Estimation of leakage through radial clearance during compression process of a rolling piston rotary compressor

Kim, Geonwoo; Min, Byungchae; Na, Sangkyung; Choi, Gyung‐Min; Kim, Duckjool

doi:10.1007/s12206-017-1147-4

Cited by 12 publications

(4 citation statements)

References 7 publications

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“…The graphs featured in the work by Yuan et al [24] indicate that a carefully selected discharge coefficient can bring the results of the orifice assumption close to the results of a more sophisticated and computationally costly model. Kim et al [25] utilised computational fluid dynamics (CFD) to determine the flow coefficient with respect to the change in upstream pressure and the width of radial clearance. It was found that the discharge coefficient ranges from 0.17 to 0.85 for the radial clearance of 10 µm to 60 µm under an upstream pressure of 30 bar.…”

Section: Leakagementioning

confidence: 99%

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

Lu,

Sultan,

Phung

2023

Energies

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Positive displacement compressors are essential in many engineering systems, from domestic to industrial applications. Many studies have been devoted to providing more insights into the workings and proposing solutions for performance improvements of these machines. This study aims to present a systematic review of published research on positive displacement compressors of various geometrical structures. This paper discusses the literature on compressor topics, including leakage, heat transfer, friction and lubrication, valve dynamics, port characteristics, and capacity control strategies. Moreover, the current status of the application of machine learning methods in positive displacement compressors is also discussed. The challenges and opportunities for future work are presented at the end of the paper.

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Section: Leakagementioning

confidence: 99%

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

Lu,

Sultan,

Phung

2023

Energies

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“…Single-phase flow leakage models assume isentropic flow [11] with a correction term such as a flow coefficient [74,106] which can include viscous [107,108] and/or inertial effects [109] for accuracy. On the other hand, homogenous two-phase flow models assume thermal equilibrium [110] or isothermal conditions [111,112].…”

Section: Internal Leakagementioning

confidence: 99%

A Review on Sliding Vane and Rolling Piston Compressors

Ooi

2021

Machines

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Rotary compressors have been employed in heating and cooling for more than a century and are ubiquitous in daily life but there has not been any comprehensive record of their development and technological advances. This review paper attempts to provide a comprehensive account of the advances in R&D and design evolution of these rotary compressors since their inception, namely the sliding vane compressor, rolling piston compressor, and their design variants in open literature. This is to showcase the current state-of-the-art for these compressors so that researchers can use it as a basis for future work. Based on authors’ insight, inter-disciplinary research combined with advancements in ‘disruptive’ technology such as artificial intelligence and advancements in additive manufacturing might be a promising research direction to bring about improvements in rotary compressor performance to meet mankind’s growing needs for cooling and heating applications.

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“…The rolling piston rotary compressor has the advantages of simple design, small size, light weight, low cost, and high performance, and is widely used in domestic refrigerators and air conditioners. 1 As one of the core components of the refrigeration system, the reliability and efficiency of the compressor directly affect the work of the entire refrigeration system, so it has always been an important issue in the industry. The energy efficiency of the compressor depends first on the gas valve, and the abnormal movement of the exhaust valve (chatter, shut-off hysteresis) is the main reason for the additional flow losses.…”

Section: Introductionmentioning

confidence: 99%

Fluid–solid coupling numerical simulation for the performance prediction and valve dynamic analysis of a rotary compressor

Deng

Zhang

Zhu

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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To predict the performance of a rotary compressor and study the dynamic coupling characteristics of the valve, a three-dimensional dynamic model of the compressor is constructed in this paper. The model adopts the fluid–solid interaction method and the dynamic grid technique to achieve coupled reed valve motion. Meanwhile, to solve the problem of grid deformation caused by large deformation of the valve plate, a user-defined dynamic grid method is used to realize grid updating in the deformed area based on computational fluid dynamics method and the ideas of spring smoothing method. The model is validated with a cooling capacity error of 6.07% and an indicated power error of 2%. The stress, the displacement, the velocity and the pressure of the valve is analyzed. The flow characteristics and the dynamic characteristics of the valve plate obtained provide a reference for the design of the compressor.

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Estimation of leakage through radial clearance during compression process of a rolling piston rotary compressor

Cited by 12 publications

References 7 publications

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

A Literature Review of the Positive Displacement Compressor: Current Challenges and Future Opportunities

A Review on Sliding Vane and Rolling Piston Compressors

Fluid–solid coupling numerical simulation for the performance prediction and valve dynamic analysis of a rotary compressor

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