Abstract
Recognition of the energy savings potential in motor driven systems has led to the development of energy efficiency testing and classification standards for motors and end-use equipment (e.g., pumps and fans) and the implementation of minimum energy performance regulations targeting them worldwide. However, these standards and regulations have been limited to components, disregarding the interaction between them. The energy savings achievable by addressing and improving the entire system are potentially much higher in relation to those achievable when considering individual components. Recently, an effort to develop standards in this regard was carried out by standardization bodies (IEC and ISO) leading to the publication of the IEC61800-9 Power Drive System standard series. The paper, in its first part, describes recent evolutions in electric motor energy-efficiency standards and in the implementation of related regulations worldwide. In the second part of the paper, using the latest energy efficiency test and classification standards, a comparative analysis of different energy-efficient motor technologies is presented. Using results from laboratory tests combined with data provided by manufacturers, different power drive systems are compared considering different operating points in two typical pumping systems. Estimated economic savings from a total cost of ownership perspective are presented.
Highlights
The International Energy Agency (IEA) states that energy efficiency alone could provide more than 40% of the reduction in greenhouse gas emissions required by 2040 to reach the climate goals and be in line with the Paris Agreement [1].In the industrial sector, the largest potential for reduction in electricity consumption and corresponding emissions results from improving the efficiency of electric motors and end-use devices, as well as the use of better system/process control strategies
Motors equipped with variablespeed speed drives drives (VSDs) are expected to reach over 50% of all sold motors leading to significant energy savings for applications that benefit from partial speed operation
The power losses the and the efficiency of the Power Drive System (PDS) was measured at the eight standardized load points defined in the same efficiency of the PDS was measured at the eight standardized load points defined in the same standard
Summary
The International Energy Agency (IEA) states that energy efficiency alone could provide more than 40% of the reduction in greenhouse gas emissions required by 2040 to reach the climate goals and be in line with the Paris Agreement [1]. The largest potential for reduction in electricity consumption and corresponding emissions results from improving the efficiency of electric motors and end-use devices (e.g., pumps and fans), as well as the use of better system/process control strategies. In industry, electric motor systems account for 70% of the electricity demand [2]. The acknowledgement of this potential major contribution has led to the introduction of regulations imposing minimum energy efficiency levels for new electric motors in all major economies. 5, 20 minimum energy performance standards (MEPS) adopted worldwide for electric motors can be seen
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