New legislation to force energy efficiency improvements: The next eco-design requirement of EU regulation no. 640/2009 which is part of the implementation of Directive 2005/32/EC, with heightened requirements for electric motors, will come into effect as of 1 January, 2015. This is intended to reduce the energy consumption of pumps and other rotary powered machines throughout Europe. The regulation specifically stipulates that electric motors that are to be brought newly onto the market, in the nominal performance range of 7.5 to 375 kW and intended for operation on the mains, must at least have the IE3 efficiency class. IE2 motors produced before then will only be permitted on the market and operated together with a converter.
From 1 January 2017 this requirement will then also apply to motors that are in the nominal performance range of 0.75 to 7.5 kW. Exceptions to this regulation are submersible and integrated motors whose efficiency cannot be separately determined. Other exceptions apply to motors that have an installation altitude of over 4,000 m or an ambient temperature of less than -30°C or more than 60°C, or if the motor is to be used with the relevant authorisations in potentially explosive areas.
The topic of energy efficiency has been tackled by Herborner Pumpen for a long time. By 2010 the company had already achieved enormous energy savings for Herborner pump types with the use of highly efficient permanent magnet motors (PM motors). The use of IE5 motors has launched a new era of energy efficiency in pump technology: PM motors (permanent magnet motors) of energy class IE5 reduce the losses compared to IE4 motors by a further 20%. In this context the motors improve efficiency by up to 13%. The drives of PM motors require frequency converters, which allow the pumps to be adjusted to existing plant requirements. This makes further energy savings possible. These motors also achieve significant savings compared to asynchronous motors with regard to speed control.
Although submersible motor pumps are not affected by the new directive, these were also taken into account when energy use was scrutinised and developed further by Herborner Pumpen so that the submersible motor series could also be upgraded to IE3. With these motors, the UNIVERS-T- IE3 pumps help the operators achieve significant savings.
Greater performance thanks to higher efficiency, lower operating costs thanks to reduced energy consumption and therefore less CO2 emissions - those are the significant features of the new IE5 motor technology. "The essential advantage of our energy-optimised pumps lies in the considerable increase in efficiency. This gives you higher performance with very low life cycle costs," explained Sascha Korupp, technical manager at Herborner Pumpentechnik. Therefore the investment in new pump technology is also quickly recovered. Depending on the pump performance and operating time, the investment is paid off in less than 1.5 years, and that several times over!