Abstract

A significant amount of energy is being expended during different phases of the operation of air compressors in the manufacturing or processing industries. The expended energy comes with its cost implication which consequently contributes to the mammoth operational cost incurred in the smooth running of industries in the face of the current hyperinflation. Against this background, this study aimed to investigate the energy-saving capabilities of different starting methods such as Direct-On-Line (DOL), Star/Delta, and Variable Speed Drive (VSD) for an Atlas Copco AB screw air compressor. Field observations, inspection of the nameplate, and fundamental laws of energy form the backbone of this analysis. The outcome of this research showed that during the starting phase, loading phase and unloading phase the VSD starter achieved significant savings in energy consumed which translated to significant savings in the cost expended in making the air compressor stay in service. The outcomes of this study not only provide a concise guide in selecting the appropriate starting method based on the specific operational requirements and energy-saving objectives for air compressor systems but also highlight the energy-saving potential of VSD during different operational phases