ASHRAE RP-1547, "C[O.sub.2]-Based Demand Controlled Ventilation for Multiple Zone
HVAC Systems," (6) included a case study of an example university building to compare the performance of these proposed DCV control strategies, plus a reference case (Without DCV) in terms of annual system OA rate and annual energy cost.
The system is ideal for applications and industries involving jacketed vessels, mixers, reactors, multiple zone
processes, sanitary/cleanroom, pharmaceutical/medical, food, chemical and other processes that require both heating and chilling.
If the equation were ignored, this would increase the outdoor air required in multiple zone
systems because the required outdoor air fraction at the air handler would equal the fraction required in the critical zone, with no credit given for the recirculation of unused outdoor air.
There are three types of changes to this procedure between 2007 and 2010: changes to occupancy rates, clarification of the multiple zone
calculations, and additional requirements for demand control ventilation.
Analytics include three-dimensional image stabilization, dynamic image control for various lighting situations, GPS target tracking, multiple zone
management, and direction/velocity detection.
Z Series vertical units are vertically stacked multiple zone
units designed for moderate volume flow and heating/cooling duties.
In the newly developed multiple zone
DCP--MegaVantis Perl Mill, the product successively flows through multiple grinding zones where different grinding and dispersing principles prevail.
One of the keys in attacking a zone defense is multiplicity--utilizing multiple zone
offenses and specials to pick up the pattern of the defense or to get the special shooters their special shots.
Absorbent Article With Multiple Zone
Structural Elastic-like Film Web Extensible Waist Feature: No.
International's Carroll attributes 80% of these sales to "move-up" buyers, computer-savvy consumers who don't need help from sales associates.
This ranges from simple locking handles through multiple zone
lock formats and wireless coded cabinet handles with many options for stand-alone operation, to fully integrated security and environmental monitoring.
Since OA is not directly delivered to each room and is mixed with the recirculating air, the multiple zone
equations contained in ASHRAE Standard 62.1 should be used to determine the OA required at each air handler and to properly determine the total OA flow at the DOAS unit.