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New Advances in Heat and Mass Transfer and Thermal Management in Energy Systems

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

Deadline for manuscript submissions: 15 May 2024 | Viewed by 2858

Special Issue Editors

Dr. Qianghui Xu

E-Mail Website
Guest Editor
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: mechanism and model of heat and mass transfer in porous media with multiple physicochemical coupling; natural gas hydrate development technology; thermochemical energy storage technology; thermal control technology for high heat flux systems
Dr. Zhilong Cheng

E-Mail Website
Guest Editor
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: heat transfer with phase change in porous media; thermal management/protection technology for high heat flux devices; topology design and optimization of TPMS-based heat exchanger
Dr. Junyu Yang

E-Mail Website
Guest Editor
Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
Interests: multiphysics in porous media; lattice boltzmann method; natural gas development technique

Special Issue Information

Dear Colleagues,

The field of energy systems is undergoing rapid evolution, driven by a growing emphasis on efficient and sustainable practices. In this context, the roles of heat and mass transfer are of utmost importance in the performance and optimization of various energy systems. Efficient heat transfer is crucial for enhancing the performance of power generation technologies, including thermal power plants, energy storage systems, and concentrated solar power systems. It directly influences the conversion of thermal, mechanical, and electrical energy, thereby impacting overall energy efficiency. Similarly, mass transfer processes are critical in applications such as fuel cells, batteries, and gas separation systems, where the transport of reactants and products is essential for energy conversion and storage. Notably, heat and mass transfer processes are often intricately coupled, adding complexity to the physics involved. Consequently, it is paramount to understand and optimize these transfer processes in order to improve energy efficiency, reduce environmental impact, and promote sustainable energy practices.

In this Special Issue on "New Advances in Heat and Mass Transfer and Thermal Management in Energy Systems", we aim to emphasize the importance of heat and mass transfer in the context of energy systems. We seek to explore innovative research, novel techniques, and cutting-edge developments that address the challenges and opportunities in this field.

Contributions to this Special Issue can cover a broad range of topics related to heat and mass transfer in energy systems, including, but not limited to, the following:

  • Heat transfer enhancement techniques: Research papers that explore various strategies to enhance heat transfer in energy systems, such as nanofluids, phase change materials, porous media, and advanced surface coatings. Investigations into heat transfer intensification methods, including turbulence promotion and optimization of flow configurations, are also welcome.
  • Mass transfer phenomena in energy systems: Contributions addressing mass transfer processes in energy conversion and storage systems, such as fuel cells, batteries, and adsorption systems. This includes studies on mass transfer kinetics, diffusion, and adsorption/desorption mechanisms, with a focus on improving performance and efficiency.
  • Thermal management in energy systems: Papers that discuss innovative thermal management techniques for energy systems, including active/passive cooling methods, thermal energy storage, waste heat recovery, and thermal interface materials. The development of advanced cooling strategies for electronics, power electronics, and electric vehicle systems is also of interest.
  • Computational modeling and simulation: Research papers utilizing advanced numerical and computational techniques to study heat and mass transfer phenomena in energy systems. This includes the development of computational models, simulation algorithms, and optimization methods for improving energy system performance.

We invite researchers and experts from academia, industry, and government institutions to contribute their original work to this Special Issue. We believe that this collection of articles will provide valuable insights into the importance of heat and mass transfer in energy systems and present novel advancements that contribute to the development of efficient and sustainable energy practices.

Thank you for your attention, and we look forward to receiving your contributions.

Dr. Qianghui Xu
Dr. Zhilong Cheng
Dr. Junyu Yang
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.

Published Papers (4 papers)

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Research

15 pages, 3975 KiB  
Article
Experimental Investigation of Injection and Production Cycles for Limestone Reservoirs via Micro-CT: Implications for Underground Gas Storage
by Mengyu Wang, Guanqun Wang, Yong Hu, Yuan Zhou, Wei Li, Dan Han, Zihan Zhao, Xia Wang, Longxin Li and Wei Long
Energies 2024, 17(6), 1503; https://doi.org/10.3390/en17061503 - 21 Mar 2024
Viewed by 389
Abstract
Global demand for underground gas storage (UGS) is steadily increasing, with the limestone-based UGS system situated in the Sichuan Basin of China gathering considerable interest in recent years. However, studies focusing on the fundamental mechanisms of the injection-production process in these systems are [...] Read more.
Global demand for underground gas storage (UGS) is steadily increasing, with the limestone-based UGS system situated in the Sichuan Basin of China gathering considerable interest in recent years. However, studies focusing on the fundamental mechanisms of the injection-production process in these systems are limited. Moreover, existing studies utilizing physical experimental methods frequently fall short in effectively visualizing micro-flow or incorporating real core samples from the reservoir. To address these gaps, we performed a coreflood experiment, integrating micro-Computed Tomography (CT) scanning to investigate mechanisms of fluid flow and storage capacity during the injection and production cycles in limestone reservoirs. Our approach involved utilizing core plugs with artificially engraved fracture-vuggy structures, which mimic the characteristics of the reservoir. Micro-CT scans were performed to visualize the microscopic changes in fractured-vuggy structures and the distribution of irreducible water during each cycle. This study reveals that increased cycles correspondingly affect gas storage capacity, particularly by expanding it in relative larger vuggy structures while reducing it in finer fissure network structures. The amount of irreducible water decreases after injection-production cycles, likely being expelled alongside the extracted dry gas. This plays a critical role in expanding the storage capacity in larger vuggy systems. Conversely, there is a decrease in storage capacity within fissure network systems, as the irreducible water is replaced by gas. This leads to a reduction in the opening force of the fine conduit. The dense matrix has a very limited effect on the flow mechanism and its influence on storage capacity. Overall, these findings offer practical insights for optimizing injection and production strategies in limestone UGS systems within the Sichuan Basin, contributing to a deeper understanding and efficient utilization of this vital infrastructure. Full article
(This article belongs to the Special Issue New Advances in Heat and Mass Transfer and Thermal Management in Energy Systems)
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12 pages, 10923 KiB  
Article
Frost-Preventing Design for Space Station Refrigerator
by Dongcai Guo, Teng Dou, Hui Zou, Yadong Zhao and Qiang Sheng
Energies 2023, 16(23), 7801; https://doi.org/10.3390/en16237801 - 27 Nov 2023
Viewed by 596
Abstract
Different preservation temperatures for sample storage in space stations and corresponding refrigerator devices have been designed. In the below-freezing environment, frost will occur on the inner wall surface and the sealing place of the refrigerator device, which may have an impact on the [...] Read more.
Different preservation temperatures for sample storage in space stations and corresponding refrigerator devices have been designed. In the below-freezing environment, frost will occur on the inner wall surface and the sealing place of the refrigerator device, which may have an impact on the operating performance and sealing performance of the refrigerator device. This paper analyzes the impact of frost on refrigerator storage devices, and designs and verifies a scheme of air cooling with a hollow seal method to reduce the impact of frost. The designed refrigerator was tested for air cooling, sealing, and long-term performance. The tests show that the air-cooling structure designed in this paper can effectively reduce the frost on the sample surface. A cumulative helium mass spectrometry leak detection method is applied to verify that the hollow seal structure designed has a better sealing property, which can prevent the diffusion of water vapor and frosting at the sealing position. The design with air cooling and hollow sealing has less frost and more stable performance for long-term operation. The results demonstrate this refrigerator would have the capability of operating on-orbit. The frost-preventing method for space station refrigerator designed in this paper has significance for the design of similar cryogenic equipment in microgravity environments. Full article
(This article belongs to the Special Issue New Advances in Heat and Mass Transfer and Thermal Management in Energy Systems)
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16 pages, 7323 KiB  
Article
A New Multi-Scale Method to Evaluate the Porosity and MICP Curve for Digital Rock of Complex Reservoir
by Ting Xiong, Ming Chen, Yuan Jin, Wei Zhang, Haipeng Shao, Guanqun Wang, Ethan Long and Wei Long
Energies 2023, 16(22), 7613; https://doi.org/10.3390/en16227613 - 16 Nov 2023
Cited by 2 | Viewed by 627
Abstract
The evaluation of rock porosity and the mercury injection capillary pressure (MICP) curve is fundamental for oil and gas exploration and production. Digital rock (DR) technology, incorporating 3D micro-CT imaging and numerical methods, has been widely employed to predict these properties. However, analyzing [...] Read more.
The evaluation of rock porosity and the mercury injection capillary pressure (MICP) curve is fundamental for oil and gas exploration and production. Digital rock (DR) technology, incorporating 3D micro-CT imaging and numerical methods, has been widely employed to predict these properties. However, analyzing the pore structure of heterogeneous rocks, such as fractured rocks or glutenite, solely through single-scale DR analysis poses challenges. Existing upscaling methods have limitations in fully representing the complete range of pore structures at different scales, with limited comparison to experimental data. To address this, we propose a novel method that upscales porosity and simulates the MICP curve from nano-scale to core scale by merging results from micro-CT (at resolutions of 35 μm and 2 μm) and SEM (at resolutions of 6.5 nm and 65 nm). We validate the developed DR model by applying it to sandstones, glutenite, and igneous rocks, and achieve excellent agreement between the experimental data and the multi-scale DR model across 67 samples. The results demonstrate that the multi-scale model effectively captures the porosity and pore structures across the entire range. In contrast, the single digital rock (DR) model underestimates the porosity measurements for both homogeneous sandstones and heterogeneous cores. While the MICP model based on a single DR proves suitable for homogeneous rock samples, it introduces noticeable discrepancies when applied to heterogeneous rock samples. The developed multi-scale method significantly enhances the confidence in using DR to assess the pore structure of complex rocks. Full article
(This article belongs to the Special Issue New Advances in Heat and Mass Transfer and Thermal Management in Energy Systems)
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25 pages, 14669 KiB  
Article
Pore-Scale Modeling of Methane Hydrate Dissociation Using a Multiphase Micro-Continuum Framework
by Zhiying Liu, Qianghui Xu, Junyu Yang and Lin Shi
Energies 2023, 16(22), 7599; https://doi.org/10.3390/en16227599 - 16 Nov 2023
Viewed by 557
Abstract
The development of methane hydrate extraction technology remains constrained due to the limited physical understanding of hydrate dissociation dynamics. While recent breakthroughs in pore-scale visualization techniques offer intuitive insights into the dissociation process, obtaining a profound grasp of the underlying mechanisms necessitates more [...] Read more.
The development of methane hydrate extraction technology remains constrained due to the limited physical understanding of hydrate dissociation dynamics. While recent breakthroughs in pore-scale visualization techniques offer intuitive insights into the dissociation process, obtaining a profound grasp of the underlying mechanisms necessitates more than mere experimental observations. In this research, we introduce a two-phase micro-continuum model that facilitates the numerical simulation of methane hydrate dissociation at both single- and multiscale levels. We employed this numerical model to simulate microfluidic experiments and determined the kinetic parameters of methane hydrate dissociation based on experimental data under various dissociation scenarios. The simulations, once calibrated, correspond closely to experimental results. By comprehensively comparing the simulated results with experimental data, the rate constant and the effective diffusion coefficient were reliably determined to be kd = 1.5 × 108 kmol2/(J·s·m2) and Dl = 0.8 × 10−7 m2/s, respectively. Notably, the multiscale model not only matches the precision of the single-scale model but also presents considerable promise for streamlining the simulation of hydrate dissociation across multiscale porous media. Moreover, we contrast hydrate dissociation under isothermal versus adiabatic conditions, wherein the dissociation rate is significantly reduced under adiabatic conditions due to the shifted thermodynamic condition. This comparison highlights the disparities between microfluidic experiments and real-world extraction environments. Full article
(This article belongs to the Special Issue New Advances in Heat and Mass Transfer and Thermal Management in Energy Systems)
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