Issue link: http://magazine.progressivegrocer.com/i/689994

188 | Progressive Grocer | Ahead of What's Next | June 2016 Equipment & Design HVAC Systems F ood retailers spend more than $4 per square foot annually on energy, according to Energy Star, with a large portion of this expenditure for HVAC (heating, ventilation, and air conditioning) systems. Tis fact is noted by Greg DuChane, retail-restau- rant vertical market leader at Davidson, N.C.-based Trane, who says that for an average-sized supermar- ket of 50,000 square feet, this equates to more than $200,000 in annual energy costs and 1,900 tons of carbon dioxide emitted into the atmosphere. Advances in HVAC systems are aimed at reducing those fgures. "Te introduction of variable-speed technologies in light commercial rooftop units — 3 to 25 tons — provides improved energy savings, dehumidifcation and moisture control," notes DuChane. "Previously, variable-speed technologies were only available in much larger units. Te variable-speed technology matches the HVAC unit's capacity to the store's vary- ing demand, which is based upon numerous factors that include customer trafc, building occupancy and heat-emitting equipment. By adjusting speed to meet the demand, this HVAC system afords the store All Systems Go Supermarket HVAC equipment is becoming more sophisticated and efficient. By Bob Ingram greater efciency and energy savings." Te integration of equipment controls is another advance, according to DuChane, who explains that a building automation system (BAS) allows for precisely controlled store conditions, which prevents product damage and spoilage, and enables additional energy management solutions. Trane ofers light commercial unitary rooftop units that use variable-speed technology for fans, compres- sors and condensers. Te HVAC systems also provide interoperability so they can communicate with other building systems like lighting and security. DuChane anticipates the continued adoption of dedicated outside-air strategies and expanded use of variable-speed technology across all HVAC platforms. Benefits of VRF Dennis Cobb, senior director, national accounts at Mitsubishi Electric Cooling & Heating, in Su- wanee, Ga., says his company has educated super- market architects and engineers on the benefts of variable refrigerant fow (VRF) in store designs. "Tese benefts are most obvious in areas that have proven cumbersome or challenging to properly If a retailer is only monitoring the temperatures in food cases, they are missing out on the potential efficiencies and gains from also monitoring their HVAC systems." —Paul Hepperla, Emerson Climate Technologies Retail Solutions InCREASED SAVInGS Mitsubishi's VRF technology enables less energy use. Photos by Terence Roberts

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