Abstract

In this paper, benefits of energy efficient over standard efficiency motors, in terms of energy saving are evaluated. Today India is facing energy crisis. The industry is the main consumer of energy with the major load component being of motors. Three phase squirrel cage type induction motor is the most commonly used motor in industries in India. Since energy requirements are growing day by the day, it is becoming increasingly important to save energy in industries.Energy conservation reduces the demand.Rice Mill is a potential energy saving area in the State of Punjab. Induction motors being the main energy consumer in this industry offer opportunity of energy saving. Samrala Division of Punjab State has been taken for analysis.A survey had been conducted on 31 Rice-Mills in 7 Sub Divisions of Samrala Division, Punjab. The data included the energy consumption by the existing motors on monthly basis. The load data for the various Rice-Mills of this Division has been taken into account. The parameters associated with the already installed induction motors have been noted for the calculation of efficiency and reactive power requirements. A proposal has been made to replace the conventional induction motor with energy efficient motors. The losses and efficiency of energy efficient motors are calculated and it is compared with already existing conventional motors. In this paper a comparative analysis is done on efficiency and operating cost of Standard Efficiency Induction motors and Energy Efficient motors. The savings resulting with the replacement of Standard Efficiency with Energy Efficient motors are shown. The payback period for the Samrala Division and then for the whole State of Punjab has been calculated. In this paper, a case study showing these benefits has been presented.