Efficiency improvement of liquid piston compressor using metal wire mesh for near-isothermal compressed air energy storage application

Patil, Vikram C.; Líu, Jùn; Ro, Paul I.

doi:10.1016/j.est.2020.101226

Cited by 40 publications

(25 citation statements)

References 15 publications

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“…An energy equation for the air inside a liquid piston compression chamber can be obtained by applying the first law of thermodynamics [24,31,35,37]…”

Section: Liquid Piston Heat Transfermentioning

confidence: 99%

“…When an insert and spray injection are employed simultaneously, heat is transferred from the air to both the insert and water droplets. The heat transfer with the insert can be expressed as Equation ( 6) [31], and the heat transfer term that originates from the injected droplets can be expressed as Equation ( 7) [35].…”

Section: Umentioning

confidence: 99%

“…In [26], it was discovered that the length and changes in cross-section diameter are beneficial factors with regard to improving the compression efficiency. Putting an insert into the liquid piston compression is a validated way by simulation and experiments to enlarge the surface area to enhance heat transfer [27][28][29][30][31][32]. Because of the conformity of liquid, a liquid piston compressor allows for the use of inserts even with complex geometry.…”

Section: Introductionmentioning

confidence: 99%

“…Apart from the porous media inserts, metal wire mesh played the role of an insert to enlarge the surface area in the liquid piston gas compression. With the addition of an extra surface area, temperature abatement enhancement was observed, and up to 90% of isothermal efficiency was reached with the use of the metal wire mesh insert [31]. In this study, metal wire mesh structures made of copper and aluminum were tested to investigate the impact of different materials.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Integrating Metal Wire Mesh with Spray Injection for Liquid Piston Gas Compression

Ahn

Patil²,

2021

Energies

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Heat transfer enhancement techniques used in liquid piston gas compression can contribute to improving the efficiency of compressed air energy storage systems by achieving a near-isothermal compression process. This work examines the effectiveness of a simultaneous use of two proven heat transfer enhancement techniques, metal wire mesh inserts and spray injection methods, in liquid piston gas compression. By varying the dimension of the inserts and the pressure of the spray, a comparative study was performed to explore the plausibility of additional improvement. The addition of an insert can help abating the temperature rise when the insert does not take much space or when the spray flowrate is low. At higher pressure, however, the addition of spacious inserts can lead to less efficient temperature abatement. This is because inserts can distract the free-fall of droplets and hinder their speed. In order to analytically account for the compromised cooling effects of droplets, Reynolds number, Nusselt number, and heat transfer coefficients of droplets are estimated under the test conditions. Reynolds number of a free-falling droplet can be more than 1000 times that of a stationary droplet, which results in 3.95 to 4.22 times differences in heat transfer coefficients.

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“…An energy equation for the air inside a liquid piston compression chamber can be obtained by applying the first law of thermodynamics [24,31,35,37]…”

Section: Liquid Piston Heat Transfermentioning

confidence: 99%

Section: Umentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Integrating Metal Wire Mesh with Spray Injection for Liquid Piston Gas Compression

Ahn

Patil²,

2021

Energies

Self Cite

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“…[ 14 ]. To address these issues, much work has been devoted to the optimization of CAES cycles [ 16 , 17 , 18 ], the development of related equipment [ 19 , 20 , 21 ], and CAES operation strategies [ 22 , 23 , 24 ]. Besides, integrating CAES systems with other energy systems or power cycles is regarded as an effective approach to cover the shortages of CAES and improve its performance.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Evaluation and Sensitivity Analysis of a Novel Compressed Air Energy Storage System Incorporated with a Coal-Fired Power Plant

Pan

Zhang

Peng

et al. 2020

Entropy

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A novel compressed air energy storage (CAES) system has been developed, which is innovatively integrated with a coal-fired power plant based on its feedwater heating system. In the hybrid design, the compression heat of the CAES system is transferred to the feedwater of the coal power plant, and the compressed air before the expanders is heated by the feedwater taken from the coal power plant. Furthermore, the exhaust air of the expanders is employed to warm partial feedwater of the coal power plant. Via the suggested integration, the thermal energy storage equipment for a regular CAES system can be eliminated and the performance of the CAES system can be improved. Based on a 350 MW supercritical coal power plant, the proposed concept was thermodynamically evaluated, and the results indicate that the round-trip efficiency and exergy efficiency of the new CAES system can reach 64.08% and 70.01%, respectively. Besides, a sensitivity analysis was conducted to examine the effects of ambient temperature, air storage pressure, expander inlet temperature, and coal power load on the performance of the CAES system. The above work proves that the novel design is efficient under various conditions, providing important insights into the development of CAES technology.

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Liquid Piston Compression Heat Transfer Prediction via Thermal‐Resistance Network: Simulation, Experimental Validation, and Liquid Carryover Evaluation

Middleton,

Bernagozzi,

Morgan

et al. 2024

Energy Tech

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Liquid piston compressors gain attention due to their potential for more efficient and isothermal compression compared to traditional solid piston compressors. Liquid piston compressors use a liquid column instead of a solid piston, allowing for innovative mechanisms to enhance heat transfer and achieve near‐isothermal compression. However, a validated analytical model for heat transfer in liquid piston compressors is still needed to understand the exhaust phase within a liquid piston. In this work, a thermal network model, able to predict the polytropic index to within 8% of the experimental results, is proposed. Moreover, thorough experimentation is conducted to measure the amount of liquid carried over to better understand the exhaust phase. In the results, it is revealed that the piston carries over 13–21 mL of liquid within the exhaust gas for 10–23 s of stroke. Notably, the difference in liquid carried over for the three‐stroke times is not statistically significant, indicating that the liquid carried over is a function of liquid piston design and not stroke time. Finally, most liquid piston applications consider only water; hence, for the first time, this research assesses the stability of a cycle using a nonflammable hydraulic fluid (Fuchs 46 M red) to enhance compressor longevity and material compatibility.

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Efficiency improvement of liquid piston compressor using metal wire mesh for near-isothermal compressed air energy storage application

Cited by 40 publications

References 15 publications

Effect of Integrating Metal Wire Mesh with Spray Injection for Liquid Piston Gas Compression

Effect of Integrating Metal Wire Mesh with Spray Injection for Liquid Piston Gas Compression

Thermodynamic Evaluation and Sensitivity Analysis of a Novel Compressed Air Energy Storage System Incorporated with a Coal-Fired Power Plant

Liquid Piston Compression Heat Transfer Prediction via Thermal‐Resistance Network: Simulation, Experimental Validation, and Liquid Carryover Evaluation

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