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Influence of Rotational Speed on Isothermal Piston Compression System.

Teng Ren¹, De-Xi Wang¹, Wei-Qing Xu²

¹School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China.

Entropy (Basel, Switzerland)

|May 16, 2023

Summary

This summary is machine-generated.

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High rotational speeds in isothermal pistons increase flow resistance, significantly raising total work required. This study analyzes resistance effects to optimize performance up to 650 rpm.

Area of Science:

Thermodynamics
Fluid Mechanics
Mechanical Engineering

Background:

Isothermal pistons enhance heat transfer using porous media for near-isothermal compression.
Flow resistance arises from porous media interaction with liquids, impacting high-speed operation.

Purpose of the Study:

Analyze the influence of rotational speed on isothermal piston compression systems.
Investigate the impact of flow resistance at varying operational speeds.

Main Methods:

Developed a mathematical model for flow resistance based on face-centered cubic structure.
Defined energy conservation rate and efficiency for the isothermal piston.
Assessed comprehensive energy conservation performance.

Main Results:

Keywords:

energy conservation flow resistance isothermal piston porous media

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Resistance work increases significantly and proportionally with rotational speed.
The proportion of resistance work in total work rises sharply with speed.
Total work (compression + resistance) remains below adiabatic compression work.

Conclusions:

Rotational speed is a critical factor affecting isothermal piston efficiency due to flow resistance.
Optimizing operational speed is crucial to mitigate performance degradation.
Maximum recommended speed for this system is 650 rpm.