DOE-2 Reference Manual Version 2.1 - DOE2.com

In the example above, the electric utility will supply 20 MBtuh and the dieselgenerator 2 MBtuh if the electric load is 22 MBtuh. If the user wishes tostart the diesel generator and operate it at full load whenever the electricload exceeds 20 MBtuh, then the user specifiesELEC = LOAD-ASSIGNMENTTYPE = ELECTRICALLOAD-RANGE = 20PLANT-EQUIPMENT = UTILITYNUMBER = 20LOAD-RANGE = 30PLANT-EQUIPMENT = DIESEL-1NUMBER = 1 .•The diesel will now satisfy the first 10 MBtuh when the totalelectric load is above 20 MBtuh. The electric utility will, bydefault, supply the rest.Example 3:Two chillers, CENT-CHLR and ABSOR-CHLR, are defined by hypotheticalPLANT-EQUIPMENT instructions to be an open centrifugal and singlestageabsorption chiller, respectively, both capable of producing 10MBtuh. If the user wishes to operate the absorption machine with thecompression unit whenever the cooling load exceeds 10 MBtuh and atthe same time minimize the electric load, the user specifies:CHILLERS = LOAD-ASSIGNMENTTYPE = COOLINGLOAD-RANGE = 10PLANT-EQUIPMENT = CENT-CHLRNUMBER = 1LOAD-RANGE = 20PLANT-EQUIPMENT = ABSOR-CHLRNUMBER = 1PLANT-EQUIPMENT = CENT-CHLRNUMBER = 1 ••Example 4:An open centrifugal chiller named CENT-CHLR and a cold water storagetank named COLD-TANK are defined by hypothetical PLANT-EQUIPMENTinstructions to be capable of producing 10 MBtuh of cooling andstoring 40 MBtu, respectively. In addition, a hypotheticalENERGY-STORAGE instruction permits the delivery of up to 10 MBtu ofcold water per hour from the tank. If the user wishes to supply coldwater from the storage tank whenever the cooling load is greater thanthe capacity of the chiller, the user specifiesV.56 (Revised 5/81)