Life Cycle Energy Cost Assessment for Pump Units with Various Types of Line-Start Operating Motors Including Cable Losses

Vadim Kazakbaev, Vladimir Prakht, Vladimir Dmitrievskii, Safarbek Oshurbekov and Dmitry Golovanov
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Vadim Kazakbaev: Department of Electrical Engineering and Electric Technology Systems, Ural Federal University, Ekaterinburg 620002, Russia
Vladimir Prakht: Department of Electrical Engineering and Electric Technology Systems, Ural Federal University, Ekaterinburg 620002, Russia
Vladimir Dmitrievskii: Department of Electrical Engineering and Electric Technology Systems, Ural Federal University, Ekaterinburg 620002, Russia
Safarbek Oshurbekov: Department of Electrical Engineering and Electric Technology Systems, Ural Federal University, Ekaterinburg 620002, Russia
Dmitry Golovanov: Department of Electrical Engineering, University of Nottingham, Nottingham NG7 2RD, UK

Energies, 2020, vol. 13, issue 14, 1-15

Abstract: The paper presents a comparative analysis of life-cycle energy consumption for three different types of 4 kW line-start motors used in a pump unit with throttling: the most widely used induction motor with IE3 efficiency class, line start permanent magnet synchronous motor with IE4 efficiency class and line start synchronous reluctance motor with IE4 efficiency class. The operating cycle for pump units with constant flow is considered for the above-mentioned types of motors taking into account not only the losses in the pump and motor, but also in the power supply cable. It is shown that the line start synchronous reluctance motor without magnets has the highest efficiency over the entire considered loading range. However, its power factor is lower than that of the synchronous motor with magnets and therefore it has more significant losses in power supply cable. Despite this disadvantage, the line-start reluctance motor is a good alternative to widespread induction motor since it allows saving of approximately 4000 euro more than the latter during the 20 years life cycle. It also provides similar savings in comparison to the permanent magnet synchronous motor, but unlike it, it does not have costly rare-earth materials in the rotor.

Keywords: centrifugal pump; energy efficiency; induction motor; line-start synchronous motor; synchronous reluctance motor; throttling control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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