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Heat Transfer Analysis: Recent Challenges and Applications—2nd Edition
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Heat Transfer Analysis: Recent Challenges and Applications—2nd Edition

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "J1: Heat and Mass Transfer".

Deadline for manuscript submissions: 20 March 2026 | Viewed by 903

Special Issue Editors

Prof. Dr. Andrzej Frąckowiak

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Guest Editor
Institute of Thermal Engineering, Poznan University of Technology, 60-965 Poznan, Poland
Interests: thermodynamics; fluid mechanics; numerical methods
Special Issues, Collections and Topics in MDPI journals
Dr. Bartosz Ciupek

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Guest Editor
Department of Fuels and Renewable Energy, Faculty of Environmental Engineering and Energy, Institute of Thermal Energy, Poznan University of Technology, 60-965 Poznan, Poland
Interests: combustion; fuels; boilers; air protection; heat exchange; combustion chambers
Special Issues, Collections and Topics in MDPI journals
Dr. Łukasz Brodzik

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Guest Editor
Institute of Thermal Energy, Poznan University of Technology, 3 Piotrowo Street, 61-138 Poznan, Poland
Interests: thermodynamics; mathematics; engineering; mechanics; energy and fuels
Special Issues, Collections and Topics in MDPI journals
Dr. Wojciech Prokopowicz

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Guest Editor
Ministry of National Defense, 00-911 Warsaw, Poland
Interests: thermodynamics; fluid mechanics; numerical methods; vibroacoustics

Special Issue Information

Dear Colleagues,

We are pleased to invite you to contribute to this Special Issue.

Its scope covers contemporary directions and perspectives in the application of heat transfer processes. Particular attention is devoted to analyses, simulations, and optimization approaches related to energy systems and devices, with an emphasis on environmentally friendly solutions. We encourage submissions that present original research results of high scientific quality, as well as practical applications and innovative approaches. Review papers that synthesize the state of the art in this area are also highly valued. Contributions focusing on enhancing the thermal efficiency of machines and installations, reducing energy losses, and supporting the transition toward more sustainable technologies will be especially appreciated.

Prof. Dr. Andrzej Frąckowiak
Dr. Bartosz Ciupek
Dr. Łukasz Brodzik
Dr. Wojciech Prokopowicz
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

  • heat transfer
  • convection
  • radiation
  • thermal optimization
  • thermal efficiency
  • CFD modeling
  • environmental protection

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Related Special Issue

Published Papers (2 papers)

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Research

14 pages, 2827 KB  
Article
Analysis of Heat Transfer Characteristics in a Latent Heat Storage Module Using Circular-Finned Tubes
by Ji-Woon Ko, Tae Hwan Song, Jong-Hoon Lee, Jong Hyeon Peck and Seung Jin Oh
Energies 2025, 18(23), 6325; https://doi.org/10.3390/en18236325 - 1 Dec 2025
Viewed by 219
Abstract
Latent heat thermal energy storage (LHTES) using inorganic salt hydrates is a promising technology for buffering renewable energy fluctuations; however, phase-dependent heat transfer remains insufficiently understood for design optimization. In this study, a shell-and-tube storage module with a circular-finned tube was constructed and [...] Read more.
Latent heat thermal energy storage (LHTES) using inorganic salt hydrates is a promising technology for buffering renewable energy fluctuations; however, phase-dependent heat transfer remains insufficiently understood for design optimization. In this study, a shell-and-tube storage module with a circular-finned tube was constructed and filled with 13.17 kg of barium hydroxide octahydrate (BHO). Discharge tests were conducted with heat transfer fluid (HTF) inlet temperatures ranging from 20 °C to 50 °C and flow rates of 10–25 L/min, while charging was performed at 90 °C. The overall heat transfer coefficient (Uo) was derived using the logarithmic mean temperature difference method, the inside coefficient (hi) was calculated by the Petukhov correlation, and the outside coefficient (ho) was obtained via thermal-resistance network. Results show that the average discharge energy was approximately 1.027 kWh (except 0.859 kWh at 50 °C inlet), with a mean utilization efficiency of 79.25%. The Uo was consistently highest in the liquid phase, followed by the latent and solid phases, with ranges of 0.257–0.863, 0.025–0.072, and 0.015–0.044 kW/m2·°C, respectively. Sensitivity analysis revealed that the HTF flow rate strongly influenced Uo across all phases, whereas inlet temperature played only a minor role. The outside coefficient ho was 0.033–0.162 kW/m2·°C in the latent regime and 0.018–0.064 kW/m2·°C in the solid regime, with a notable peak around Reynolds number 1.3 × 104 in the latent phase. These findings provide detailed phase-resolved Uo and ho data for inorganic salt hydrate storage and highlight design insights such as the diminishing returns of flow rate increase beyond a threshold, offering valuable guidelines for sizing and operation of LHTES in Power-to-Heat applications. Full article
(This article belongs to the Special Issue Heat Transfer Analysis: Recent Challenges and Applications—2nd Edition)
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30 pages, 16086 KB  
Article
Conjugate Study on Thermal–Hydraulic Performance of Topology-Optimized Lattice-Filled Cooling Channel for Thermal Management of Solid-Oxide Fuel Cells
by Kirttayoth Yeranee, Yuli Cheng and Yu Rao
Energies 2025, 18(22), 6001; https://doi.org/10.3390/en18226001 - 15 Nov 2025
Viewed by 507
Abstract
Integrated additional cooling channels offer precise thermal management for solid-oxide fuel cells (SOFCs), mitigating temperature gradients. This research studies the thermal–hydraulic performance of cooling channels integrated between SOFC interconnectors, including a Diamond-type triply periodic minimal surface (TPMS), a conventional topology-optimized structure, and a [...] Read more.
Integrated additional cooling channels offer precise thermal management for solid-oxide fuel cells (SOFCs), mitigating temperature gradients. This research studies the thermal–hydraulic performance of cooling channels integrated between SOFC interconnectors, including a Diamond-type triply periodic minimal surface (TPMS), a conventional topology-optimized structure, and a topology-optimized lattice-filled structure. A conjugate heat transfer analysis is employed to investigate the influences of flow rate within the range of Reynolds numbers from 300 to 5000, and the effects of coolant type, including air and liquid metals, as well as the impacts of structural material. The results demonstrate that the topology-optimized lattice-filled structure, generating high turbulence mixing, achieves superior temperature uniformity, especially at high flow rates, despite having higher thermal resistance and pressure loss than the conventional topology-optimized design. The coolant types show the largest influence on thermal–hydraulic performance, and the use of liquid gallium in the conventional optimized design obtains the best temperature uniformity, yielding differences between the maximum and minimum temperatures of less than 5 K. Moreover, the higher-thermal-conductivity material improves temperature uniformity, even at low flow rates. Overall, the optimized-baffle designs in the conventional topology-optimized model, utilizing high-conductivity coolant and structural materials, could be the most suitable for thermal management of the SOFC. Full article
(This article belongs to the Special Issue Heat Transfer Analysis: Recent Challenges and Applications—2nd Edition)
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