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Starting in January 2020, the U.S. Department of Energy (DOE) will begin implementing the first ever energy efficiency standards for freshwater rotodynamic (centrifugal and axial flow) pumps. These standards will directly affect pump manufacturers and, to a lesser extent, the pump repair market, while ultimately benefiting end users if the new focus can reduce their energy costs.
Everyone is probably familiar with the impact of energy efficiency efforts on our industry. For electric motors, this has been both a concern and an incentive for innovation. EASA members and manufacturers have been shaped by the governmental and market forces aimed at reducing electrical energy usage. Electric motors are a primary target of these “green” efforts.
But the commercial and regulatory landscape is ever evolving, and the horizon coming into view includes a new focus on pumps and pump systems. The U.S. Department of Energy (DOE) is implementing efficiency standards for rotodynamic pumps (centrifugal and axial flow pumps). The standards will have little effect on the pump repair market, while pump manufacturers are directly affected. But pump efficiency is very different from electric motor efficiency.
Probablemente todo el mundo se encuentra familiarizado con el impacto de los esfuerzos de la eficiencia energética en nuestra industria. Esto ha sido una preocupación y un incentivo para la innovación en los motores eléctricos. Los miembros de EASA y los fabricantes han sido moldeados por las fuerzas gubernamentales y del mercado, destinadas a reducir el uso de la energía eléctrica. Los motores eléctricos son un objetivo primordial de estos esfuerzos "verdes".
Pero el panorama comercial y regulatorio se encuentra en constante evolución y el horizonte que se vislumbra incluye un nuevo enfoque para las bombas y los sistemas de bombeo.
The repair of the various types of pumps represents an important segment of the service center repair market. Electric motors and pumps are the two most widely used industrial machine components.
Although there are two principle pump types (dynamic and positive displacement), this manual focuses on dynamic pumps and the fundamentals of dynamic pump repair. The information it contains will be helpful to both novice and experienced pump repair technicians, to supervisors and managers of pump repair operations, and to customer service and sales personnel who communicate with customers about pump repair issues.
When working with pumps, you are sure to encounter instances where the pump curve is referenced, along with a number of parameters associated with it. A key parameter of the pump curve is the Best Efficiency Point (BEP). This simple concept of an operating point that yields the most efficient operation is not difficult to visualize. For electric motors, efficiency varies with load; the best efficiency being at about 75% load. However, with rotodynamic pumps - which include centrifugal and axial flow pumps - there are four key parameters to be considered, one of which is efficiency. These four parameters are head, flow (aka capacity or volume), power and efficiency.
This 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.
This booklet covers topics such as:
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The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.
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Recommended Practice for the Repair of Rotating Electrical Apparatus
This is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.
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Revised May 2021
The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.
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