02471oam 2200457 a 450 991070187600332120120926095436.0(CKB)5470000002421346(OCoLC)805251152(EXLCZ)99547000000242134620120807d2012 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierEnergy implications of retrofitting retail sector rooftop units with stepped-speed and variable-speed functionality[electronic resource] /Daniel Studer ... [and others]Golden, Colo. :National Renewable Energy Laboratory,2012.1 online resource (xiii, 56 pages) color illustrations, color mapNREL/TP ;5500-51102Title from title screen (viewed on Aug. 7, 2012)."April 2012.""This report was prepared by the National Renewable Energy Laboratory (NREL) Center for Electricity, Resources, and Building Systems Integration."Includes bibliographical references (page 34).Commercial retailers understand that retrofitting constant-speed RTU fan motors with stepped- or variable-speed alternatives could save significant energy in most U.S. climate zones. However, they lack supporting data, both real-world and simulation based, on the cost effectiveness and climate zone-specific energy savings associated with this measure. Thus, building managers and engineers have been unable to present a compelling business case for fan motor upgrades to upper management. This study uses whole-building energy simulation to estimate the energy impact of this type of measure so retailers can determine its economic feasibility.Evaporative coolingResearchAir conditioningEnergy conservationStores, RetailEnergy conservationEvaporative coolingResearch.Air conditioningEnergy conservation.Stores, RetailEnergy conservation.Studer Daniel1393500National Renewable Energy Laboratory (U.S.)SOESOEOCLCOGPOBOOK9910701876003321Energy implications of retrofitting retail sector rooftop units with stepped-speed and variable-speed functionality3471604UNINA