AIR SYSTEMS / PROJECT EXPERIENCE
Fan + Duct System Investigation
Measured System Behaviour Did Not Align With The Expected Fan Duty, Indicating That The Fan, Branches, Dampers And Connected Duct Resistance Needed To Be Assessed As One Network.
WHAT THE OPERATING POINT MEANS
A Fan Does Not Have One Duty. It Operates Where Its Characteristic Curve Meets The Resistance Of The Connected System.
Measured flow and pressure did not sit on the catalogue duty. Ducts, fittings, branches, dampers and equipment losses were scheduled and summed into an as-found system curve, then compared with a balanced condition.
FAN CURVE / SYSTEM RESISTANCE
REPRESENTATIVE
LOSS GROUP
WHAT IS REVIEWED
WHY IT MATTERS
Straight duct
Length, hydraulic diameter, roughness
Distributed friction
Bends + transitions
Geometry and loss coefficient
Local turbulence and separation
Damper + branches
Position and flow split
Balancing and control loss
Connected equipment
Measured or supplier pressure drop
Often the dominant fixed loss
ENGINEERING DECISION
Balance The Network, Change A Damper Or Correct A Duct Restriction Before Defaulting To A New Fan. Fan Laws Are Used Only Within Their Valid Speed And Density Range, Then Checked Against Measurements And Uncertainty.
HAVE AN ENGINEERING CHALLENGE?
Bring The Problem.
We will confirm the scope before work starts.
We will confirm the scope before work starts.
0433 597 205