DOE-2 Reference Manual Version 2.1 - DOE2.com

AIR-CHANGES/HRCFM/SQFTRATED-CFMtemperature differential between design supply and zoneconditions. The flow rates so calculated do not account forinterzone heat transfer unless explicitly requested. For amore detailed discussion see Sec. D of this chapter.Note that if the user wishes to input design air flow ratesand not have the program convert them to sea-level rates, theALTITUDE keyword in the BUILDING-LOCATION command in LOADSshould be set to zero.is the design supply air flow rate that is to be given to thezone. It is expressed in terms of the number of times perhour that this flow rate would replace the total volume ofair in the zone. For a discussion of alternative ways tospecify zone air flow rates, see ASSIGNED~CFM.is the design supply air flow rate that is to be given to thezone. It is expressed as the ratio of the design supply airflow rate (in standard, or sea level, cfm) to the total floorarea of the zone. For a discussion of alternative ways tospecify zone air flow rates, see ASSIGNED-CFM.is the nominal capacity of the supply air fan in this zone,as specified by the fan manufacturer. This keyword and itsassoclated value are lnput by the user if he has chosen asupply fan, from the manufacturers' literature, that will beforced to operate above or below its rated capacity to meetthe flow rate of ASSIGNED-CFM (or the flow rate calculated bythe program). The rating is in cfm at standard (sea level)conditions.This over- or under-sized fan may affect other equipment inthe system; therefore, the user should see alsoRATED-HCAP-FCFM, RATED-HEIR-FCFM, RATED-CCAP-FCFM,RATED-CEIR-FCFM, and RATED-SH-FCFM in SYSTEM-EQUIPMENT.Note: Only "zonal" systems (UHT, UVT, TPFC, FPFC, TPIU,FPIU, HP, and PTAC) have a supply air fan in the zone. Forall the central systems the data entry for RATED-CFM, ifnecessary, is input under the SYSTEM-AIR subcommand. If novalue is specified here for "zonal" systems and a value isspecified in SYSTEM-AIR, that value will be used by all zones.Note: The following three keywords are associated with outside ventilationair. Although the specified quantities may be modified by the program for thesake of consistency, the flow of outside ventilation air is an uninterruptedflow as long as the fans are operating.The outside ventilation air quantity is not determined by the design spaceheating or cooling demands (except when an economizer is specified).OUTSIDE-AIR-CFMspecifies the minimum flow rate of outside air (in standard,or sea level, cfm) for the zone. Alternatively, orI V.189 (Revised 5/81)