Dillard’sEnergy Management

Jeff BowenDillard’s Stores Services, Inc.

Little Rock, AR

EMS

• What it is –– ASI Controls – Direct Digital Controls– Web enabled

• What we use it for –– On/Off , Control temperature, control schedules,

On/Off, troubleshooting• How many do we have –

What the System Does• Manages, monitors and controls energy usage• We configure and monitor our networked facilities through our web

browser• We receive alarms and event notifications on email, mobile phone,

or via text message• We update lighting and/or climate control schedules at a facility, set

of facilities, or the entire network, with one command• We can integrate different devices from different manufacturers

using ASI’s WebLink• We analyze and graph trend data online or export it to Excel for

additional processing

ASI Controller

ASI Rooftop Unit Controller

How Many do we Have?

• 342 Stores (buildings) monitored– 292 are on a Wide Area Network (WAN)– 50 are on older dial-up technology

• 6 Distribution Centers monitored (WAN)• 2 Data Centers monitored (WAN)• 1 Corporate Office (WAN)• 351 Total Systems Monitored

Roof Top Systems Monitoring

• Roof Top HVAC Units –– Space Temperatures (alarm for high and low)– Unit Amperage– Supply Air Temperature– Return Air Temperature– Monitor the difference between supply air temperature

and return air temperature (alarm for high differences)– Approximately 15 points monitored on each RTU– 225 – 400 points monitored per store for HVAC alone– 78,125 points monitored daily (using averages)

Chiller Systems Monitoring

• Chiller Systems –– Supply Air Temperature/Space Temperature (air handler)– Amperage (chiller and air handlers)– Chiller Alarms – Chilled Water Temperatures– Condenser Water Temperatures– Cooling Tower Fan Status– Approximately 1,875 points monitored daily on chillers

Lighting Controls

• Lighting Controls are time based– Separated into 4 quadrants per store, per floor– Separated into –

• Work Lights – on 3 hours prior to store opening• Sales Lights – on 15 minutes prior to store opening• Feature Lights – on 8 minutes prior to store opening

• Manual Overrides upon request– Executive visits– Store Maintenance– Comfort Issues– Temporary Schedule Changes (sales, etc.)

Main Control Panel

• What else we monitor –– Emergency Generator Status and Alarm Condition– Escalator Run Status– Lighting Panel Overrides– Main Panel Override– Building Power – Voltage, kW, kWh, power factor– Photocells– Outside Air Temperature– Interior Humidity– Building Security System– Monitors Communication to HVAC systems

EMS – RTU Detail Screen

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kW Demand - Store 226 Altamonte Springs, FLEaster Holiday

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The Power of Off!

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Domain - Austin, TX - kW DemandJune 8 - 12, 2013

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Domain - Austin, TX - kW DemandJuly 10 - 14, 2013

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Domain - Austin, TX - ComparisonFriday June 14 vs. Friday July 12

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Questions?