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Enhancing Energy Efficiency in Process and Equipment Design Through Experiments and Numerical Simulations

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "I: Energy Fundamentals and Conversion".

Deadline for manuscript submissions: 5 June 2026 | Viewed by 534

Special Issue Editors


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Guest Editor
Department of Chemical Engineering and Equipment, Poznan University of Technology, 60-965 Poznan, Poland
Interests: multiphase flows; separation processes; atomization; sprays; mixing; chemical engineering and technology
Special Issues, Collections and Topics in MDPI journals
Military Academy, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
Interests: micro-and-nanostructuring techniques; surface modification; microchannels and PV pannels
Special Issues, Collections and Topics in MDPI journals

E-Mail Website1 Website2
Guest Editor
Institute of Chemical Technology and Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Interests: multiphase flows; separation processes; mixing; chemical engineering, process simulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the context of escalating energy demands and the urgent need to reduce environmental impact, this Special Issue aims to consolidate the latest research on improving energy efficiency in industrial processes and equipment design by experimental methods and numerical simulations. We invite contributions that explore multiscale and multiphysics phenomena—including, but not limited to, heat and mass transfer, fluid flow, phase change, and chemical reactions.

Key topics include the following:

  • Experimental characterization and validation of energy-intensive equipment (reactors, heat exchangers, separators, thermal storage systems, etc.);
  • High-fidelity numerical modeling (e.g., CFD, multiphase flow, process simulations) for design optimization;
  • Hybrid methods that integrate data-driven techniques (machine learning, reduced-order models) with physics-based simulations;
  • Development of novel measurement techniques, instrumentation, and uncertainty quantification in experiments;
  • Life-cycle assessment and techno-economic analysis of energy-efficient design strategies;
  • Scale-up challenges: bridging lab-scale insights to real-world industrial systems;
  • Advanced energy materials.

This Special Issue seeks to accelerate innovation in renewable energy systems, process intensification, retrofitting, new materials, and sustainable manufacturing. Ultimately, the insights presented here will help researchers and engineers to design more efficient, cost-effective, and environmentally friendly energy technologies.

Prof. Dr. Marek Ochowiak
Dr. Ana Moita
Dr. Szymon Woziwodzki
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 250 words) can be sent to the Editorial Office for assessment.

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

  • energy efficiency
  • numerical simulations
  • experimental methods
  • energy-saving materials
  • process and equipment optimization

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Published Papers (1 paper)

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Research

21 pages, 8044 KB  
Article
The Influence of the Shape of Propeller Impeller Blades on Hydrodynamics and Efficiency
by Jacek Stelmach
Energies 2026, 19(9), 2146; https://doi.org/10.3390/en19092146 - 29 Apr 2026
Viewed by 229
Abstract
With rising energy prices, increasing the efficiency of the mechanical mixing process is becoming an important design issue. It is expected that with propeller impellers, efficiency can be increased by changing the shape and/or pitch of the blades. Three-blade propeller mixers with five [...] Read more.
With rising energy prices, increasing the efficiency of the mechanical mixing process is becoming an important design issue. It is expected that with propeller impellers, efficiency can be increased by changing the shape and/or pitch of the blades. Three-blade propeller mixers with five different blade shapes and four strokes (from pb/D = 0.5 to pb/D = 2) were tested. The mixing power (by measuring the torque on the shaft), the pumping capacity (by measuring the axial velocity using the PIV method) and the pressure on the bottom of the stirred tank were determined. Based on the results of the research, it was found that the shape, surface and pitch of the blades affect the pumping efficiency. However, for a specific blade stroke, the effect of blade shape on mixing efficiency is small. Impellers with a small stroke show the best efficiency, and increasing the blade stroke reduces the efficiency of the process. However, the small pitch of the blades means that the liquid stream pumped by the impeller may turn out to be too small for the proper conduct of the process, e.g., obtaining slurries. Therefore, the most commonly used pb/D = 1 pitch turns out to be a good solution. Determining the relationship between pumping efficiency and bottom pressure allows you to determine the liquid stream pumped by the impeller based on the bottom pressure measurement. It has been confirmed that increasing pumping efficiency causes an increase in power demand according to pump theory because propeller impellers show similarities to the rotors of pumps and ship propellers. The theory of ship propellers is much better developed than the theory of mixing. Therefore, the possibility of using it to describe the mixing process could facilitate further research of propeller impellers. It was found that not all dependencies for ship propellers can be used to describe the mixing process. Full article
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