DOE-2 Reference Manual Version 2.1 - DOE2.com

U-namePLANT-EQUIPMENTTYPESIZEAny unique user-defined name may be entered to identify thisinstruction, but none is required.This command word informs the PDL Processor that the data tofollow will specify plant equipment. If at least one PLANT­EQUIPMENT instruction is not entered, the PLANT program willgenerate an error message.is a code-word selected from Table V.2 that identifies thetype of equipment to be used in the simulation calculations.(For circulating pumps, see PLANT-PARAMETERS instruction andexplanation for the 10 keywords associated with pumps.).is the nominal rated output capacity, expressed in units ofone million Btu's per hour (MBtu) for the item of equipmentbeing specified. For example, a 100-ton chiller should bespecified as SIZE = 1.20 since the conversion factor is12,000 Btu/hr-ton. A ten million Btu/hr boiler is specifiedas SIZE = 10.0. A 10,000 gallon hot water tank withHTANK-T-RANGE = 180"F (see ENERGY-STORAGE instruction) isspecified as SIZE = 15.0.The SIZE of a storage tank is the useful capacity, i.e.,SIZE = (size in gallons) * 8.34 lb/gal * 10- 6 MBtu/lb-oF * DT,where DT = HTANK-T-RANGE or CTANK-T-RANGE. The definitionsof these last two keywords are found under the ENERGY-STORAGE command.If SIZE = -999 is entered, the PLANT program will automaticallysize, in accordance with peak load, the followingtypes of equipment: all bOilers, chillers, towers, anddiesel and gas electric generators. Steam turbine generatorswill not be automatically sized.Hot water and chilled water circulation pumps are alwaysautomatically sized by the PLANT program. The flow rate,electrical power, and heat gain are calculated from thevalues of PLANT-PARAMETERS keywords as follows:Flow rate:= Design-LoadX-DESIGN-T-DROP x 60 min/h x 8.34 Btu/gallon- FPower:X-HEAD x GPM px 0.643 Btu-min/ft-gallon-hrElect p= -----,TTo~~~~,,"'~~""~-----­X-MOTOR-EFF x X-IMPELLER-EFFV.11 (Revised 5/81)