DOE-2 Reference Manual Version 2.1 - DOE2.com

A number of optional features and control strategies can be specified forthis system. The optional features are discussed in Table IV.2 and thesection entitled, "Explanation of System Options" (immediately following TableIV.2). The possible control strategies for this system are discussed in Sec.8.5 of this chapter. It is highly recommended that the user read that portionof Sec. B.5 that is applicable to this system.Table IV.20 shows the commands and keywords that must be entered forsimulation of this version of the system, as well as those that are applicablebut optional (i.e., program uses default value if entry is omitted.)Heat Pump:\ )jI"eo,,)~ WINDOW-ITEMS SHOWN IN DASHED BOXESARE OPTIONAL COMPONENTSThis version of the system, the Residential Air-to-Air Heat Pump, is alsofor a single-zone constant-volume system intended for homes or offices. Therules stated in the first two paragraphs of RESYS system description applyalso to this version of the system. This unit provides forced-air heating andcooling. In its basic configuration the Residential Heat Pump con- sists of acompressor, a four-way valve for reversing the refrigerant flow direction, anair-cooled condenser with fan, an evaporator with fan, a filter (not shown),and a thermostat. The condenser also serves as an evaporator and theevaporator also serves as condenser, depending on whether the unit is in theheating or cooling mode of operation. The supply (indoor air) fan and theoutdoor fan operate in a cycling mode. The unit may be specified with anauxiliary electrical heater. To specify this type of RESYS, specifyHEAT-SOURCE = HEAT-PUMP (plus the other keywords appropriate to a heat pump,if desired).IV.83 (Revised 5/81)