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Advanced Thermal Systems
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Advanced Thermal Systems

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

Deadline for manuscript submissions: closed (30 June 2022) | Viewed by 5352

Special Issue Editors

Dr. Ivan CK Tam

E-Mail Website
Guest Editor
Associate Professor in Marine Engineering Design & Technology, Newcastle University, Newcastle Research & Innovation Institute, 80 Jurong East Street 21, #05-04, Singapore, Singapore
Interests: engine combustion process; exhaust emission control; energy management; renewable energy; cryogenic technology
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Sara Walker

E-Mail Website
Guest Editor
Professor in Energy, Director of The Centre of Energy, School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
Interests: whole energy systems, low-energy and low-carbon buildings, building-scale renewables, small scale energy storage, and electric vehicle charging/discharging load profiles
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We live in interesting times in which life as we know it is being threatened by humanmade changes to the atmosphere in which we live. On the global scale, concern is focused on climate change due to greenhouse gas emissions, and on a national scale, atmospheric pollution produced by combustion processes is of concern. To meet the dual challenges presented by these factors, consideration needs to be given to energy efficiency and pollution reduction in transport and energy conversion processes. A possible approach is through the development of new ideas, processes, and practices in the application of “Advanced Thermal Systems”. In this Special Issue on "Advanced Thermal Systems”, we welcome review articles and original research papers, fundamental or applied and theoretical, numerical, or experimental, which explore new concepts in power cycles and energy utilization. Topics of interest include, but are not limited to, the following:

  • Power & environment;
  • Optimization techniques;
  • System simulation;
  • Energy storage;
  • Exergy and Second Law analysis;
  • Finite time thermodynamics;
  • Refrigeration and cryogenics;
  • Gas & vapour power;
  • Heat transfer;
  • Combustion processes;
  • Component performance;
  • Organic Rankine cycles;
  • Combined cycles.

Dr. Ivan CK Tam
Prof. Dr. Sara Walker
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

  • power & environment
  • optimization techniques
  • system simulation
  • energy storage
  • exergy and second law analysis
  • finite time thermodynamics
  • refrigeration & cryogenics
  • heat transfer
  • gas & vapour power
  • combustion processes
  • component performance
  • organic Rankine cycles
  • combined cycles

Published Papers (3 papers)

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Research

19 pages, 3195 KiB  
Article
Energy and Exergy Analyses of a Novel Combined Heat and Power System Operated by a Recuperative Organic Rankine Cycle Integrated with a Water Heating System
by Babras Khan and Man-Hoe Kim
Energies 2022, 15(18), 6658; https://doi.org/10.3390/en15186658 - 12 Sep 2022
Cited by 2 | Viewed by 1397
Abstract
This study reports the thermodynamic analysis of a high-temperature recuperative organic Rankine cycle comprising a water heating system that can provide a net power of 585.7 kW and hot water for domestic use at 35 °C. The performance was analysed using seasonal ambient [...] Read more.
This study reports the thermodynamic analysis of a high-temperature recuperative organic Rankine cycle comprising a water heating system that can provide a net power of 585.7 kW and hot water for domestic use at 35 °C. The performance was analysed using seasonal ambient temperature and water temperature data from Seoul, South Korea. The working fluid was separated into two different mass fractions after emerging from the turbine 1 outlet; one fraction provided heat to recuperate the organic Rankine cycle, and the other fraction was transferred to the water heating system for heating water. Mass fractions were balanced based on the projected seasonal need for hot water. Four working fluids with high critical temperatures and five working fluids with low critical temperatures were examined for top and bottom cycles, respectively. Chlorobenzene was selected for the top cycle and R601 was selected for the bottom cycle. The system achievement in individual months was analysed using thermal efficiency and exergy efficiency. Moreover, the performances of the hottest (low hot water demand) and coldest (high hot water demand) months were analysed. Full article
(This article belongs to the Special Issue Advanced Thermal Systems)
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15 pages, 4758 KiB  
Article
Effect of Working Fluid-Filling Ratio Combination on Thermosyphon Performance as Add-In Enhancer for Indoor Air Conditioning Devices
by Ignacio Carvajal-Mariscal, Jorge E. De León-Ruiz, Jorge Vázquez-Arenas and María Venegas
Energies 2022, 15(16), 5939; https://doi.org/10.3390/en15165939 - 16 Aug 2022
Cited by 1 | Viewed by 1386
Abstract
An experimental study is presented to account for the implementation of a two-phase closed thermosyphon pipe, for energy-saving purposes, in air conditioning systems in the context of COVID-19. The experimental setup consisted of a 0.5 m × 0.0127 m type L copper pipe [...] Read more.
An experimental study is presented to account for the implementation of a two-phase closed thermosyphon pipe, for energy-saving purposes, in air conditioning systems in the context of COVID-19. The experimental setup consisted of a 0.5 m × 0.0127 m type L copper pipe which was employed as the body of the heat exchanger; an electric resistance heater of 0.1 m length located at the bottom; and a 0.25 m length water-cooled concentric condenser located at the top. The evaluation was conducted employing acetone, ethanol, and distilled water as working fluids; ranging the heat supplied at the evaporator from 25 to 125 W and the filling ratio from 20% to 40% of the total inner volume of the thermosyphon. From the data obtained, it was found that ethanol is the working fluid most susceptible to changes in operation conditions. Contrarily, distilled water was found to deliver consistent performance, up to a point that, for the analysed setup, it is considered to be independent of both, heat flow supplied at the evaporator and thermosyphon filling ratio. Meanwhile, acetone was found to be the only fluid tested that displays a directly proportional behaviour between heat absorption and dissipation. From compiling experimental data, response surfaces were constructed and used as direct and rough optimization tools. The information provided by this approach is considered to be particularly useful and is introduced for modelling and design purposes. Based on the results, it was found that acetone, within operation ranges of 34%<ϕ<40% and 75 W<Q˙Evap<125 W, was the most suitable working fluid to use in a two-phase closed thermosyphon for energy-saving purposes in air conditioning applications. Full article
(This article belongs to the Special Issue Advanced Thermal Systems)
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11 pages, 3840 KiB  
Article
Development and Examination of an Internally Switchable Thermosiphon
by Immanuel Voigt, Niklas Lütke, Kai Thüsing, Markus Winkler and Welf-Guntram Drossel
Energies 2022, 15(11), 3891; https://doi.org/10.3390/en15113891 - 25 May 2022
Cited by 3 | Viewed by 1424
Abstract
Thermal switches contribute to efficient and safe thermal management of components and overall systems in various technical applications by actively controlling heat transfer in response to varying thermal loads and ambient conditions. Heat pipes are passive heat transfer devices constituting an integral part [...] Read more.
Thermal switches contribute to efficient and safe thermal management of components and overall systems in various technical applications by actively controlling heat transfer in response to varying thermal loads and ambient conditions. Heat pipes are passive heat transfer devices constituting an integral part of various thermal management systems such as in spacecraft or consumer electronics thermal control. Heat pipes also form a promising approach for thermal switches due to their high effective thermal conductivity. In this paper, a wickless copper-water heat pipe based thermal switch with an electromagnetic linear actuator is presented. The magnetically actuated motion of a plunger integrated into the heat pipe affects the latent heat transport cycle leading to a switchable heat transfer. Thermal measurements conducted to determine the total thermal resistance of the heat pipe demonstrate the efficacy of the thermal switch. It was found that the thermal resistance of the heat pipe was increased by up to 53% in off state while the heat pipe performance in on state was not significantly affected by the integrated mechanism. Full article
(This article belongs to the Special Issue Advanced Thermal Systems)
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