ENERGY AND EXERGY EFFICIENCIES IN INDUSTRIAL PUMPS

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.