DOE-2 Reference Manual Version 2.1 - DOE2.com

REPORT SV-A - SYSTEMS DESIGN PARAMETERSThe SV-A Report is produced by the program when the keyword VERIFICATION(SV-A) is used. This report echoes the user's irput to the program asinterpreted by the SYSTEMS design routines. See Section IV.D for discussionof SYSTEMS design calculations.1. SYSTEM NAME in the first line after the header is the U-name (SYST-1) ofthe HVAC system selected by the user.2. SUPPLY FAN (CFM) (5953.) i~ the calculated system design air flow rate.It should be equal to the user-input SUPPLY-CFM multiplied by the valueof ALTITUDE MULTIPLIER. If not user-specified, the value will becalculated from the peak loads. For a corstant volume system or ifSIZING-OPTION = NON-COINCIDENT, the number will be the sum of design cfmsfor the zones on the system. ,If the system is a variable-air-volumesystem, SIZING-OPTION = COINCIDENT, and this is the only system in thePLANT-ASSIGNMENT, the value is calculated from the building coincidentpeak load.3. ELEC (KW) is the electrical energy consumed by the central system supplyfan at design flow. It will be calculated from the value in column 1 andthe user input (or default) for SUPPLY-KW or from the ratio ofSUPPLY-STATIC and SUPPLY-EFF.4. DELTA-T (F) is the value of SUPPLY-DELTA-T, the rise in temperature ofthe air caused by the supply fan.5. The next three entries, RETURN FAN (CFM), ELEC (KW), AND DELTA-T (F) arethe same corresponding values for the return air fan. In the samplereport, these are all zero, because no return fan has been specified.6. OUTSIDE-AIR is the outside air ratio for central systems. Its value iseither the user input value of MIN-OUTSIDE-AIR or is calculated bySYSTEMS from the ventilation input at the zone level divided by the cfmin column 1. This item does not reflect larger values entered, possibly,through the MIN-AIR-SCH keyword, but may be determined from exhaust airentered at the zone level. For zonal systems, this value will be zero.When OUTSIDE AIR is determined from zone ventilation rates, it is the sumof the values under OUTSIDE AIR CFM (in column 6 opposite the zoneU-names) divided by the value under SUPPLY FAN. This outside air ratiois what the program will use as the minimum outside air ratio. It isassumed that the outside air is brought in at the main system fan and isdistributed to the individual zones in proportion to the supply air toeach zone and not in the amount specified by the user.Note: The SYSTEMS design routine does not examine the values entered'inschedules. Consequently, if the user specified the outside air ratiothrough the MIN-AIR-SCH but wants SYSTEMS to size the equipment, heshould also specify a value for MIN-OUTSIDE-AIR.VIr. 53