir from the air handling unit through the supply duct to the room and back, and where 2R checks airflow.
  1. Air handling unit (AHU) · blows air across the chilled-water coil and into the building
  2. Fan motor + VSD · varies the fan speed with demand instead of running flat out
  3. Cooling coil · chilled water in, cooled and dried air out
  4. Supply duct · carries conditioned air to the rooms
  5. Ceiling diffusers · spread the supply air across the room
  6. Return air · room air goes back to the AHU to be cooled again
  7. Room sensor · temperature or CO₂ reading that tells the AHU how hard to work
  8. Anemometer · air speed at the diffusers, to check the airflow: UNI-T UT363

Illustration of typical systems, not a client's plant.

LightingLED panels over the desks, an occupancy sensor, daylight from the windows and the lighting board, with 2R's lux meter.
  1. LED panels · efficient fittings, at the light level the task needs
  2. Occupancy sensor · switches lights off in empty areas
  3. Daylight · lights near the windows can dim when there's enough daylight
  4. Lighting board · where lighting circuits are measured and scheduled
  5. Lux meter · measures light levels at the desk: Kyoritsu 5202

Illustration of typical systems, not a client's plant.

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