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Energies
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Advanced Research on High-Energy Performance Compressors II
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Advanced Research on High-Energy Performance Compressors II

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J: Thermal Management".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 3903

Special Issue Editors

Prof. Dr. Jianmei Feng

E-Mail Website
Guest Editor
Department of Compressor Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Interests: positive displacement compressor; flow and heat transfer; multiphase flow; hydrogen energy; hydrogen pump and air compressor in FCV; ejectors; gas liquid separation; gas pulsation and piping vibration
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Zhongguo Sun

E-Mail Website
Guest Editor
Department of Fluid Machinery and Engineering, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
Interests: computational fluid dynamics with meshless methods; theory and experimental study of the flow in fluid machinery; micro fluid machinery and complex flow in fluid engineering; ocean science, technology and engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Driven by global carbon reduction targets, compressors as a heavy consumer of energy will face many opportunities and challenges. It is urgent to research and develop more energy-saving and innovative products. Thus, relevant fundamental and practical research is necessary. The aims and topics of this Energies Special Issue on “Advanced Research on High-Energy Performance Compressors” cover all cutting-edge studies on various compressors in different applications, including refrigeration fields, heat pumps, nature gas fields, gas gathering and transportations, hydrogen utilization, oil and gas exploitation, etc.

The following topics, among others, are included in this issue:

  • Numerical simulation and experiments in compressors;
  • High-pressure hydrogen compressors for hydrogen refueling stations;
  • Large compressors for gas storage and transportation;
  • Carbon dioxide compressors for new energy vehicles;
  • High-performance compressors for fuel cell vehicles;
  • Energy saving technologies and applications on compressors;
  • Intelligent fault diagnosis system and noise control methods for compressors.

Prof. Dr. Jianmei Feng
Prof. Dr. Zhongguo Sun
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. Energies is an international peer-reviewed open access semimonthly 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 2600 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

  • numerical simulation
  • transient flow
  • energy saving
  • hydrogen utilization
  • BOP of fuel cell system
  • high performance
  • high speed

Related Special Issue

Published Papers (3 papers)

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Research

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17 pages, 3558 KiB  
Article
Research on Optimization of Profile Parameters in Screw Compressor Based on BP Neural Network and Genetic Algorithm
by Tao Wang, Qiang Qi, Wei Zhang and Dengyi Zhan
Energies 2023, 16(9), 3632; https://0-doi-org.brum.beds.ac.uk/10.3390/en16093632 - 23 Apr 2023
Cited by 7 | Viewed by 1653
Abstract
In order to accurately calculate the geometric characteristics of the twin-screw compressor and obtain the optimal profile parameters, a calculation method for the geometric characteristics of twin-screw compressors was proposed to simplify the profile parameter design in this paper. In this method, the [...] Read more.
In order to accurately calculate the geometric characteristics of the twin-screw compressor and obtain the optimal profile parameters, a calculation method for the geometric characteristics of twin-screw compressors was proposed to simplify the profile parameter design in this paper. In this method, the database of geometric characteristics is established by back-propagation (BP) neural network, and the genetic algorithm is used to find the optimal profile design parameters. The effects of training methods and hidden layers on the calculation accuracy of neural network are discussed. The effects of profile parameters, including inner radius of the male rotor, protection angle, radius of the elliptic arc, outer radius of the female rotor on the comprehensive evaluation value composed of length of the contact line, blow hole area and area utilization rate, are analyzed. The results show that the time consumed for the database established by BP neural network is 92.8% shorter than that of the traditional method and the error is within 1.5% of the traditional method. Based on the genetic algorithm, compared with the original profile, the blow hole area of the screw compressor profile optimized by genetic algorithm is reduced by 54.8%, the length of contact line is increased by 1.57% and the area utilization rate is increased by 0.32%. The CFD numerical model is used to verify the optimization method, and it can be observed that the leakage through the blow hole of the optimized model is reduced, which makes the average mass flow rate increase by 5.2%, indicating the effectiveness of the rotor profile parameter optimization method. Full article
(This article belongs to the Special Issue Advanced Research on High-Energy Performance Compressors II)
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20 pages, 6986 KiB  
Article
Effects of Liquid Density on the Gas-Liquid Interaction of the Ionic Liquid Compressor for Hydrogen Storage
by Yi Guo, Qi Wang, Maofei Geng, Xueyuan Peng and Jianmei Feng
Energies 2023, 16(7), 3193; https://0-doi-org.brum.beds.ac.uk/10.3390/en16073193 - 01 Apr 2023
Cited by 4 | Viewed by 1409
Abstract
As a new and promising compression technology for hydrogen gas, the ionic liquid compressor inherits the advantages of the ionic liquid and the hydraulic system. The liquid density is one of the key parameters influencing the fluid flow field, the sloshing of the [...] Read more.
As a new and promising compression technology for hydrogen gas, the ionic liquid compressor inherits the advantages of the ionic liquid and the hydraulic system. The liquid density is one of the key parameters influencing the fluid flow field, the sloshing of the bulk liquid, and the movement of droplets generated during the compressor operation. An appropriate selection of the liquid density is important for the compressor design, which would improve the thermodynamic performance of the compressor. However, the density of the ionic liquid varied significantly depending on the specific combination of the cation and anions. This paper proposed the methodology to select the optimal liquid density used in the ionic liquid compressor for hydrogen storage. The gas-liquid interaction in the compression chamber is analysed through numerical simulations under varied liquid density values. Results found that the increase in the liquid density promoted the detachment of the ionic liquid from the cylinder cover during the suction procedure and the contact of the bulk liquid on the compressor cover when the gas is compressed in the cylinder during the compression procedure. Both the droplet size and the dimension of the derived gas vortex decreased when the liquid density increased. The lowest mass transfer of hydrogen through the outlet was obtained at the density of 1150 kg/m3. The density of the ionic liquid from 1300 to 1450 kg/m3 is suggested to the hydrogen compressor, taking into account the transient two-phase flow characteristics, the mass transfer, and the total turbulent kinetic energy. Full article
(This article belongs to the Special Issue Advanced Research on High-Energy Performance Compressors II)
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Review

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27 pages, 2361 KiB  
Review
Instability Phenomena in Centrifugal Compressors and Strategies to Extend the Operating Range: A Review
by Carlo Cravero and Davide Marsano
Energies 2024, 17(5), 1069; https://0-doi-org.brum.beds.ac.uk/10.3390/en17051069 - 23 Feb 2024
Viewed by 548
Abstract
Centrifugal compressors are widely used in different fields. Their design requires high performance and a wide operating range, where, at lower mass flow rates, unstable flow dynamic phenomena occur, which are extremely harmful and, at the same time, complex to fully understand. This [...] Read more.
Centrifugal compressors are widely used in different fields. Their design requires high performance and a wide operating range, where, at lower mass flow rates, unstable flow dynamic phenomena occur, which are extremely harmful and, at the same time, complex to fully understand. This review paper presents the main research from the last 40 years on the subject of instability in centrifugal compressors, aiming to clarify the main (sometimes contradictory) causes, classifying them according to the component in which they are triggered or the interaction between them. Importance is given to works that develop criteria for the identification of the stability limit with simplified models. The main techniques used to extend the stability limit are also presented by distinguishing between passive and active fixed-flow control methods; moreover, the main works on variable geometry techniques are reported, showing the advantages and disadvantages of their use. Finally, an overview of the innovative applications of centrifugal compressors, such as fuel cells, is presented. The aim of this review is to highlight the continued interest in this field of study and provide the tools to understand the different unstable mechanisms and techniques used to extend the operating limit. Full article
(This article belongs to the Special Issue Advanced Research on High-Energy Performance Compressors II)
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