1.5.6 Variable Demand Controls
Reduce energy consumption by running conveyance and HVAC systems only when needed, based on sensor readings.
Escalators: Motion sensors in escalators recognize when an passenger is approaching and run only when occupied.
Elevators: Elevators go in to “sleep mode” when not in use, reducing standby energy consumption by turning off lights, ventilation, and signalization when not needed.
HVAC: Install variable air volume (VAV) or variable refrigerant flow (VRF) systems that adjust output to match demand.
Variable speed escalators have been installed in airports and train stations throughout Europe, in New York City subways, and in retail department stores including Saks Fifth Avenue, Zara, and Marks and Spencers.
Variable speed systems require additional first costs but immediate energy savings create a relatively short return on investment. Exact ROI will depend on the project type and occupancy patterns.
Variable speed control systems respond to occupant demand.
Commissioning is essential to assure that variable speed systems are working properly. Variable speed escalators may require passenger education as they appear to be “off” when not occupied; passengers unfamiliar with such systems may avoid the escalators thinking they are broken or step on an escalator going in the wrong direction.
1.3.2 Daylighting Controls
1.5.1 Energy Use monitoring
1.5.2 Elec./Mech Demand
5.3.2 Project Economics