DOE-2 Reference Manual Version 2.1 - DOE2.com

If, however, the heating, cooling, and electric loads passed fromSYSTEMS are 0.1, 9.5, and 7 MBtuh, respectively, thenPredicted Load; (0.1 x 0) + (9.5 x 0.333) + (7 x 1); 10.16 MBtuh electric.Example 4Now the predicted load falls within the PRED-LOAD-RANGE ; 1000(i.e., 9 to 1000 MBtuh). Therefore, the equipment selected foroperation becomes the heating and electric equipment defined byDEFAULT and the absorption chiller defined by PEAK-SHAVE.Note that the MULTIPLIER should be specified based on the equipmentspecified in first LOAD-ASSIGNMENT keyword (i.e., normally assignedequipment) of the LOAD-MANAGEMENT instruction.The LOAD-MANAGEMENT multipliers in this example are specified topredict electric load. HEAT-MULTIPLIER; 0.0 because it is feltthat the electric load imposed by the heating equipment isnegligible. ELEC-MULTIPLIER; 1.0 because the total SYSTEMSelectric load must be added to the PLANT equipment electric demandwhen the electric load is being managed. And finally, theCOOL-MULTIPLIER; 0.333 is the user's estimate of number of Btu'sof electric energy required for each Btu of cooling. This impliesthat the overall coefficient of performance for the centrifugalchiller and cooling tower combination is 3.0.A 10 MBtuh double-bundle chiller, DBUN, and a 10 MBtuh opencentrifugal chiller, CENT, are specified in a hypothetical PLANTequipment instruction. Even though the double-bundle chiller isless efficient than the open centrifugal chiller, it is capable ofsu'pplying waste heat for space heating. Therefore, the userprefers to operate DBUN whenever the space heating load exceeds 2MBtu. Thus, the user specifiesHTRECOVER ; LOAD-ASSIGNMENTTYPE; COOLINGLOAD-RANGE ; 10PLANT-EQUIPMENT; DB UNNUMBER ; 1NORECOVER ; LOAD-ASS IGN~lENTTYPE; COOLINGLOAD-RANGE ; 10PLANT-EQUIPMENT; CENTNUMBER; 1 ••LOAD-MANAGEMENTHEAT-MULTIPLIER; 1.0COOL-MULTIPLIER; 0.0ELEC-MULTIPLIER ; 0.0V.63 (Revised 5/81)