ENERGY AND EXERGY EFFICIENCIES IN INDUSTRIAL PUMPS

Abstract

In this paper, pumps of an industrial facility have been
examined according to the energy and exergy efficiency.
For this purpose; flow rate, pressure and temperature data
have been measured for each pump under operating and
maximum loading conditions. Additionally, applied
electrical power on electric motors have been measured.
The efficiencies of existing pumps and electric motors
have been calculated by using measured data. As a result,
maximum energy efficiency is estimated as 0.82 for
number 5 tower pump system and maximum exergy
efficiency is 0.23 for number 3 central pump system.
Potential saving opportunities have been determined by
taking into account the results of the calculations for each
pump and electric motor. As a result, the required
improvements, investment potential for these
improvements and simple payback periods have been
determined for each system. Determined main saving
opportunities are: replacement of the existing low
efficient pumps with more efficient new pumps, the
maintenance of the pumps that their efficiencies started
to decline at certain range, the replacements of the
electric motors, had been chosen in higher capacity, with
electric motors which has more suitable operating power
for the system pumps, the usage of high efficient electric
motors.