Consider optimising the transmission
efficiency of your motors by using synchronous belts instead of V-belts.
V-belts can slip and deteriorate efficiency at higher loads.
Consider Getting New Technology
Most motors turn at
nearly constant speed. However, much of the time the devices they drive may
operate at less than maximum design speed. This speed reduction can be
accommodated by an Adjustable Speed Drive (ASD) that varies the shaft speed to
the driven load. Slowing a pump or fan in this manner reduces energy
consumption much more effectively than allowing the motor to run at constant
speed and then restricting or bypassing the flow with a valve or damper.
The newest and most
efficient adjustable speed drive is the variable frequency drive (VFD), sometimes
called a Variable Speed Drive (VSD). A VFD consists of an electronic power
converter that converts constant frequency AC (alternating current) power input
into a variable frequency output. The AC motor speed varies in proportion to
the drive output frequency.
most common applications of ASDs are for pumps and fans to balance flows
and meet changing system needs. For example, ASDs can be very cost-effective in
retrofit or new construction of HVAC systems. Many HVAC systems were designed
with constant flow pumps and fans that are throttled to meet changing operating
conditions. ASDs are also useful for loads such as elevators, water and
wastewater pumps, boiler fans, cooling towers, cranes and conveyors. The speed
range, required precision of speed control, and required torque at lower speeds
dictate the type of ASD needed.
Performance/Costs: Savings from
ASDs come from reduced load of the fan, pump, or driven device. With fans and
pumps, power consumed is proportional to the cube root of shaft speed. If shaft
speed is reduced by 10%, flow is reduced by 10%, while power consumption is
reduced by 27%. If speed is reduced by 20%, power is reduced by
49%. Compared to throttling as a means of flow control, speed
reduction provides dramatic energy savings. Throttling to reduce flow in a fan
or pump backs the device up on its operating curve, increasing pressure and
often increasing power consumption.