ABSTRACT
Using a high ef—ciency motor that runs several hours every day over the year Improving the power factor of the equipment or the entire plant to bring it close
to unity Using a variable-frequency drive to match the motor speed with the load
requirement Storing energy when it is available at a lower cost and using it later when it has
higher value Converting the kinetic energy of a moving mass into electricity when braking
(regenerative braking) Selecting the correct rating of the equipment (not oversizing and then using at
light loads)
An energy saving project often requires an initial capital investment, which may be recovered in a few years by a continuing stream of savings in monthly energy bills. We —rst cover the analytical tools to determine the pro—tability of such projects.
