Saving Energy by Predictive Supply Air Shutoff for Pneumatic Drives

Raisch, Adrian; Hülsmann, Steffen; Sawodny, Oliver

doi:10.23919/ecc.2018.8550182

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…A comparison of available methods in the literature is presented in Table 7. Raisch et al [86] proposed a solution which involves shutting off the directional control valve in a specific position of the piston during movement. They compared two models to predict valve override and achieved a reduction in compressed air consumption that was twice that of the normal control.…”

Section: Methods Of Expansion Power Utilizationmentioning

confidence: 99%

A Review of Energy Overconsumption Reduction Methods in the Utilization Stage in Compressed Air Systems

Gryboś,

Leszczyński

2024

Energies

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Pneumatic systems use the energy of compressed air to carry out manufacturing automation processes through the implementation of complex handling and motion tasks. However, these systems are energy intensive: it is estimated that pneumatic systems in manufacturing plants consume approximately 10% of all electricity consumed in the industrial sector. At the same time, the energy efficiency of the whole pneumatic system is observed to be 6–10%, due to the compression process, oversizing, and overconsumption. There are numerous solutions in the literature focusing on improving efficiency at the compression stage of utilization; however, for the utilization stage, there is a lack of systematization and grouping of these solutions. The following review will summarize current knowledge about the utilization stage and methods for improving oversizing and energy overconsumption. In addition, a method of exergy analysis for pneumatic systems will be presented, which is a very useful tool to assess the efficiency of these systems.

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Section: Methods Of Expansion Power Utilizationmentioning

confidence: 99%

A Review of Energy Overconsumption Reduction Methods in the Utilization Stage in Compressed Air Systems

Gryboś,

Leszczyński

2024

Energies

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“…In general, the implementation of the air supply cut-off can be based on three different physical principles (see Figure 2): tion even for well-sized cylinders in some cases [25,26,29,31]. b. Position-based.…”

Section: Principles Of Air Supply Cut-offmentioning

confidence: 99%

“…The cut-off time of the air supply is defined solely by programming the switching (cut-off) time of the directional control valves. Several publications discussed the optimal and automated selection of the cut-off time, demonstrating methods to achieve a 60-80% reduction in air consumption even for well-sized cylinders in some cases [25,26,29,31]. b.…”

Section: Principles Of Air Supply Cut-offmentioning

confidence: 99%

Energy Efficiency of Pneumatic Actuating Systems with Pressure-Based Air Supply Cut-Off

Boyko,

Weber

2024

Actuators

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To exploit the energy-saving potential of pneumatic actuator systems, various energy-saving circuits have been developed in recent decades. However, the principle of a pressure-based air supply cut-off has only been considered to a limited extent. This article introduces a possible pneumatic circuit solution for this principle and evaluates it via simulation and measurement of the saving potentials and limits of the developed circuit for typical industrial drive tasks. The conducted investigation shows the suitability of the developed energy-saving circuit, especially for the reduction of the actuator oversizing, achieving energy savings of 71% without performance loss. Conversely, applying this principle to an already well-sized cylinder comes with limitations and requires additional damping. The final economic analysis demonstrates that the application of the circuit could achieve comparatively short amortisation times of approx. 1.9 years for a setup with standard pneumatic components.

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“…In the commonly used algorithm for supplying compressed air to actuators, only air transmission power is used, while air expansion power is lost. The method of using expansion power is implemented through intermittent air supply and a directional control valve bridge system [18,20]. Air expansion power is used through an appropriate algorithm controlling the suppling and cutting off of compressed air and monitoring the position of the piston and the pressure in the chambers during stroke.…”

Section: Introdutionmentioning

confidence: 99%

Exergy Analysis for the Intermittent Air Supply in Pneumatic Machines

Gryboś,

Leszczyński

2024

14th International Fluid Power Conference

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Pneumatic systems are widely used to automate production lines in manufactured plants. Their big disadvantage is their low energy efficiency, 10-20%. It is mainly due to the overconsumption of compressed air by the oversized pneumatic actuator and other components. Reducing air consumption at the utilisation stage can result in significant exergy savings. This can be done by lowering the supply pressure, introducing back pressure, or using expansion energy in the actuator. The most promising is the last method that can be implemented using the intermittent air supply in the pneumatic actuator. The literature lacks an exergy analysis of the utilisation stage of pneumatic and intermittent air supply systems. There is also no optimisation of the control algorithm of intermittent air supply control algorithm in terms of minimising exergy consumption. In this paper, we demonstrate a mathematical model and exergy analysis as a tool for assessing the efficiency of the utilisation of pneumatic system and conduct computer simulation. Exergy analysis showed that for intermittent air supply the reduction in exergy consumption decreased by more than 60% compared to the classic oversized system. The results of the computer simulation give the opportunity to optimise the operation of the utilisation stage in pneumatic systems. Furthermore, exergy analysis can be a useful tool for energy analysis and assessment of pneumatic systems, as well as providing information on the desired direction of changes in the installation.

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Saving Energy by Predictive Supply Air Shutoff for Pneumatic Drives

Cited by 7 publications

References 11 publications

A Review of Energy Overconsumption Reduction Methods in the Utilization Stage in Compressed Air Systems

A Review of Energy Overconsumption Reduction Methods in the Utilization Stage in Compressed Air Systems

Energy Efficiency of Pneumatic Actuating Systems with Pressure-Based Air Supply Cut-Off

Exergy Analysis for the Intermittent Air Supply in Pneumatic Machines

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