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Journals
Processes
Special Issues
Design and Optimization of Clean Energy Systems
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Design and Optimization of Clean Energy Systems

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Energy Systems".

Deadline for manuscript submissions: closed (19 July 2023) | Viewed by 5911

Special Issue Editors

Dr. Yimin Zeng

E-Mail Website
Guest Editor
Natural Resources Canada, Hamilton, ON L8P 0A5, Canada
Interests: clean energy production; corrosion; materials science
Special Issues, Collections and Topics in MDPI journals
Dr. Kaiyang Li

E-Mail Website
Guest Editor
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
Interests: biomaterial; corrosion; metal oxides; steel

Special Issue Information

Dear Colleagues,

The global demands on economic, environmental, and social development have accelerated the design, optimization, and deployment of clean energy systems in a timely fashion. Clean energy refers to energy originating from renewable and zero-emission sources which do not damage the environment, as well as energy saved by energy-efficient systems. The design and optimization of existing and next-generation clean energy systems can offer practical solutions to address the environmental impacts of energy production and use and the limited nature of traditional energy resources in a clean, reliable, and affordable way. Over the past few decades, tremendous efforts have been employed in this field to create a clean energy system with high efficiency, sustainable utilization, affordability, energy security, efficient environmental protection, etc. The principal aim of this Special Issue is to provide a platform for the most up-to-date scientific research, developments, and field applications regarding the design and optimization of various promising clean energy systems. Papers related to energy conversion technologies (advanced turbines and engines, fuel cells, batteries, cogeneration and polygeneration, etc.), energy storage systems (thermal, chemical, mechanical, electrochemical, hydrogen, etc.), energy-generation sources (solar, wind, biomass, water, geothermal, nuclear, etc.), emission control strategies (carbon capture, utilization, and storage, efficiency improvement, and waste to energy), and materials technology challenges under the umbrella of clean energy processing are all well within the range of interests in this Special Issue. Authors are welcome to submit related articles to this issue to share latest trends and promote the development of clean energy systems. All the papers submitted for publication in this section will undergo a peer-review process, and the final decisions will be made based on the recommendations of independent reviewers.

Dr. Yimin Zeng
Dr. Kaiyang Li
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. Processes 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 2400 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

  • clean energy
  • design and optimization
  • conversion
  • storage
  • clean energy sources
  • materials technology

Published Papers (3 papers)

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Research

18 pages, 6753 KiB  
Article
Transient Simulation and Optimization for the Integral Hoisting of Extra-Large Air Separation Cold Box
by Zheming Tong, Sheng He, Shuiguang Tong, Yisong Han and Xudong Peng
Processes 2023, 11(7), 2143; https://doi.org/10.3390/pr11072143 - 18 Jul 2023
Viewed by 891
Abstract
The cold box is a crucial component for cryogenic distillation in air separation units. With the increasing focus on energy conservation and emissions reduction, the integral hoisting of the cold box has emerged as a viable alternative to traditional cold box installation due [...] Read more.
The cold box is a crucial component for cryogenic distillation in air separation units. With the increasing focus on energy conservation and emissions reduction, the integral hoisting of the cold box has emerged as a viable alternative to traditional cold box installation due to its highly efficient performance, short cycle time, and superior integration capabilities. Nonetheless, there are concerns surrounding the large size and weight of these boxes, as well as their eccentric structure, which can cause significant challenges during the integral hoisting process and pose safety hazards. To address these issues, this paper proposes a method for optimizing the lifting point of an extra-large cold box through dynamic simulation under actual working conditions. Firstly, a transient structure FEM simulation was carried out using multi-type mesh coupling based on the operating conditions of an extra-large cold box. Secondly, the posture and strength of the box during the hoisting process were analyzed to determine the most dangerous working conditions. Finally, the maximum equivalent stress of the trusses was employed as the fitness function of the particle swarm algorithm to optimize the lifting point position in the whole parameter range. The findings indicated that the most dangerous situation during the hoisting process occurred near the 0° working condition in the flip-up process and that optimizing the lifting point position based on this working condition significantly reduced the stress levels on the trusses. Full article
(This article belongs to the Special Issue Design and Optimization of Clean Energy Systems)
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25 pages, 3562 KiB  
Article
Pinch-Based General Targeting Method for Predicting the Optimal Capital Cost of Heat Exchanger Network
by Dianliang Fu, Qixuan Li, Yan Li, Yanhua Lai, Lin Lu, Zhen Dong and Mingxin Lyu
Processes 2023, 11(3), 923; https://doi.org/10.3390/pr11030923 - 17 Mar 2023
Cited by 2 | Viewed by 1789
Abstract
Pinch analysis is vital in optimizing heat exchanger networks (HENs). Targeting methods are used when determining cost effectiveness with pinch analysis. However, the existing targeting methods for the capital cost of HEN are not suitable for wide application scenarios. Therefore, we developed a [...] Read more.
Pinch analysis is vital in optimizing heat exchanger networks (HENs). Targeting methods are used when determining cost effectiveness with pinch analysis. However, the existing targeting methods for the capital cost of HEN are not suitable for wide application scenarios. Therefore, we developed a high-accuracy general capital-cost-targeting method. It is built on a final structure that was evolved from the spaghetti structure of HEN through four loop elimination stages. This structure helps to reduce the prediction deviation of the method. To achieve high adaptability while establishing this method, we considered the different heat exchanger cost categories, different cost laws for one stream pair, and area limitations of heat exchangers that may be encountered in practice. In addition, allowing streams to use individual temperature difference contributions enhances the method’s predictive capacity. The potential defects of the method found in numerical experiments and case studies were corrected with improvement measures. As a result, the accuracy and stability of the targeting method were further enhanced, with absolute target deviations generally within 10% and often within 5%. This study provides a benchmark for the optimal capital cost of HEN, allowing for a better economic effect when applying pinch analysis. Full article
(This article belongs to the Special Issue Design and Optimization of Clean Energy Systems)
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17 pages, 16134 KiB  
Article
Surface Modified CoCrFeNiMo High Entropy Alloys for Oxygen Evolution Reaction in Alkaline Seawater
by Zhibin Chen, Kang Huang, Tianyi Zhang, Jiuyang Xia, Junsheng Wu, Zequn Zhang and Bowei Zhang
Processes 2023, 11(1), 245; https://doi.org/10.3390/pr11010245 - 12 Jan 2023
Cited by 6 | Viewed by 2709
Abstract
Electrolysis of seawater is a promising technique to desalinate seawater and produce high-purity hydrogen production for freshwater and renewable energy, respectively. For the application of seawater electrolysis technique on a large scale, simplicity of manufacture method, repeatability of catalyst products, and stable product [...] Read more.
Electrolysis of seawater is a promising technique to desalinate seawater and produce high-purity hydrogen production for freshwater and renewable energy, respectively. For the application of seawater electrolysis technique on a large scale, simplicity of manufacture method, repeatability of catalyst products, and stable product quality is generally required in the industry. In this work, a facile, one-step, and metal salt-free fabrication method was developed for the seawater-oxygen-evolution-active catalysts composed of CoCrFeNiMo layered double hydroxide array self-supported on CoCrFeNiMo high entropy alloy substrate. The obtained catalysts show improved performance for oxygen evolution reaction in alkaline artificial seawater solution. The best-performing sample delivered the current densities of 10, 50, and 100 mA cm−2 at low overpotentials of 260.1, 294.3, and 308.4 mV, respectively. In addition, high stability is also achieved since no degradation was observed over the chronoamperometry test of 24 h at the overpotential corresponding to 100 mA cm−2. Furthermore, a failure mechanism OER activity of multi-element LDHs catalysts was put forward in order to enhance catalytic performance and design catalysts with long-term durability. Full article
(This article belongs to the Special Issue Design and Optimization of Clean Energy Systems)
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