VAV Temperature

Box VAV is conditional air equipment that through damper allows to control the ticket of air through a duct, this fashion the outflow of air and the temperature of a room. The Air Variable Modular Volume Assembly (VMA) is an integrated module that includes a controller of last generation, a distinguishing sensor of pressure and an actuator with step engine digital. Additionally, a time that the size of box VAV determines its maximum capacity of resfriamen it to you, the performance of a box VAV depends on its correct sizing for the conditional air designer. Some times the size and, therefore, the capacity of a box VAV can adequately not take care of to the thermal demand of the zone the one that it serves. If the box will be very small, will occur insufficient cooling and high level of noise.

If the box will be very great, could be difficult to adequately control the temperature of the zone, a time that a small one opening in damper cause a great change in the air outflow. The boxes must slightly be on-dimensionadas allowing to a quieter operation and a reserve of capacity for eventual increases in the thermal load of the environment. Typically, one sends regards that the maximum outflow of project is limited between 80 and 90% of the capacity of outflow of the box (maximum outflow of the box). Air conditioners normally are controlled from norm ASHRAE, where standards in the processes of control of air-conditional are defined, the variation of the use of external air is what it determines which ASHRAE to use. ASHRAE 1 = all Uses 100% of air-external the time, a heating valve is modulated to keep the temperature of adjustment, in case that the temperature of insufflation to lower very, damper of external air can be closed (with priority way). ASHRAE 2 = is fixed a minimum percentage of use of the air-external one (15 up to 50%), heating valve or damper of air-external they are modulated to keep the temperature of adjustment. .