DOE-2 Reference Manual Version 2.1 - DOE2.com

DUCT-AIR-LOSSDUCT-DELTA-TMAX-OA-FRACTIONVENT-TEMP-SCHNATURAL-VENT-ACis the fraction of the supply air that is lost from theductwork, thereby diminishing the design supply air at thezones. This keyword should not be used unless the air islost from the building.is the temperature decrease in the hot ducts and the temperatureincrease in the cold ducts caused by imperfect insulationof the ducts. The program assumes that this sameconstant temperature change occurs in both hot and coldducts. A positive value should be specified for both hotand cold ducts. This keyword should not be used unless heatis lost, or gained, from contact with conditions outside thebuilding. A value of less than 1°F is suggested becausethis value is used for all hours of the year.is the upper limit on the outside air quantity allowed whenthe temperature- or enthalpy-controlled economizer is operating,expressed as a fraction of the supply air quantity.This keyword should be used only if the outside dampers donot allow 100 percent outside air.accepts as input the U-name of a schedule that provides thehourly minimum temperature set point for the naturalventing algorithm. This keyword is appropriate to RESYSonly. The hourly values that should be specified in theSCHEDULE referenced by VENT-TEMP-SCH are the indoordry-bulb temperature to which the user would like to coolthrough natural ventilation, in lieu of mechanicalcooling. This hourly temperature is generally below thehourly temperature in the SCHEDULE referred to byCOOL-TEMP-SCH. This latter schedule specifies the zonecooling thermostat set pOint. The windows are assumed tobe closed if the temperature in the room falls below thispOint. If VENT-TEMP-SCH is not specified, all its hourlySCHEDULE values will default to the temperature at the topof the heating THROTTLING-RANGE as defined by HEAT-TEMP-SCH.is the peak number of air changes/hour due to naturalventilation through open windows. This value is constantand is not a function of wind speed. This keyword isappropriate to RESYS only.NATURAL-VENT-SCH is the U-name of a schedule which determines when thewindows can be open vs. when they are always closed. Thehourly values given in the SCHEDULE (and referenced by thiskeyword) are 0, 1, or -1. This keyword is appropriate toRESYS only.A schedule value of zero (0) indicates that the windows arealways closed for this hour.A schedule value of one (1) indicates that the windows willbe opened, for part or all of this hour, only if this providesenough cooling to keep the zone temperature within or belowIV.217 (Revised 5/81)