Energy Efficiency Solutions
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Energy Efficiency Solutions Energy Savings Advisor Application Mobile Drives & Motors Technology Motor & Drive solutions for energy savings and a better environment

Energy Efficiency What is Energy Efficiency? Improved energy efficiency allows businesses to reduce costs and cut emissions in the face of constantly increasing demand for electricity. Energy efficiency is achieved primarily by means of more efficient technologies or processes. Electricity usually represents a significant proportion of a business’s total energy costs. Given the current economic situation, it is ever more important to improve competitiveness by cutting energy costs. Energy efficiency targets and policies Energy efficient buildings, industrial processes and transportation...

To emphasize potential efficiency gains, some supports have been created on a national scale while others have been created for geographical areas. They include incentives, financing and standards. Government tax incentives Individual governments offer a variety of tax credits, rebates and other incentives to support energy efficiency, encourage the use of renewable energy sources, and support efforts to conserve energy and reduce pollution. Standards & directives Various regulations have been introduced and will soon increase to force the manufacture and use of higher efficiency motors. A...

Choosing the highest efficiency solutions Choosing the most suitable solution is not an easy step since different options are available. What are the advantages of variable speed rather than fixed speed? Should we consider induction or permanent magnet motors? The following sections help select the right technology and architecture to achieve your company’s goals for operating expenditure, return on investment (ROI), reliability and serviceability. Fixed speed solutions Fixed Speed motors On applications where the need is nearly constant, fixed speed solutions with a motor connected direct...

Variable speed solutions In applications where need varies throughout the day or year, the impact on energy can be very different depending on the solution you choose. Mechanical regulation vs variable speed The vast majority of fans, pumps and compressors, representing 2/3 of motor energy consumption worldwide, are driven by fixed speed motors connected direct on line. Any necessary variation in system output is generally achieved by throttling or damping the system with a valve or a damper. Replacing mechanical regulation with a motor speed adjustment solution will considerably reduce...

Choice of technology: Induction vs Permanent Magnet Motor When it is necessary to vary the speed of a motor to suit flow requirement, using a permanent magnet (PM) motor results in a major energy saving compared to a standard AC induction motor (IM). At nominal speeds, the efficiency of a permanent magnet motor is significantly higher than any inverter driven induction motor. Below nominal speed, the difference becomes even more important as the efficiency of a permanent magnet motor remains almost constant whereas induction motor efficiency declines...

Focus on centrifugal applications:Focus on constant torque applications: Since at low speeds, absorbed power is very low, the advantage of permanent magnet motors becomes significant when average demand exceeds 60%. Because of the absorbed power being proportional to the speed, the impact of the better efficiency of permanent magnet motors is constant over the entire operating range providing significant additional savings compared to induction motor solutions. Example Application requirements 100 kW - 1,500 rpm nominal - 8,000 h/year VSD AC IM solution: IE2 IMfinity® motor 110 kW +...

Choice of architecture for higher benefits On any given application, requirements can be fulfilled in different ways, each of them providing advantages. The best choice is the one that provides the best possible compromise between important commercial considerations such as energy saving, capex, opex and serviceability. Single large system meeting maximum requirements Multiple variable speed PM in parallel One variable speed IM + multiple fixed speed with alternative feature One variable speed PM + multiple fixed speed

Maximizing energy efficiency with Pumps and Fans Considering an aging installed base that is mainly fitted with old motors and mechanical regulation systems, huge energy savings can be achieved in almost every single application. To contribute to significant energy efficiency improvements, we must appraise and monitor how energy is used and identify specific areas for development. In the majority of cases, it is the complete systems and processes that should be optimized to get maximum savings. Pumping, Ventilation Pumping and ventilation represent one third of the consumption of motorized...

mm v/mnniiiHiimii WJF ^iimunnstsaam\ J ]zss, tfunimsumnid kmmmmmti M fmminiiiiiiin l % www ! An important library built in 1995 welcomes more than 40,000 visitors a year and comprises 14 million books. To protect its valuable collections an extremely reliable air conditioning system had to be implemented. This will also result in a significant reduction of energy costs. Challenge To create a highly efficient, environmentally friendly and reliable air conditioning system by converting it from fixed speed to variable speed without compromising the site’s operations. Former installation 2 x 90...

Compression by itself represents one third of the consumption of motorized systems. Whether it is for air or cold production, compressors are exposed to a large variety of demands where variable speed permanent magnet solutions will provide the highest efficiency as well as the smoothest and most reliable operating conditions. Focus on refrigeration: In a refrigeration plant, energy consumption is by far the largest cost center. During the past 30 years, industrial energy consumption has grown by 186% whereas industrial refrigeration energy consumption has grown by 237%. In addition to the...