DOE-2 Reference Manual Version 2.1 - DOE2.com

hourly values in the referenced DAY-SCHEDULE should be specified as 0). Ifnatural ventilation for purposes of cooling is not done, one of two actionswill occur, (1) if the calculated control ZONE temperature is within itscooling THROTTLING-RANGE, the cooling source cycles on, or (2) if thecalculated control ZONE temperature is within the dead band, the SYSTEM isturned off. If the user does not specify VENT-TEMP-SCH and an associatedSCHEDULE, it will default to the temperature at the top of the heatingTHROTTLING-RANGE in the control ZONE. The simulation theory and an exampleinput can be found in the SYSTEM-AIR section of this chapter. Increasing thespread between the set points would further increase the possibility forcooling by natural ventilation.Example:Heat Pump, subZONEfor RESYSHeaters, and NaturalThe user has chosen to supply additional heating in the sub ZONEs withbaseboard heaters. These heaters are controlled by the user input forHEAT-TEMP-SCH (in the subZONEs). For the best control set BASEBOARD-CTRL =THERMOSTATIC.Procedure:(1) Specify SYSTEM-TYPE = RESYS in the SYSTEM command.(2) Specify HEAT-SOURCE = HEAT-PUMP in the SYSTEM command.(3) Specify COOL-TEMP-SCH in the ZONE-CONTROL subcommand and anassociated SCHEDULE with hourly values of desired ZONE temperaturefor cool ing in the control ZONE. The ZONE chosen as the controlZONE should be the one that is the easiest to heat in the winter andthe hardest to cool in the summer. If this criterion is not met, itwill be impossible for the subZONE baseboard heaters to maintaintemperature control in the subZONEs. If the user does not specify aCOOL-TEMP-SCH for the control ZONE, no ZONE will be cooled.(4) Specify HEAT-TEMP-SCH in the ZONE-CONTROL subcommand and anassociated SCHEDULE with hourly values of desired ZONE temperaturefor heati ng for the control ZONE. Speci fy a HEAT -TEMP-SCH for eachsubZONE with baseboard heaters. The specified contr"ol ZONEtemperatures will control the heat pump cycl ing. The specifiedsubZONE temperatures wi 11 be used to modulate the output of thebaseboard heaters. If the user does not specify aHEAT-TEMP-SCH forthe control ZONE, the HEAT-PUMP will not be activated. If the userdoes not specify a HEAT-TEMP-SCH for a subZONE, its baseboardheaters will not be activated.I V.143 (Revised 5/81)