Exergy analysis of the pneumatic line throwing system

Wang, Zhiwen; Xiong, Wei; Wang, Haitao; Wang, Zuwen

doi:10.1504/ijex.2016.075669

Cited by 12 publications

(12 citation statements)

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“…That valve is controlled using a pulse-width modulation (PWM) technique associated with another Proportional-Integral (PI) controller, and whose role is to connect the chambers of the cylinder to reduce the compressed air consumption of pneumatic positioning systems with external loads. An exergy-related analysis was used in [20] to evaluate the pneumatic systems efficiency, and it was shown that this analysis is the most suitable tool. An energy saving approach, achieved by adding a by-pass flow-enabling valve between the chambers of the cylinder, is proposed in [21,22].…”

Section: Energy Efficiency Of Compressed Air Systemsmentioning

confidence: 99%

Improving Energy Efficiency of Flexible Pneumatic Systems

et al. 2021

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During pneumatic control system design, the critical value for choosing the appropriate pneumatic actuator is the weight of the workpiece. In the case of flexible production systems, which are the core part of the Industry 4.0 (I4.0) concept, the weight of the workpieces is often variable, since the crucial feature of this kind of production is its ability to deal with variable parts. Therefore, in order to deal with the variable weight of parts, a pneumatic actuator is chosen according to the heaviest part. However, according to another I4.0 principle, energy efficient operation of machines, the previous criteria for choosing a pneumatic actuator is energy efficient only when handling the heaviest part. In all other cases, operation of the pneumatic actuator is suboptimal in terms of energy efficiency. Aiming to solve this problem, this paper considers the possibility of using a new pressure regulator instead of traditional manually adjusted pressure regulators. This regulator provides operating pressure modification in real-time in accordance with the weight of the workpieces. In this way, the optimal compressed air consumption is ensured for each workpiece. Implementation of this device has yielded significant energy savings; however, the value is variable and depends on working task characteristics.

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Section: Energy Efficiency Of Compressed Air Systemsmentioning

confidence: 99%

Improving Energy Efficiency of Flexible Pneumatic Systems

et al. 2021

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“…Thus, the high‐pressure compressed air discharged from the air reservoir is usually reduced to a lower pressure before driving the expanders. However, a large amount of exergy is destroyed in the throttling decompression processes . A potential strategy to mitigate this exergy destruction is the introduction of adaptive stages and sliding pressure designs into compressors and expanders in CAES systems.…”

Section: Mre Storagementioning

confidence: 99%

“…However, a large amount of exergy is destroyed in the throttling decompression processes. 141 A potential strategy to mitigate this exergy destruction is the introduction of adaptive stages and sliding pressure designs into compressors and expanders in CAES systems. Though the control and structure of the system does become more complex.…”

Section: Isochoric Caesmentioning

confidence: 99%

A review of marine renewable energy storage

et al. 2019

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Summary Marine renewable energies are promising enablers of a cleaner energy future. Some technologies, like wind, are maturing and have already achieved commercial success. Similar to their terrestrial counterparts, marine renewable energy systems require energy storage capabilities to achieve the flexibility of the 21st century grid demand. The unique difficulties imposed by a harsh marine environment challenge the unencumbered rise of marine renewable energy generation and storage systems. In this study, the fundamentals of marine renewable energy generation technologies are briefed. A comprehensive review and comparison of state‐of‐the‐art novel marine renewable energy storage technologies, including pumped hydro storage (PHS), compressed air energy storage (CAES), battery energy storage (BES), hydrogen energy storage (HES), gravity energy storage (GES), and buoyancy energy storage (ByES), are conducted. The pros and cons, and potential applications, of various marine renewable energy storage technologies are also compiled. Finally, several future trends of marine renewable energy storage technologies are connoted.

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“…Pneumatic systems powered by compressed air are widely used in industrial and non‐manufacturing sectors 1 . Air can be compressed and regulated to the desired pressure for various applications, such as power transmission, control, conveying, spraying, vacuum generation, compressed air energy storage, hybrid vehicle, hypersonic wind tunnel, geological air gun, air explosion extraction, and so on 2‐7 . In many facilities, compressed air is usually regarded as the “fourth utility” after electricity, water, and natural gas.…”

Section: Introductionmentioning

confidence: 99%

Accumulated and transient exergy analyses of pneumatic systems with isochoric and isobaric compressed air storage tanks

et al. 2021

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Low energy efficiency is one of the most significant shortcomings of industrial pneumatic systems. The isobaric air storage tank is a new concept for improving the energy efficiency of pneumatic systems. In this study, comprehensive accumulated and transient exergy analyses are conducted to provide insight into the energy‐saving mechanism of isobaric air storage tanks. The results show that the system exergy efficiency can be improved by replacing the isochoric tank with an isobaric one. There is negligible exergy destruction in both storage tanks. However, the storage tank can bring about significant influences on other components. The isobaric tank can effectively improve the exergy efficiencies of the compressor, cooler, and regulator. Besides, there is a huge potential to improve system exergy efficiency by taking advantage of the wasted exergy from the pneumatic cylinder.

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Exergy analysis of the pneumatic line throwing system

Cited by 12 publications

References 0 publications

Improving Energy Efficiency of Flexible Pneumatic Systems

Improving Energy Efficiency of Flexible Pneumatic Systems

A review of marine renewable energy storage

Accumulated and transient exergy analyses of pneumatic systems with isochoric and isobaric compressed air storage tanks

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