A Comprehensive Study of Energy-Saving Strategies Through Combined Throttling
DOI:
https://doi.org/10.13052/ijfp1439-9776.2511Keywords:
Pneumatics, Energy Savings, Sustainable Systems, Compressed Air Savings, Pressure ControlAbstract
In the field of pneumatic automation, downstream throttled pneumatic drives are widely adopted for motion tasks, valued for their cost-effectiveness, durability, and high-power density. However, this switching scheme is often regarded as being inefficient. Consequently, many researchers have focused on developing more efficient control strategies. In this paper a novel combined throttling scheme aimed at reducing air consumption is investigated. The paper offers a comprehensive overview of the design methodology and simulative analysis. A subsequent prototypical realization demonstrates the feasibility and function of the novel system with two distinct shut-off variants. In this way, the theoretical design methodology was validated by experimental results. The presented compressed air savings are adjusted to changes in cycle time, providing an objective evaluation in comparison to state-of-the-art system. The findings show a significant reduction in normalized air consumption with the novel circuit for selected load cases. The main characteristics and potential of the combined throttling approach are highlighted, thus facilitating the assessment of its viability in practical applications through a deeper understanding of the system.
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References
Festo Corporation, “Pneumatic Sizing”, accessed December 5, 2023, https:/www.festo.com/eap/en-us_us/PneumaticSizing/.
Emerson Corporation, “Numasing”, accessed December 5, 2023, https:/www.asco.com/en-us/Pages/calculators-numasizing.aspx.
M. Doll, R. Neumann, O. Sawodny, ‘Dimensioning of pneumatic cylinders for motion tasks’, International Journal of Fluid Power, 16(1): 11–24, 2015.
M. Doll, ‘Optimierungsbasierte Strategien zur Steigerung der Energieeffizienz pneumatischer Antriebe’, Dissertation University of Stuttgart, 2016.
A. Raisch, O. Sawodny. ‘Analysis and optimal sizing of pneumatic drive systems for handling tasks’, Mechatronics, 59: 168–177, 2019.
P. Harris, S. Nolan, G. E. O’Donnell. ‘Energy optimisation of pneumatic actuator systems in manufacturing’. Journal of Cleaner Production, 72:35–45, 2014.
J. Hepke, J. Weber, ‘Energy saving measures on pneumatic drive systems’ 13th Scandinavian International Conference on Fluid Power, 092: 475–483, Linköping, Sweden, June 3–5, 2013.
G. Harimoto, M. Senoo, Y. Fujiwara, ‘Fluid Circuit of Air Cylinder’, Patent US 11,118,606 B2, 2021.
J.J. Cummins, S. Thomas, C.J. Nash, S. Mahadevan, D.E. Adams, E.J. Barth, ‘Experimental Evaluation of the Efficiency of a Pneumatic Strain Energy Accumulator’, International Journal of Fluid Power, 18(3): 167–180, 2017.
D. Müller, et al., ‘Energy Efficient Pneumatics: Aspects of Control and Systems Theory’, International Journal of Fluid Power, 23 (3): 299–342, 2022.
M. Novakovic, et al., ‘Impact of Capturing Used Air on the Dynamics of Actuator Drive’, Control Engineering and applied informatics, 17 (2): 82–89, 2015.
E. Rakova, J. Hepke, J. Weber, ‘Comparison of Methods for the Investigation on the Energetic Behaviour of Pneumatic Drives’, 9th International Fluid Power Conference (IFK), 1: 116–127, Aachen, March 24–26, 2014.
T.J. Gibson, E.B. Barth, ‘Design, Model, and Experimental Validation of a Pneumatic Boost Converter, Journal Dynamic Systems, Measurement and Control, 141(1): 011004, 2019.
S. Merkelbach, H. Murrenhoff, ‘Turning challenges into opportunities in the data center’, Symposium on Fluid Power and Motion Control, Chicago, USA, October 12–14, 2015.
M. Heitmann, T. Hergenröther, ‘Fluidrückführvorrichtung für einen doppeltwirkenden Zylinder und Verfahren zum Betreiben eines solchen Zylinders’, Patent DE 10 2019 121 433 A1, 2019.
M. Heitmann, F. Rein, ‘Energy efficiency in pneumatics with the ’Air Saving Box’: the revolutionary plug & play solution from SMC’, 12th International Fluid Power Conference (IFK), Dresden, Germany, October 12–14, 2020.
P. Harris, S. Nolan, G. O’Donnell, ‘Energy optimization of Pneumatic Actuator Systems in Manufacturing’, Journal of Cleaner Production, 259–270, 2014.
A. Raisch, S. Hülsmann, O. Sawodny, ‘Saving Energy by Predictive Supply Air Shutoff for Pneumatic Drives’, Proceedings of the European Control Conference (ECC), 965–970, Limassol, Cyprus, June 12–15, 2018.
M. Doll, O. Sawodny, ‘Energy Optimal Open Loop Control of Standard Pneumatic Cylinders’, 7th International Fluid Power Conference (IFK), 4: 256–270, Aachen, March 22–24, 2010.
M. Doll, R. Neumann, O. Sawodny, ‘Energy Efficient Use of Compressed Air in Pneumatic Drive Systems For Motion Tasks’, International Conference on Fluid Power and Mechatronics (FPM), 340–345, Beijing, China, August 17–20, 2011.
D. Rager, M. Doll, R. Neumann, M. Berner, ‘New programmable valve terminal enables flexible and energy-efficient pneumatics for Industry 4.0’, 11th International Fluid Power Conference (IFK), Aachen, 2018.
R. Neumann, D. Rager, M. Doll, ‘Verfahren zum Betreiben einer Ventileinrichtung, Ventileinrichtung und Datenträger mit einem Computerprogramm’, Patent DE 10 2016 206 821 A1, 2016.
Festo Corporation, ‘Energieeffizienz@Festo’, White Paper, 25, 2014
D. Šešlija, S. Dudić, I. Milenković, ‘Cost Effectiveness Analysis of Pressure Regulation Method on Pneumatic Cylinder Circuit’, International Energy Journal, 17 (2): 89–98, 2017.
O. Reinertz, K. Schmitz, ‘Optimized Pneumatic Drives through Combined Downstream and Adaptive Upstream Throttling’, Symposium on Fluid Power and Motion Control (FPMC), Bath, United Kingdom, September 9–11, 2020.
C. Reese, O. Reinertz, K. Schmitz, ‘Energy Savings through Adaptive Upstream Throttling and Supply Shut-Off on Downstream Throttled Drives’, Chemical Engineering and technology, 46: 137–146, 2022.
O. Reinertz, K. Schmitz, ‘Gasbetriebenes Antriebssystem und Verfahren zum Betrieb’, Patent WO2022049298A1, 2022
F. Nazarov, J. Weber, ‘Sensitivity Analysis and Robust Optimization of an Integrated Pneumatic End-Position Cushioning’, 13th International Fluid Power Conference (IFK), Aachen, Germany, pp. 974–988, June 13–15, 2022.
P. Beater, ‘Pneumatic drives: System Design, Modelling and Control’, Springer Verlag, Berlin, 2007.
Festo Corporation, ‘Cylinder signal generator PPL’, Product data sheet, 2023.
Parker Corporation, ‘Parker Legris, Fluid System Connectors’, Product catalogue, 123-124, Otsego, USA, 2023.
O. Ohligschläger, ‘Pneumatische Zylinderantriebe – thermodynamische Grundladen und digitale Simulation’, Dissertation, RWTH Aachen, 1990.
J. Falcao Carneiro, F. Gomes de Almeida, ‘Reduced-order thermodynamic models for servo-pneumatic actuator chambers’, Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering 220(4): 301–314, 2006.
M. Göttert, ‘Bahnregelung servopneumatischer Antriebe’, Dissertation, Universität Siegen, 2004
International Standard, ‘ISO 6358-1: Pneumatic fluid power – Determination of flow-rate characteristics of components using compressible fluids – Part 1: General rules and test methods for steady-state flow’, 2013.
International Standard, ‘ISO 6358-3: Pneumatic fluid power – Determination of flow-rate characteristics of components using compressible fluids – Part 3: Method for calculating steady-state flow-rate characteristics of systems’, 2014.
D. Leith, W.E. Leithead, ‘Survey of gain-scheduling analysis and design’, International Journal of Control, 73(11): 1001–1025, 2010.
