What is Swsi and DWDI?
SWSI is single inlet/outlet. DWDI is double inlet / single outlet. We use fan software and curve data to calculate the needed airflow and static pressure to suit the best fan size.
What is an Swsi fan?
BC-SW:Flat-Blade Backward Inclined Centrifugal Fan, SWSI Wheels are constructed of steel using flat single thickness blades, solid welded to the rim and backplate. The inlet-side rim is designed as a proper companion for the inlet cone.
What is Swsi centrifugal fan?
SWSI Centrifugal. Fan. Casings and impellers are made of high strength fully welded mild steel. Controlled with VSD which eliminates the need for high maintenance belt and pulley system. VSD can be factory pre-configured to suit application, creating a time saving plug and play system.
What is difference between Sisw and DIDW fan?
The performance is quite simple: a DIDW Fan gives the same pressure rise but double the flow of a single inlet single width (SISW) fan.
What is DIDW?
DIDW Fans (DOUBLIE INLET DOUBLE WHEELS FANS) These fans are used for relatives high flow and low pressure application and runs at lower rpm. Eminent Systems DIDW Fans are available in both backward and forward curve design. DIDW blowers are greater in width as compared to SISW (Single inlet single wheel) Fans.
How do plenum fans work?
A plenum fan consists of a centrifugal fan wheel without the surrounding housing. The fan wheel pressurizes the surrounding plenum, allowing air to discharge in multiple directions.
What is Sisw fan?
SISW & DIDW Low pressure Centrifugal blower/ Fans Impellers with different design like backward curved, backward inclined, forward curve & airfoil blades design. Air flow Range. : 1000 CMH to 200000 CMH.
What is a single inlet single width centrifugal fan?
Compact and powerful, for large volumes of air in small spaces. Single inlet fans with forward blade impeller are directly coupled to the external rotor motor. With their compact and robust design, they are used wherever a large volume of air must be moved in a confined space.
Is a plenum fan a centrifugal fan?
What are EC fans in Ahu?
EC plug fans provide a compact and high efficiency solution for air handling units. The high performance impeller, motor and electronics system are all optimally adjusted to one another, leading to an overall efficiency of well above 60%.
How many types of AHU are there?
There are two main types of air handling unit — the ‘blow-through’ and the ‘draw-through’. The blow-through AHU has a fan which blows the air through the mixing box, cooling coil and filters before it goes to the ducting network. The draw-through AHU can be vertical or horizontal.
How do EC fans work?
EC fans are powered by 240 or 415 Volt AC electricity supply, which is converted to DC power by the motor’s electronics. EC motors can be up to 30% more efficient than Induction motors, largely because the secondary magnetic field comes from permanent magnets rather than copper windings.
What is PAC unit in HVAC?
Precision Air Conditioning (PAC) system controls the environment, providing a constant temperature and humidity conditions for sophisticated, expensive and sensitive electronic equipment throughout the year.
What is CFM in air handling unit?
Cubic Feet Per Minute (CFM) is a measurement of airflow volume, determined by how many cubic feet of air pass by a stationary point in one minute. Larger homes circulate more air (since there’s more space for it to move around), so they will have a higher CFM.
Are EC motors more efficient?
Energy Efficiency Electronically commutated EC motor efficiency is often above 90%, allowing EC fans to consume up to 70% less energy, when compared to conventional fans. By adjusting an EC motor’s speed to match the demand, the potential for energy savings continues to grow.
Can EC motors run 3 phase?
The most common are: 1) Shaded pole, smaller fractional hp, with low torque; 2) capacitor run and capacitor start motors, both requiring an additional capacitor to operate; 3) three phase motors which run on three phase supply voltage. EC motors are brushless DC motors with external electronics.