Engineered Systems - March 2009 - (Page 57)

Glossary Here are some common abbreviations and terms found in the pages of Engineered Systems. A A/C – air conditioning ach – air changes per hour AE – architectural and engineering; or architect and engineer AFD – adjustable-frequency drive AHJ – authority having jurisdiction AHU– air-handling unit ASD – adjustable-speed drive ASHRAE – American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. ATC – automatic temperature control E EMS – energy management system EPA – U.S. Environmental Protection Agency ERV – energy recovery ventilator P PFPT – prefunctional performance test PM – preventive maintenance PID – proportional, integral, derivative F fpm – feet per minute FPT – functional performance test R rh – relative humidity RFP – request for proposal RFS – request for submittal ROI – return on investment RO – reverse osmosis RTD – resistance temperature detector G gpm – gallons per minute B BACnet – a data communication protocol for building automation and control networks BAS – building automation system bhp – boiler horsepower; also, brake horsepower BMS – building management system BofD – basis of design H HEPA – high-efficiency particulate air HTML – hypertext markup language HTTP – hypertext transfer protocol HWR – hot water return HWS – hot water supply S SA – supply air scfm – standard cubic feet per minute T TAB – testing and balancing TES – thermal energy storage I IAQ – indoor air quality IS – information systems IT – information technology C CAD – computer-aided design cfm – cubic feet per minute CHW – chilled water CMMS – computerized maintenance management system CO2– carbon dioxide COP – coefficient of performance CRAC – computer room air conditioner U UL – Underwriter's Laboratory USGBC – U.S. Green Building Council UV – ultraviolet L LAN – local area network LEED® – Leadership in Energy and Environmental Design, a designation by the U.S. Green Building Council LEED® AP – LEED Accredited Professional V VAV – variable-air volume VFD – variable-frequency drive VOIP – voice-over Internet protocol VSD – variable-speed drive D D-B – design-build db – drybulb DDC – direct digital controls DID – design intent document DOAS – dedicated outdoor air system DOE – U.S. Department of Energy DR – demand response DX – direct expansion M MEC – mechanical, electrical, communication MEP – mechanical, electrical, plumbing MERV – minimum efficiency rating value X XML – extensible markup language O O&M – operations and maintenance oBIX – Open Building Information Exchange OEM – original equipment manufacturer OA – outside air OPR – owner’s project requirements W WAN – wide area network wb – wetbulb wc – water column wg – water gauge Tune into ES-TV ! See what you missed at the 2009 AHR Expo! High-quality videos shot live at the show highlight top HVAC products. Tune into ES-TV online at www.esmagazine.com/ESTV. No registration required! q www.esmagazine.com/ESTV w w w. esmag a zin e. c o m 57 http://www.esmagazine.com/estv http://www.esmagazine.com/estv http://www.esmagazine.com/estv http://www.esmagazine.com

Table of Contents Feed for the Digital Edition of Engineered Systems - March 2009

Engineered Systems - March 2009 Contents Editor’s Note Back2Basics Case In Point Commissioning Building Automation HVACR Designer Tips Application Checklist Teaching An Old School New Tricks Basics For Absorption Chillers A New Haven For Sustainable Schools Glossary Classifieds Advertiser Index Tomorrow’s Environment

Engineered Systems - March 2009

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