Thursday, February 9, 2012

ENERGY & SUPERMARKETS

From the Rocky Mountain Institute [rmi.org] the list below comes after a project aimed at creating 
more energy efficient supermarkets with H.E. Butt, based in Texas, and one of the largest supermarket 
companies in the nation.   


These steps are how RMI design recommendations would reduce typical store electricity demand:
  • High-efficiency refrigeration systems—saves up to 18 percent of the store’s total electricity use.
  • Skylights, and high-efficiency interior and exterior lighting—saves 12 percent.
  • HVAC efficiency: chilled water, efficient fans and ductwork, desiccant dehumidifier—saves 10 percent.
  • Radiant heating and cooling—saves 6 percent.
  • Superinsulated walls, tight construction—saves 3 percent.
  • Greatly reduced infiltration at entrances (vestibules)—saves 3 percent.
Potential water savings and waste recovery, though smaller in total expenditures, are even more dramatic on a percentage basis. Water efficiency could reduce consumption by 80 percent:
  • Xeriscaping—saves 28 percent.
  • Low-flow restroom fixtures and sink aerators—save 23 percent.
  • Rooftop rainwater capture and use—saves 11 percent.
  • Kitchen improvements such as portable pressure washers and pre-rinse spray valves—save 5 percent.
  • Reclaiming HVAC condensate—saves 3 percent.

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