; direct-drive plenum fan
with EC motor versus FEG 71 rated impeller; VFD data retrieved from AHRI certification directory in March 2016; 7.5 hp ac motor at nominal efficiency.
"Another popular energy-saving Trane feature is eDrive direct-drive plenum fan
technology, which is up to 20 percent more efficient than traditional forward-curved fans," he adds.
FAN TYPE AIRFLOW FAN WORK ANNUAL WORK (CFM) (W) (KWH) Twin FC Scrolled Fans 10,000 6,833 59,860 Twin AF Scrolled Fans 10,000 5,655 49,535 Belt Drive Plenum Fan 10,000 5,252 46,006 Direct Drive Plenum Fan 10,000 4,939 43,261 FAN TYPE ANNUAL COST ($) Twin FC Scrolled Fans 5,986 Twin AF Scrolled Fans 4,953 Belt Drive Plenum Fan 4,601 Direct Drive Plenum Fan 4,326 TABLE 5 Casing savings.
Optional fan arrangements include airfoil scrolled fans, and belt and direct drive plenum fans. Belt drive units have a drive loss around 2% while direct drive fans will require a VFD that will introduce a drive loss around 2%.
Using a plenum fan
is one method that aids in accomplishing this goal.
The company offers high-quality industrial fans, blowers, and motors including Axial fans, Centrifugal blowers, Plug fans, Box fans, Plenum fans
, Single and Double Inlet fans, with both, AC and EC motors.
A FANWALL is an array of smaller, high-efficiency airfoil plenum fans
. Smaller in size, quieter in operation, and more energy-efficient than the alternatives--and can fit in most service elevators or through standard hallways and doorways.
Their product line includes Centrifugal with single or double inlets, Axial, Plug, and Plenum fans
. All can be built with either AC or EC Motors (ECM).
are popular because of their small space requirements, particularly in direction of airflow and their real-world versatility regarding system effects.
The company offers a wide range of high-quality industrial fans, blowers, and motors including Axial fans, Centrifugal blowers, Plug fans, Plenum fans
, Single and Double Inlet fans, with both AC and EC motors.
the consequence is a fan outlet system effect that adds a significant static effect on fans." The major packaged and custom CRAH manufacturers all offer plenum fans, which eliminates this issue.
Authors: While plenum fans are possible from most manufacturers it is still common to see CRAHs implemented using forward curve fans.