Reuse of Exhausted Air from Multi-Actuator Pneumatic Control Systems

Šešlija, Milan; Reljić, Vule; Šešlija, Dragan; Dudić, Slobodan; Dakić, Nikolina; Jovanović, Zoran

doi:10.3390/act10060125

Cited by 7 publications

(9 citation statements)

References 22 publications

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“…However, this solution introduces complexity and incurs an additional 83% investment cost compared to a traditional pneumatic system. Šešlija et al [76] presented a similar idea of recirculating exhaust air into the supplied chamber, achieving air consumption savings ranging from 12% to 38% when the stroke time increased to 1.2 to 5.7 s, respectively. Merkelbach et al [18] performed an experimental and computational exergetic analysis for cross flow in which they used the exhaust air of the chamber to retract movement and achieved 55% savings in compressed air.…”

Section: Methods Of Introducing Back Pressurementioning

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 Introducing Back Pressurementioning

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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“…The idea of the exhaust air being saved in pneumatics, as presented in [12], was examined in a large number of publications (e.g., [13,14]). With the exhaust air storage strategy developed in [15], energy savings of 22% could be achieved in a handling system. It is also possible to convert the exhaust air energy into other forms of energy, e.g., electrical [16,17] or hydraulic [18], or to return the exhaust air back to the compressor, thus building a so-called closed pneumatic circuit (see [19][20][21]).…”

Section: Types Of Energy-saving Circuitsmentioning

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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“…The charging time of the reserve air tank and the average pressure increase time must be in accordance with the regulations developed by the Working Group on Agricultural Tractors (WGAT) of the EC [32]. In [33], the operation of a multi-actuator pneumatic system with energy recovery in a CAST was discussed by collecting and reusing compressed air. Compared to a standard pneumatic control system in an energy-recovery pneumatic control system, air consumption was reduced by 37%.…”

Section: Utilization Of Stored Energy In Castsmentioning

confidence: 99%

Study of the Energy Efficiency of Compressed Air Storage Tanks

Dindorf

2024

Sustainability

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This study focusses on the energy efficiency of compressed air storage tanks (CASTs), which are used as small-scale compressed air energy storage (CAES) and renewable energy sources (RES). The objectives of this study are to develop a mathematical model of the CAST system and its original numerical solutions using experimental parameters that consider polytropic charging and discharging processes, changes in the time of the temperature, flow parameters of the inlet and outlet valves under choked and subsonic conditions, and the characteristics of the air motor. This model is used to select CAST as an energy storage system for compressed air generated by compressors and recycling, as well as an energy source to drive DC generators and a pneumatic propulsion system (PPS). A measuring test rig is built to verify the polytropic pressure and temperature variations during CAST charging and discharging obtained from numerical solutions. The topic of discussion is the functional model of a high-pressure air system (HPAS) that contains a CAST connected to an air motor coupled to a mechanical drive for a DC generator or PPS. Such a system is used in small-scale CASTs, which currently respond to socio-economic demands. The presented CAST energy efficiency indicators are used to justify the storage of compressed air energy on a small scale. Small-scale compressed air storage in CASTs is currently important and relevant due to the balance between peak electricity demand and the development of wind energy, photovoltaics, and other renewable energy sources.

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Reuse of Exhausted Air from Multi-Actuator Pneumatic Control Systems

Cited by 7 publications

References 22 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

Study of the Energy Efficiency of Compressed Air Storage Tanks

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