The dual duct constant air volume simulation or the typical multi-zone is described by this Air Distribution Unit (ADU). Multi-zone systems condition all the air in a central apparatus and distribute it to the conditioned zones through two parallel ducts. One duct carries cold air and the other warm air, providing air sources for both heating and cooling at all times. In each conditioned zone, a mixing valve responsive to a room thermostat mixes the warm and cold air in proper proportions to satisfy the prevailing heating or cooling load of the space.
The total airflow to each room is kept constant while the proportion of hot air to cold air is adjusted to maintain the temperature in each zone at the desired level.
This is a read-only label that is automatically generated by the software and which incorporates the name of the zone in which the ADU is located.
The design constant volume flow rate (in m3/s or ft3/min) specified for the multi-zone ADU.
This is the schedule that determines whether or not the unit is available for each timestep of the simulation. A schedule value greater than 0 (usually 1 is used) indicates that the unit can be on during the timestep . A value less than or equal to 0 (usually 0 is used) denotes that the unit must be off for the timestep .