Energy efficiency in pumps

• Published in: Energy conversion and management Vol. 49; no. 6; pp. 1662 - 1673
• Main Authors: Kaya, Durmus, Yagmur, E. Alptekin, Yigit, K. Suleyman, Kilic, Fatma Canka, Eren, A. Salih, Celik, Cenk
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.06.2008; Elsevier
• Subjects: Applied sciences; Energy; Energy economics; Energy efficiency; Energy policy; Energy savings; Energy. Thermal use of fuels; Exact sciences and technology; General, economic and professional studies; Materials and auxiliary equipments used in energy engineering; Pump; Rational use of energy: conservation and recovery of energy; Energy efficiency; Pump; Energy savings; Temperature; Flow rate; Electric pump; Pressure; Operating conditions; Efficiency; Energetic efficiency; Electric power consumption; Performance; Investment
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2007.11.010

In this paper, “energy efficiency” studies, done in a big industrial facility’s pumps, are reported. For this purpose; the flow rate, pressure and temperature have been measured for each pump in different operating conditions and at maximum load. In addition, the electrical power drawn by the electric motor has been measured. The efficiencies of the existing pumps and electric motor have been calculated by using the measured data. Potential energy saving opportunities have been studied by taking into account the results of the calculations for each pump and electric motor. As a conclusion, improvements should be made each system. The required investment costs for these improvements have been determined, and simple payback periods have been calculated. The main energy saving opportunities result from: replacements of the existing low efficiency pumps, maintenance of the pumps whose efficiencies start to decline at certain range, replacements of high power electric motors with electric motors that have suitable power, usage of high efficiency electric motors and elimination of cavitation problems.