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Energies
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Numerical Study of Waste and Exhaust Heat Recovery
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Numerical Study of Waste and Exhaust Heat Recovery

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

Deadline for manuscript submissions: closed (20 January 2026) | Viewed by 2387

Editor

Dr. Hosein Kalantari

E-Mail Website
Guest Editor
Norman B. Keevil Institute of Mining Engineering, The University of British Columbia, Vancouver, BC, V6T 1Z4, Canada
Interests: waste heat recovery systems for mining applications; advanced mine energy system; renewable energy system; mine ventilation; computational fluid dynamics

Special Issue Information

Dear Colleagues,

The demand for efficient waste and exhaust heat recovery systems has grown significantly in recent years due to the increasing focus on sustainability and energy conservation. Waste and exhaust heat recovery technologies have the potential to significantly reduce energy consumption and greenhouse gas emissions in various industrial sectors, including manufacturing, transportation, and power generation. Moreover, these technologies can contribute to the development of more sustainable and environmentally friendly energy systems.

This Special Issue aims to present and disseminate the most recent advances in the numerical study of waste and exhaust heat recovery systems. Topics of interest include, but are not limited to, the following:

  • Numerical modeling and simulation of waste heat recovery systems;
  • Computational fluid dynamics (CFD) analysis of heat exchangers and heat recovery units;
  • Optimization techniques for waste heat recovery systems;
  • Thermal and thermoeconomic analysis of waste heat recovery technologies;
  • Integration of waste heat recovery systems in industrial processes and energy systems;
  • Novel applications of waste and exhaust heat recovery technologies;
  • Performance evaluation and case studies of waste heat recovery systems.

We invite researchers and practitioners to contribute original research articles, review articles, and short communications addressing the aforementioned topics. Submissions should present novel insights, methodologies, and findings that advance the understanding and application of numerical methods in waste and exhaust heat recovery.

Manuscripts should be submitted online at www.mdpi.com/journal/energies by 30 September 2024. All submissions will undergo rigorous peer review, and accepted papers will be published continuously in the journal Energies. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on the journal's website.

We look forward to receiving your contributions to this Special Issue.

Dr. Hosein Kalantari
Guest Editor

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 250 words) can be sent to the Editorial Office for assessment.

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-anonymized 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

  • waste heat recovery
  • exhaust heat recovery
  • numerical modeling
  • computational fluid dynamics
  • optimization
  • thermal analysis
  • thermoeconomics
  • industrial applications

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Published Papers (2 papers)

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Research

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39 pages, 4822 KB  
Article
Enhancing Sustainability Through a Hybrid Organic Rankine Cycle and Hydrogen Production Systems: A Thermo-Economic Analysis
by Biagio Morrone, Andrea Unich, Domenico De Falco, Antonio Mariani and Saif Serag
Energies 2026, 19(8), 1862; https://doi.org/10.3390/en19081862 - 10 Apr 2026
Viewed by 720
Abstract
This study investigates the integration of Organic Rankine Cycle systems with hydrogen production and use to enhance energy efficiency and economic viability in waste heat recovery applications. A comprehensive thermodynamic, exergoeconomic, and environmental assessment evaluates multiple ORC configurations and six working fluids across [...] Read more.
This study investigates the integration of Organic Rankine Cycle systems with hydrogen production and use to enhance energy efficiency and economic viability in waste heat recovery applications. A comprehensive thermodynamic, exergoeconomic, and environmental assessment evaluates multiple ORC configurations and six working fluids across hospital and hotel facilities. The analysis quantifies component-level exergy costs, system-level economics, and operational CO2 emission reductions, focusing on optimal sizing strategies and threshold conditions under which hydrogen storage enhances energy autonomy without compromising economic viability. Results reveal fundamental design trade-offs: Basic ORC achieved the lowest LCOE at 0.033 $/kWh through operational simplicity, while complex configurations extract up to 70% more power at 14–32% higher cost. N-pentane exhibits superior thermodynamic–economic performance in the Parallel Dual ORC configuration, achieving 20% thermal efficiency and 40% exergy efficiency. R1233zd emerges as the preferred alternative from a safety perspective, exhibiting comparable performance with minimal penalties in both power generation and efficiency metrics. System-level analysis shows that properly sized ORC–hydrogen integration reduces Hospital 1 user LCOEtot from 0.23 $/kWh to 0.069 $/kWh—a 70% reduction achieved by minimizing grid dependence. Environmental benefits strongly correlate with grid carbon intensity, with operational CO2 emission reductions ranging from 181 tons annually in Spain to 752 tons in Poland. Full article
(This article belongs to the Special Issue Numerical Study of Waste and Exhaust Heat Recovery)
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Review

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45 pages, 9477 KB  
Review
Decarbonization Pathways in Underground Mining in Cold and Arctic Climates: A Review of Heat Recovery Systems with Case Studies in Canada
by Hosein Kalantari and Seyed Ali Ghoreishi-Madiseh
Energies 2026, 19(1), 22; https://doi.org/10.3390/en19010022 - 19 Dec 2025
Viewed by 984
Abstract
In cold climates, mine air conditioning systems are essential for preventing liners and shaft components from freezing. Traditionally, fossil fuel burners are used to heat intake air, resulting in high energy consumption and significant greenhouse gas emissions. As part of efforts to reduce [...] Read more.
In cold climates, mine air conditioning systems are essential for preventing liners and shaft components from freezing. Traditionally, fossil fuel burners are used to heat intake air, resulting in high energy consumption and significant greenhouse gas emissions. As part of efforts to reduce both environmental impacts and energy use, mining companies are increasingly adopting innovative solutions, such as heat recovery systems. These systems offer a promising approach to significantly reduce energy demand for underground mine heating. This study evaluates several heat recovery technologies including exhaust air, water, hybrid exhaust air–water, diesel exhaust, jacket water, and hybrid diesel exhaust–jacket-water systems, through numerical modeling. Two case studies are presented: a grid-connected mine in British Columbia with moderately cold conditions, and an off-grid mine in the Northwest Territories, which experiences Arctic climate extremes. Results show that heat recovery can reduce heating costs by up to 89% in British Columbia and as much as 90% in the Northwest Territories, depending on the system applied. The findings also demonstrate substantial associated carbon emission reductions. Furthermore, a comprehensive feasibility analysis was carried out to evaluate the thermodynamic performance, financial savings, and carbon emission reductions of these systems across various mining operations, offering a preliminary assessment of their potential for mining settings. Full article
(This article belongs to the Special Issue Numerical Study of Waste and Exhaust Heat Recovery)
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