DOE-2 Reference Manual Version 2.1 - DOE2.com

H-SCH7 = SCHEDULE THRU JUN 15 (ALL) (1,24) (1. 0)THRU SEP 15 (ALL) (1,24) (0.0)THRU DEC 31 (ALL) (1,24) (1. 0)C-SCH7 SCHEDULE THRU MAY 15 (ALL) (1,24) (0.0)THRU NOV 15 (ALL) (1,24) (1. 0)THRU DEC 31 (ALL) (1,24) (0.0)SP-3 ZONE DESIGN-HEAT-T = 68DESIGN-COOL-T = 78HEAT-TEMP-SCH = H-SCH6COOL-TEMP-SCH = C-SCH6THERMOSTAT-TYPEPROP ORT! ONALTHROTTLING-RANGE = 2SP-4 SYSTEM KeywordKeyword= Value= ValueHEATING-SCHEDULE = H-SCH7COOLING-SCHEDULE = C-SCH7KeywordKeyword= Value= ValueFrom an examination of Fig. IV.l3 and the example input above, itcan be seen that operation in this control mode will require more energythan required for the previously described cases. Not only have theenergy conserving deadband operating periods (when neither heating norcooling is provided) been eliminated, but the system must provide excessheating during cold intermediate season periods that occur after the zonetemperature has been reset upward to reduce cooling load, but before theheating system can be deactivated. This mode of operation is especiallyenergy intensive when used for a constant-volume reheat system, or whensummer humidity control is required because, in those cases, heatingcapability must be maintained throughout the cooling season.For these reasons, retrofit of systems that incorporate this type ofcontrol arrangement generally offers favorable investment potential andsuch retrofit is being implemented, or actively investigated, by manyorganizations and engineers.One, relatively easy to incorporate, method of reducing energy useis to install controls that sense the cooling requirement in each zoneand reset the cooling air supply temperature upward until the warmestzone can be satisfied without the addition of heat. To. simulate thiscontrol strategy, the keyword data entry COOL-CONTROL = WARMEST is addedto the SYSTEM instruction data entry shown in the preceding example.Note however, that summer humidity control, when specified (see keywordMAX-HUMIDITY in SYSTEM-CONTROL subcommand), may override supply airtemperature setback and reduce energy saving benefits.I V.l72 (Revised 5/81)