Performance Improvement of Single Screw Compressor by Meshing Clearance Adjustment Used in Refrigeration System

Lu, Yao; Liu, Shanwei; Wu, Yuting; Zhi, Ruiping; Wen, Qiangyu; Ma, Chongfang

doi:10.1007/s11630-020-1291-5

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…Wen et al proposed a novel approach to calculate the area of the injection aperture of the single-screw refrigeration compressor, established a thermodynamic model representing the compressor, including the injection procedure, and experimentally verified that the injection could decrease the compressor's discharge temperature [10]. Lu et al researched the performance of the single-screw refrigeration compressor with different meshing clearance [11].…”

Section: Introductionmentioning

confidence: 99%

Influence of water injection parameters on the performance of a water-lubricated single-screw air compressor

Zhi

et al. 2022

J Mech Sci Technol

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A thermodynamic model of a water-lubricated single-screw air compressor was established to examine the impact of water injection parameters on performance. Heat transfer and leakage between humid air and water was considered by analyzing the impacts of rotation speed, discharge pressure, the rate of water injection, and diameter of droplets on the performance of a compressor. The discharge temperature could be reduced by increasing the rate of water injection, resulting in the compression procedure moving towards an isothermal state. The increase in the rate of water injection under rated conditions from 60 L/min to 80 L/min resulted in a reduction in the compressor discharge temperature, increased the volume efficiency, and increased adiabatic efficiency by 11.1 K, 1.5 %, and 2.8 %, respectively. Water injection atomization increased the area of transfer of heat between humid air and water and improved the performance of compressor.

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Section: Introductionmentioning

confidence: 99%

Influence of water injection parameters on the performance of a water-lubricated single-screw air compressor

Zhi

et al. 2022

J Mech Sci Technol

Self Cite

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“…Clearance setting has a significant effect on the efficiency and wear of screw machines. Larger clearance would cause serious degradation in volumetric efficiency and adiabatic efficiency of screw machines, due to internal leakage [40,41]. In order to evaluate the meshing clearance for twin-screw rotors, Wu et al [42] proposed a numerical method by calculating the distance between two normal racks generated from measured discrete tooth profile points.…”

Section: Profile and Geometric Characteristicsmentioning

confidence: 99%

A Review of Recent Research and Application Progress in Screw Machines

Wang

Liu

et al. 2022

Machines

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Screw machines, mainly including single-screw type and twin-screw type, have gone through significant development and improvement during the past decade. This paper reviews the relevant studies available in the open literature for acquiring insight into and to establish the state of the art of the research and application status of screw machines. The related research on different aspects, which would affect the performance and reliability of screw machines includes rotor profile and geometric characteristics, thermodynamic modelling, vibration and noise, lubrication and wear, control of capacity and built-in volume ratio, and liquid injection technology. In the aspect of thermodynamic modelling, the available methods, i.e., empirical or semi-empirical model, lump model, and 3D CFD model, adopted for the performance prediction and optimal design of screw machines are summarized. Then, the review covers the application status of screw machines in the fields of air compression and expansion, refrigeration and heat pump, organic Rankine cycle (ORC), and other popular applications, with an emphasis on the reported performance and progress in technologies of screw machines. Finally, conclusions and perspectives for future research in the area of screw machines are presented. The review provides readers with a good understanding of the research focus and progress in the field of screw machines.

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“…Several unknown relations are included in the basic equations, such as heat transfer and leakage items. The calculation methods for these items and the whole basic equations are given in references [26][27][28][29][30][31][32]. The basic equations and the items of heat transfer and leakage constitute the thermodynamics model.…”

Section: Thermodynamics Model Of the Sscsmentioning

confidence: 99%

A Theoretical Method for Evaluating the Lubrication Performance of the Meshing Pair Profiles in Water Flooded Single Screw Compressors Based on the Micro Deflecting Motion Trajectory

Jiang

Gan

et al. 2020

Applied Sciences

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To improve the life of the meshing pair in single screw compressor (SSC), several meshing pair profiles (MPP) were proposed for raising the lubrication properties. Therefore, it is necessary to evaluate the lubrication performance of the MPPs. In this paper, an evaluation method based on micro deflecting motion trajectory (MDMT) is proposed and the theoretical model to realize MDMT is established. The model mainly contains a geometric model, a thermodynamics model, a hydrodynamic lubrication model and corresponding algorithm. With the presented method, three kinds of MPP including single straight line type (SSLT), single column type (SCT) and multi column type (MCT) have been analyzed. Obtained results show that compared to the SSLT and SCT, the MCT generates the greatest peak value of the water film pressure. The total torque applied on the gate-rotor generated by the water films decreases with the increment of the discharge pressure and increases with the machine size. The water film stiffness firstly decreases and then increases with the micro deflecting angle increasing. The water film stiffness at trailing side is always larger than that at leading side. As the discharge pressure increases, the MDMT curves approach the leading flank, and the lubrication properties get worse. With the machine size increasing, the MDMT curves move towards the trailing side and the lubrication performance is improved. Comparing to the other two MPPs, the MCT can achieve floating mesh without contact in relatively larger machines and comparably lower discharge pressure.

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Performance Improvement of Single Screw Compressor by Meshing Clearance Adjustment Used in Refrigeration System

Cited by 8 publications

References 16 publications

Influence of water injection parameters on the performance of a water-lubricated single-screw air compressor

Influence of water injection parameters on the performance of a water-lubricated single-screw air compressor

A Review of Recent Research and Application Progress in Screw Machines

A Theoretical Method for Evaluating the Lubrication Performance of the Meshing Pair Profiles in Water Flooded Single Screw Compressors Based on the Micro Deflecting Motion Trajectory

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