Machinery

EPAdis

ECO-DESIGN OF CENTRIFUGAL PUMPS FOR OPTIMISED USE

APPLYING THE RECOMMENDATIONS OF THE EXTENDED PRODUCT APPROACH (EPA) for centrifugal pumps, EPAdis seeks to optimise the effi ciency of the pump, motor and drive assembly. The aim is to demonstrate the scope for improvement in the performance of motor-pump assemblies, including alternative frequency variators and motors to the squirrel cage induction motors normally used. This would lead to increased added value of the product, while the end-user company would achieve a consumption reduction and therefore, cost improvement and reduced emissions. Moreover, this improvement brings forward the application criteria of the Commission Regulation (EU) 2019/1781 effective from 1st July 2023, with the obligation to include IE4 motors in the 75-200 kW working range.

EMICA is a company dedicated to the manufacture and marketing of centrifugal pumps, which has its own patents and in-house maintenance and service workshops.

EMICA PUMPS
OBJECTIVES
  • Reduce environmental impact and cut energy costs under the EPA concept.
  • Demonstrate substantial performance improvement of “EPA-designed” assembly versus current pump+engine units in operation.
  • Encourage investment to include frequency converters in new and existing pump units.
RESULTS
  • Proven compatibility of permanent magnet motors with pump-motor units.
  • The results vary greatly depending on operating conditions. In the most favourable case, with a load profi le defi ned according to Blauer Engel and a 110 kW motor, energy consumption was reduced by up to 50 %.
  • Environmental impact reduction by 48% in single score and 51% in tonnes of CO2e.
CONCLUSIONS
  • The use of pump-motor units with permanent magnet motors and frequency inverters is recommended for centrifugal pump units.
  • The proposed permanent magnet motors provide increased efficiency to IE4 levels, reducing the housing size and weight, without considerably increasing pump-motor unit costs.
  • The joint selection of pump, motor and frequency inverter according to the EPA concept helps to avoid the general tendency to oversize motors

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