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New Technologies for Waste Heat Recovery
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New Technologies for Waste Heat Recovery

A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Waste and Recycling".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 3950

Special Issue Editors

Dr. Weifeng He

E-Mail Website
Guest Editor
College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Interests: desalination; heat and mass transfer; turbomachinery; energy conservation and recovery; renewable energy
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Majid Amidpour

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering, K. N. Toosi University of Technology, Tehran, Iran
Interests: desalination; water-energy nexus; process integration; constructal theory; energy savings; renewable energy
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jiangfeng Wang

E-Mail Website
Guest Editor
School of Energy & Power Engineering, Xi’an Jiaotong University, Xi’an, China
Interests: waste heat recovery; distributed energy system; renewable energy; advanced power cycle; turbomachinery
Dr. Zhixin Sun

E-Mail Website
Guest Editor
School of Chemical Engineering, Fuzhou University, Fuzhou, Fujian, China
Interests: waste heat recovery; LNG cold energy recovery; power to ammonia system; energy conversion system optimization

Special Issue Information

Dear Colleagues,

A large amount of heat waste is produced from industries all over the world, mainly as a result of consumed fossil fuels. Discharging waste heat directly into the environment can result in energy and pollution problems. Waste heat recovery (WHR) is an effective technology used to convert the efficiency of all types of energy. Highly efficient and cost-effective, WHR technologies are especially useful and popular in eliminating the adverse impacts of waste heat emission in the current market.

Innovative methods focusing on WHR have been proposed and investigated over the past few years for the purpose of energy conservation. However, there are gaps in the research and there is still great potential to find new technologies or improve the previous schemes to achieve a more practical and economical target. The main aim of this Special Issue on “New Technologies for Waste Heat Recovery” is to introduce technologies with high efficiency and low emission and cost. The main topics are given out as follows:

  • Proposing new, innovative WHR technologies and demonstrating the corresponding principles;
  • On-design, off-design performance investigations and optimization of the WHR technologies in different fields, including industry and life occasions, such as building, power generation, desalination, refrigeration, heating, evaporation and crystallization, and so on;
  • Environmental and economical evaluation of the applications of WHR technologies;
  • New application schemes of WHR technologies;
  • Energy conversion and heat and mass transfer in WHR technologies;
  • Design and optimization of the core devices in WHR applications;
  • Evaluating and improving the reliability and resiliency of WHR technologies;
  • Control strategy and algorithm for WHR technologies.

This Special Issue aims to investigate innovative technologies for waste heat recovery in different areas to initiate positive impacts both on society and science. The new methods and research conducted from this worldwide scientific collaboration will promote the widespread implementation of WHR technologies and the relevant application systems.

Dr. Weifeng He
Prof. Dr. Majid Amidpour
Prof. Dr. Jiangfeng Wang
Dr. Zhixin Sun
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. Sustainability 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 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

  • waste heat recovery (WHR)
  • energy conversion efficiency
  • energy conservation
  • optimization
  • environmental and economical evaluating
  • reliability and resiliency
  • control strategy and algorithm

Published Papers (2 papers)

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Research

24 pages, 3628 KiB  
Article
Technical-Economic Analysis of Energy Efficiency Solutions for the Industrial Steam System of a Natural Gas Processing Plant
by Mohsen Salimi, Majid Amidpour, Mohammad Ali Moradi, Marjan Hajivand, Ebrahim Siahkamari and Mehrzad Shams
Sustainability 2023, 15(20), 14995; https://doi.org/10.3390/su152014995 - 18 Oct 2023
Viewed by 1366
Abstract
Steam, which is primarily employed as a heat transfer medium in process plants, is one of the most widely utilized energy carriers in the industrial sector. One of the factors that affects the cost of steam is how well the condensate collection, steam [...] Read more.
Steam, which is primarily employed as a heat transfer medium in process plants, is one of the most widely utilized energy carriers in the industrial sector. One of the factors that affects the cost of steam is how well the condensate collection, steam supply, and return systems of industrial steam systems perform. In a case study, the steam systems of a natural gas processing plant were simulated. The amount of demineralized water loss and, consequently, the identification of various solutions to improve the system were analyzed. The whole steam system was simulated using the MEASUR software platform (v 1.2), and by placing the operational information of the steam system, it was possible to create a baseline for the system, model saving solutions, and finally, provide a technical and economic evaluation of the solutions. Due to the high loss of steam condensate in the SRU steam system (more than 3000 kg per hour), solutions to improve the energy efficiency of the SRU steam system in the form of a maximum recovery of steam condensate (replacement of defective steam traps, redesign of the low-pressure condensate collection network, and high-pressure waste condensate collection) were evaluated with two price assumptions of current energy prices and real prices (the energy saving value of one cubic meter of natural gas is equal to 13 cents). The results show that, for current prices, the investment return period will be between 11.8 and 3.8 months. Moreover, in the main steam system of the refinery (unit 9200), there are three solutions: replacing and repairing defective steam traps, installing an expansion turbine instead of a steam pressure relief valve (PRV), and other solutions (including increasing boiler efficiency, automatic control of the boiler, and energy recovery boiler blowdown) under two price assumptions, the current and real prices of natural gas and demineralized water, were evaluated, and the modeling results show that the investment return period for each of the above solutions at the current prices is 10.2, 186, and 13.3, respectively. The investment return period is based on assuming real fuel and BFW prices are equal to 2.0, 37.6, and 1.7, respectively. Full article
(This article belongs to the Special Issue New Technologies for Waste Heat Recovery)
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19 pages, 2102 KiB  
Article
Thermal Performance Characteristics of an 80-Ton Variable-Thrust Liquid Engine for Reusable Launch Rockets
by Zhaohui Yao, Shan Zhou, Tianlin Yang and Yani Han
Sustainability 2023, 15(8), 6552; https://doi.org/10.3390/su15086552 - 12 Apr 2023
Cited by 1 | Viewed by 1967
Abstract
In this paper, an 80-ton thrust liquid rocket engine (hereinafter referred to as an LRE) with a gas generator cycle, a 5:1 thrust throttling ratio, and an integrated flow regulator/gas generator (hereinafter referred to as an IFRGG) is analyzed. This LRE can be [...] Read more.
In this paper, an 80-ton thrust liquid rocket engine (hereinafter referred to as an LRE) with a gas generator cycle, a 5:1 thrust throttling ratio, and an integrated flow regulator/gas generator (hereinafter referred to as an IFRGG) is analyzed. This LRE can be used during the first stage of launching, second-stage and upper-stage space missions, and moon/mars low-orbit hovering and soft landing, and it can also be used with various near-space multipurpose flight vehicles. The thermal performance model of the variable-thrust LRE is established, the influence of the main LRE design parameters on the performance optimization is analyzed, and an optimal selection of the design parameters under certain constraints is completed. A performance evaluation was successfully conducted, and we determined the main structural parameters at the sea-level design point; additionally, we evaluated the LRE performance, matched the system parameters under a 100–20% variable-thrust operation, and conducted an analysis on the LRE operating characteristics under a wide range of variable-thrust operations. The LOX/kerosene propellants were selected, and the vacuum-specific impulse of the LRE decreased from 303.2 s to 289.2 s; this followed an approximate linear law, with a decrease of about 4.62% when the thrust was varied in the wide range of 100–20%. The variable-thrust LRE still had a better vacuum performance under a very deep throttling condition. The reason why the specific impulse was low under the deep throttling condition is that it was greatly affected by the different atmospheric pressure that was caused by the varying flight height and the insufficient atomization and combustion of the propellant; however, because of its wide range of variable-thrust working abilities, it is suitable for various special flight missions. Full article
(This article belongs to the Special Issue New Technologies for Waste Heat Recovery)
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