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Entropy
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Advances in Solar Thermal Technologies
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Advances in Solar Thermal Technologies

A special issue of Entropy (ISSN 1099-4300). This special issue belongs to the section "Thermodynamics".

Deadline for manuscript submissions: closed (31 March 2022) | Viewed by 5556

Special Issue Editors

Dr. Jayanta Deb Mondol

E-Mail Website
Guest Editor
Belfast School of Architecture and the Built Environment, Centre for Sustainable Technologies, Ulster University, Belfast BT15 1ED, UK
Interests: solar photovoltaics; solar thermal; energy efficiency; solar concentrator; renewable energy
Special Issues, Collections and Topics in MDPI journals
Dr. Mervyn Smyth

E-Mail Website
Guest Editor
Belfast School of Architecture and the Built Environment, Centre for Sustainable Technologies, Ulster University, Newtownabbey BT37 0ZQ, UK
Interests: solar thermal systems; PVS; energy and the wine industry; anaerobic digestion; building integrated solar
Dr. Biplab Das

E-Mail Website
Assistant Guest Editor
Department of Mechanical Engineering, National Institute of Technology Silchar, Assam, India
Interests: solar thermal system; heat transfer; energy storage; bio fuel; artificial intelligence

Special Issue Information

Dear Colleagues,

Advanced solar thermal technologies are emerging as key renewable technologies to address the world’s growing demand for energy and environmental issues. These year-old technologies have been gaining popularity recently due to their continuous improvement in performance and reduction of costs. This Special Issue is intended to give a platform to the wide range of researchers to share a comprehensive overview of cutting-edge and innovative ideas, concepts, and designs, performance optimization using entropy generation analysis that are being pursued to develop solar thermal technologies and systems, as well as related interdisciplinary research areas, space heating, dehumidification, refrigeration, etc. The latest research on the topic will provide the readers with novel ideas and methods for devising next-generation solutions to practical applications.

Related topics include but are not limited to:

  • Entropy generation and exergy analysis on solar thermal systems;
  • Advances in solar collectors (flat plate; evacuated tube, etc.);
  • Concentrated solar power;
  • Direct and indirect solar drying system;
  • Space heating technologies;
  • Earth tube heat exchangers;
  • Cooling and heating plant;
  • Organic Rankin cycle;
  • Distillation and desalination;
  • Solar cooking system;
  • Thermal energy modeling for solar thermal systems. 

Dr. Jayanta Deb Mondol
Dr. Mervyn Smyth
Dr. Biplab Das
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. Entropy is an international peer-reviewed open access monthly 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

  • entropy generation
  • solar thermal
  • space heating
  • solar cooking
  • organic Rankine cycle

Published Papers (2 papers)

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Research

17 pages, 3268 KiB  
Article
Multi-Objective Optimization of Braun-Type Exothermic Reactor for Ammonia Synthesis
by Tianchao Xie, Shaojun Xia and Chao Wang
Entropy 2022, 24(1), 52; https://doi.org/10.3390/e24010052 - 28 Dec 2021
Cited by 12 | Viewed by 1942
Abstract
The exothermic reactor for ammonia synthesis is a primary device determining the performance of the energy storage system. The Braun-type ammonia synthesis reactor is used as the exothermic reactor to improve the heat release rate. Due to the entirely different usage scenarios and [...] Read more.
The exothermic reactor for ammonia synthesis is a primary device determining the performance of the energy storage system. The Braun-type ammonia synthesis reactor is used as the exothermic reactor to improve the heat release rate. Due to the entirely different usage scenarios and design objectives, its parameters need to be redesigned and optimized. Based on finite-time thermodynamics, a one-dimensional model is established to analyze the effects of inlet gas molar flow rate, hydrogen–nitrogen ratio, reactor length and inlet temperature on the total entropy generation rate and the total exothermic rate of the reactor. It’s found that the total exothermic rate mainly depends on the inlet molar flow rate. Furthermore, considering the minimum total entropy generation rate and maximum total exothermic rate, the NSGA-II algorithm is applied to optimize seven reactor parameters including the inlet molar flow rate, lengths and temperatures of the three reactors. Lastly, the optimized reactor is obtained from the Pareto front using three fuzzy decision methods and deviation index. Compared with the reference reactor, the total exothermic rate of the optimized reactor is improved by 12.6% while the total entropy generation rate is reduced by 3.4%. The results in this paper can provide some guidance for the optimal design and application of exothermic reactors in practical engineering. Full article
(This article belongs to the Special Issue Advances in Solar Thermal Technologies)
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29 pages, 3215 KiB  
Article
Thermo-Economic Evaluation of Aqua-Ammonia Solar Absorption Air Conditioning System Integrated with Various Collector Types
by Adil Al-Falahi, Falah Alobaid and Bernd Epple
Entropy 2020, 22(10), 1165; https://doi.org/10.3390/e22101165 - 16 Oct 2020
Cited by 5 | Viewed by 2918
Abstract
The main objective of this paper is to simulate solar absorption cooling systems that use ammonia mixture as a working fluid to produce cooling. In this study, we have considered different configurations based on the ammonia–water (NH3–H2O) cooling cycle [...] Read more.
The main objective of this paper is to simulate solar absorption cooling systems that use ammonia mixture as a working fluid to produce cooling. In this study, we have considered different configurations based on the ammonia–water (NH3–H2O) cooling cycle depending on the solar thermal technology: Evacuated tube collectors (ETC) and parabolic trough (PTC) solar collectors. To compare the configurations we have performed the energy, exergy, and economic analysis. The effect of heat source temperature on the critical parameters such as coefficient of performance (COP) and exegetic efficiency has been investigated for each configuration. Furthermore, the required optimum area and associated cost for each collector type have been determined. The methodology is applied in a specific case study for a sports arena with a 700~800 kW total cooling load. Results reveal that (PTC/NH3-H2O)configuration gives lower design aspects and minimum rates of hourly costs (USD 11.3/h) while (ETC/NH3-H2O) configuration (USD 12.16/h). (ETC/NH3-H2O) gives lower thermo-economic product cost (USD 0.14/GJ). The cycle coefficient of performance (COP) (of 0.5). Full article
(This article belongs to the Special Issue Advances in Solar Thermal Technologies)
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