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Machines
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Advances in Positive Displacement Compressors
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Advances in Positive Displacement Compressors

A special issue of Machines (ISSN 2075-1702). This special issue belongs to the section "Machine Design and Theory".

Deadline for manuscript submissions: closed (30 November 2022) | Viewed by 15367

Special Issue Editors

Prof. Dr. Kim Tiow Ooi

E-Mail Website
Guest Editor
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
Interests: thermofluids; compressor; rotary compressor; energy efficiency; cooling and heating; air-conditioning; positive displacement compressor; microchannel
Dr. Kuan Thai Aw

E-Mail Website
Guest Editor
School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore
Interests: positive displacement devices; mechanical design; thermodynamics; heat transfer; fluid dynamics

Special Issue Information

Dear Colleagues,

The use of positive displacement compressors became more prominent during the Industrial Revolution. Since then, they have been introduced in many aspects of society and industry today, such as air compression, petrochemicals, heating and cooling applications, etc. Similarly, research and development on positive displacement compressors have also come a long way, adapting to humankind’s ever-changing needs. At the turn of the 21st century, with increased emphasis on energy efficiency and environmental sustainability, advancements in positive displacement compressors are crucial to ensure the environment’s liveability for future generations.

This Special Issue aims to document and keep track of current state-of-the-art research on positive displacement compressors. It can even inspire and spur greater efforts to further advance the development of these compressors. We are pleased to invite you to contribute original research on positive displacement compressors such as modelling, experimentation, design and optimization, new design features or mechanisms, etc.

In this Special Issue, original research articles and reviews are welcome

Prof. Dr. Ooi Kim Tiow
Dr. Kuan Thai Aw
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Machines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • positive displacement
  • compressors
  • numerical studies
  • optimization
  • mathematical modelling
  • design analysis
  • measurement
  • performance analysis
  • sustainability
  • energy

Published Papers (6 papers)

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Research

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23 pages, 5010 KiB  
Article
Numerical Analysis of Unsteady Heat Transfer in the Chamber in the Piston Hybrid Compressor with Regenerative Heat Exchange
by Victor Shcherba, Anatoliy Khait, Evgeniy Nosov and Evgeniy Pavlyuchenko
Machines 2023, 11(3), 363; https://doi.org/10.3390/machines11030363 - 7 Mar 2023
Cited by 4 | Viewed by 1117
Abstract
The adjoint thermodynamic and heat exchange processes in the new class piston compressor with regenerative heat exchange are considered in the paper. The implicit tridiagonal matrix algorithm is implemented to study the unsteady thermal conductivity in the cylinder–piston group. After the formulation of [...] Read more.
The adjoint thermodynamic and heat exchange processes in the new class piston compressor with regenerative heat exchange are considered in the paper. The implicit tridiagonal matrix algorithm is implemented to study the unsteady thermal conductivity in the cylinder–piston group. After the formulation of proper initial and boundary conditions, the optimal relationship between temporal and spatial discretization steps is determined. Two different time steps are used in the numerical solution of the two-way coupled fast thermodynamic and slow heat exchange models. The relationship between those time steps is determined as well. The conducted numerical experiments allow the analysis of the dynamics of heat exchange in the cylinder–piston group, temperature variation in different parts of the cylinder–piston group, the impact of the heat transfer processes on isothermal and adiabatic efficiency, the impact of heat exchange dynamics on the thermodynamic cycle, as well as other thermodynamic and energetic effects. Full article
(This article belongs to the Special Issue Advances in Positive Displacement Compressors)
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18 pages, 5031 KiB  
Article
Parametric Analysis of Gas Leakage in the Piston–Cylinder Clearance of Reciprocating Compressors
by Vitor M. Braga and Cesar J. Deschamps
Machines 2023, 11(1), 42; https://doi.org/10.3390/machines11010042 - 30 Dec 2022
Cited by 2 | Viewed by 1858
Abstract
Gas leakage is one of the main sources of inefficiencies in low-capacity reciprocating compressors, undermining the compressor performance by reducing the mass flow rate and increasing the energy consumption. In reciprocating compressors, leakage in the piston–cylinder clearance is driven by the piston motion [...] Read more.
Gas leakage is one of the main sources of inefficiencies in low-capacity reciprocating compressors, undermining the compressor performance by reducing the mass flow rate and increasing the energy consumption. In reciprocating compressors, leakage in the piston–cylinder clearance is driven by the piston motion and pressure difference between the compression chamber and the internal environment of the shell. This paper reports a parametric numerical analysis of leakage in the piston–cylinder clearance of a low-capacity reciprocating compressor. A simulation model based on the Reynolds equation is applied throughout the compression cycle to assess the effect of the compressor operating conditions, clearance geometry, piston velocity and piston secondary motion on the leakage and compressor performance. A 3D CFD model is also developed to validate the Reynolds leakage model and to evaluate the effect of the piston secondary motion on leakage, assuming the piston is fixed with predetermined eccentricities. The results show that the compressibility effects are very relevant to estimate the gas leakage. The simulations also revealed that leakage is more detrimental to the compressor performance when it is operating in low back-pressure conditions. Additionally, the piston secondary motion can intensify the gas leakage in the piston–cylinder clearance by up to 90%. On the other hand, the piston velocity only plays a minor role in assessing the leakage. Full article
(This article belongs to the Special Issue Advances in Positive Displacement Compressors)
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13 pages, 5697 KiB  
Article
Kinematic Characteristics Analysis of Orbiting Scroll and Structural Optimization of Oldham’s Coupling in Scroll Compression
by Yuqi Zhu, Wei Yuan, Qianjian Guo, Wenhua Wang, Liguo Zhang and Shuailun Zhu
Machines 2022, 10(8), 623; https://doi.org/10.3390/machines10080623 - 29 Jul 2022
Cited by 1 | Viewed by 2339
Abstract
The contact form of the orbiting scroll and Oldham’s coupling plays an important role in improving the operation stability of the scroll compressor. In this study, the kinematic simulation of key moving parts such as the orbiting scroll and Oldham’s coupling was carried [...] Read more.
The contact form of the orbiting scroll and Oldham’s coupling plays an important role in improving the operation stability of the scroll compressor. In this study, the kinematic simulation of key moving parts such as the orbiting scroll and Oldham’s coupling was carried out under the condition of low speed, and the reason for the impact between Oldham’s coupling and the orbiting scroll was revealed. Results showed that the clearance between the moving pairs causes the orbiting scroll to have a slight rotation tendency and causes the impact between Oldham’s coupling and the orbiting scroll. The angular velocity of the orbiting scroll in the x-axis direction can effectively characterize this impact. The impact of the Oldham’s coupling convex key on the mainframe keyway is more severe than that on the keyway of the orbiting scroll. By optimizing the structure of the convex key of Oldham’s coupling, the contact form between Oldham’s coupling and the orbiting scroll is improved, and the starting acceleration of the orbiting scroll is reduced by 53%, which greatly improved the working stability of the scroll compressor. Full article
(This article belongs to the Special Issue Advances in Positive Displacement Compressors)
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23 pages, 5882 KiB  
Article
Analysis of the Influence of Thermophysical Properties of a Droplet Liquid on the Work Processes of a Two-Stage Piston Hybrid Power Machine
by Victor Shcherba, Evgeniy Pavlyuchenko, Evgeniy Nosov and Irina Bulgakova
Machines 2022, 10(2), 70; https://doi.org/10.3390/machines10020070 - 19 Jan 2022
Cited by 4 | Viewed by 1972
Abstract
The article considers the influence of the main thermophysical properties of the power liquid on the working processes and energy characteristics of a new highly efficient two-stage piston hybrid power machine designed to compress gas to medium and high pressures. Mathematical model of [...] Read more.
The article considers the influence of the main thermophysical properties of the power liquid on the working processes and energy characteristics of a new highly efficient two-stage piston hybrid power machine designed to compress gas to medium and high pressures. Mathematical model of the working processes of the machine under study with a pro-filed working chamber of stage 2 has been developed. To verify the developed mathematical model of working processes, a prototype and a stand for its study were created. The visualization of the movement of the liquid piston, measurement of the instant pressure in the working chamber of the machine, energy and consumption characteristics verified the developed mathematical model. As a result of a numerical experiment, we determined that there is an optimal value of the dynamic viscosity of the power liquid, which depends on the angular velocity of the crankshaft and is in the range from 0.005 to 0.02 Pa∙s, with large values referring to large values of the angular velocity. With a decrease in the density of the power liquid, the work of friction forces decreases and the total indicator efficiency increases. The findings of the research can be used when choosing coolants in reciprocating compressors with a liquid piston. Full article
(This article belongs to the Special Issue Advances in Positive Displacement Compressors)
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21 pages, 5306 KiB  
Article
On the Design of a Class of Rotary Compressors Using Bayesian Optimization
by Kui Lu, Truong H. Phung and Ibrahim A. Sultan
Machines 2021, 9(10), 219; https://doi.org/10.3390/machines9100219 - 29 Sep 2021
Cited by 5 | Viewed by 2161
Abstract
The optimization process of compressors is usually regarded as a ‘black-box’ problem, in which the mathematical form underlying the relationship between design parameters and the design objective is impractical and costly to be obtained. To solve the ‘black-box’ problem, Bayesian optimization has been [...] Read more.
The optimization process of compressors is usually regarded as a ‘black-box’ problem, in which the mathematical form underlying the relationship between design parameters and the design objective is impractical and costly to be obtained. To solve the ‘black-box’ problem, Bayesian optimization has been proven as an accurate and efficient method. However, the application of such a method in the design of compressors is rarely discussed, particularly no work has been reported in terms of the positive displacement type compressor. Therefore, this paper aims to introduce the Bayesian optimization to the design of positive displacement compressors through the optimization process of the novel limaçon compressor. In this paper, a two-stage optimization process is presented, in which the first stage optimizes the geometric parameters as per design requirements and the second stage focuses on revealing an optimum setting of port geometries that improves machine performance. A numerical illustration is offered to prove the validity of the presented approach. Full article
(This article belongs to the Special Issue Advances in Positive Displacement Compressors)
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Review

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22 pages, 2268 KiB  
Review
A Review of Recent Research and Application Progress in Screw Machines
by Chuang Wang, Bingqi Wang, Mingkun Liu and Ziwen Xing
Machines 2022, 10(1), 62; https://doi.org/10.3390/machines10010062 - 14 Jan 2022
Cited by 8 | Viewed by 4333
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Advances in Positive Displacement Compressors)
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