Synchronreluktanz-Motorspindeln in Werkzeugmaschinen*/Synchronous reluctance motor spindles in machine tools – Energy-efficient drives increase accuracy and reduce cooling requirements of machining centers

2019 ◽  
Vol 109 (01-02) ◽  
pp. 72-80
Author(s):  
M. Weber ◽  
M. Helfert ◽  
F. Unterderweide ◽  
E. Abele ◽  
M. Weigold
Keyword(s):  
Thermal Management ◽  
Energy Efficient ◽  
Machine Tools ◽  
Production Management ◽  
Energy Savings ◽  
Cooling System ◽  
Holistic View ◽  
Synchronous Reluctance Motor ◽  
Management Technology ◽  
Reluctance Motor

Im Rahmen des vom Bundesministerium für Wirtschaft und Energie (BMWi) geförderten Projekts „ETA-Fabrik“ am Institut für Produktionsmanagement, Technologie und Werkzeugmaschinen (PTW) der Technischen Universität Darmstadt konnte die Energieeffizienz von Motorspindeln als Hauptenergieverbraucher von Werkzeugmaschinen durch Einsatz der Synchronreluktanztechnologie gesteigert werden. In der Konsequenz ergeben sich weitere Energieeinsparpotenziale und produktionstechnische Vorteile durch eine gesamtenergetische Betrachtung der Werkzeugmaschine mit Kühlsystem und intelligentem Spindelthermomanagement.   As part of the ‘ETA-Fabrik’ project funded by the BMWi, the Institute of Production Management, Technology and Machine Tools (PTW) of the TU Darmstadt has used synchronous reluctance drives to increase the energy efficiency of motor spindles as main energy consumers of machine tools. Subsequently, new opportunities for energy savings and advantages for the manufacturing process arise by taking a holistic view on machine tools including the cooling system, proposing an intelligent spindle thermal management.

Phasenwechselmaterialspeicher zur Lastflexibilisierung von Werkzeugmaschinen/Phase change material accumulator for energy flexibility of machine tools

2020 ◽  
Vol 110 (05) ◽  
pp. 346-353
Author(s):  
Mark Helfert ◽  
Adrian von Hayn ◽  
Jonas Wendt ◽  
Leon Dungs ◽  
Matthias Weigold
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Machine Tools ◽  
Production Management ◽  
Renewable Energy Sources ◽  
Industrial Processes ◽  
Energy Sources ◽  
Management Technology ◽  
Funded Project ◽  
Change Material

Im Rahmen des vom BMWi geförderten Projekts „Phi-Factory“ am Institut für Produktionsmanagement, Technologie und Werkzeugmaschinen (PTW) der Technischen Universität Darmstadt wurden, angesichts des steigenden Anteils fluktuierend einspeisender Stromerzeuger, technische Potenziale zur energetischen Flexibilisierung von Produktionsanlagen und Industrieprozessen untersucht. Im Bereich der Kühlung von Werkzeugmaschinen bietet der Einsatz von innovativen Phasenwechselmaterialspeichern die Möglichkeit, Lastflexibilisierung auf Maschinenebene umzusetzen, ohne den Fertigungsprozess zu beeinflussen. Zur experimentellen Untersuchung dieser Speicher wurde ein Demonstrator aufgebaut an dem ein parallel entwickelter „digitaler Zwilling“ validiert wurde.   Within the framework of the BMWi-funded project „Phi-Factory“ at the Institute for Production Management, Technology and Machine Tools (PTW) of the Technical University of Darmstadt, technical potentials for the energetic flexibilization of production plants and industrial processes were investigated in view of the increasing share of renewable energy sources. In the field of cooling of machine tools, the use of innovative phase-change material storage systems offers the possibility of implementing energy flexibility at machine level without influencing the production process. For the experimental investigation of these storages, a demonstrator was built on which a parallel developed „digital twin“ was validated.

scholarly journals Feasibility Study of Direct-on-Line Energy-Efficient Motors in a Pumping Unit, Considering Reactive Power Compensation

Mathematics ◽  
2021 ◽  
Vol 9 (18) ◽  
pp. 2196
Author(s):  
Vadim Kazakbaev ◽  
Safarbek Oshurbekov ◽  
Vladimir Prakht ◽  
Vladimir Dmitrievskii
Keyword(s):  
Permanent Magnet ◽  
Energy Efficient ◽  
Reactive Power ◽  
Economic Effect ◽  
Payback Period ◽  
Line Energy ◽  
Synchronous Reluctance Motor ◽  
Reluctance Motor ◽  
On Line ◽  
The Cost

The paper compares the economic effect of using capacitors in fixed speed drives of a pumping station when using energy-efficient motors of various types. Induction motors of IE2 and IE3 energy efficiency classes, a direct-on-line synchronous motor with a permanent magnet in the rotor, and a direct-on-line synchronous reluctance motor are considered. The comparison takes into account not only the efficiency of the motors, but also their power factor, on which the losses in the cable and transformer depend. The possibility of using static capacitors to compensate for the reactive power of motors and reduce the losses is also considered. The feasibility analysis takes into account that the motors have different initial costs. The cost of capacitors is also taken into consideration. The analysis shows that the use of static capacitors can have a significant impact on the comparison between different motors in this application. Without considering capacitors, the permanent magnet motor has the shortest payback period, otherwise the synchronous reluctance motor has the shortest payback period.

scholarly journals Experimental Investigation of a Direct Evaporative Cooling System for Year-Round Thermal Management with Solar-Assisted Dryer

2020 ◽  
Vol 2020 ◽  
pp. 1-24
Author(s):  
Sujatha Abaranji ◽  
Karthik Panchabikesan ◽  
Velraj Ramalingam
Keyword(s):  
Experimental Investigation ◽  
Energy Consumption ◽  
Thermal Management ◽  
Energy Efficient ◽  
Cooling System ◽  
Evaporative Cooling ◽  
Water Evaporation ◽  
Direct Evaporative Cooling ◽  
Evaporative Cooling System ◽  
Building Cooling

Building cooling is achieved by the extensive use of air conditioners. These mechanically driven devices provide thermal comfort by deteriorating the environment with increased energy consumption. To alleviate environmental degradation, the need for energy-efficient and eco-friendly systems for building cooling becomes essential. Evaporative cooling, a typical passive cooling technique, could meet the energy demand and global climatic issues. In conventional direct evaporative cooling, the sensible cooling of air is achieved by continuous water circulation over the cooling pad. Despite its simple operation, the problem of the pad material and water stagnation in the sump limits its usage. Moreover, the continuous pump operation increases the electrical energy consumption. In the present work, a porous material is used as the water storage medium eliminating the pump and sump. An experimental investigation is performed on the developed setup, and experiments are conducted for three different RH conditions (low, medium, and high) to assess the porous material’s ability as a cooling medium. Cooling capacity, effectiveness, and water evaporation rate are determined to evaluate the direct evaporative cooling system’s performance. The material that replaces the pump and sump is vermicompost due to its excellent water retention characteristics. There is no necessity to change material each time. However, the vermicompost is regenerated at the end of the experiment using a solar dryer. The passing of hot air over the vermicompost also avoids mould spores’ transmission, if any, present through the air. The results show that vermicompost produces an average temperature drop of 9.5°C during low RH conditions. Besides, vermicompost helps with the energy savings of 21.7% by eliminating the pump. Hence, vermicompost could be an alternate energy-efficient material to replace the pad-pump-sump of the conventional evaporative cooling system. Further, if this direct evaporative cooling system is integrated with solar-assisted drying of vermicompost, it is possible to provide a clean and sustainable indoor environment. This system could pave the way for year-round thermal management of building cooling applications with environmental safety.

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