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Research Studies on Combined Heat and Power Systems

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: 30 September 2026 | Viewed by 1195

Special Issue Editors


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Guest Editor
Faculty of Electrical Engineering and Computer Science, Stefan cel Mare University of Suceava, 720229 Suceava, Romania
Interests: cogeneration; renewable energy sources; buildings energy efficiency; energy market; high efficiency cogeneration; support schemes; energy audits; thermal and electrical power generation
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Guest Editor
Faculty of Power Engineering, National University of Science and Technology Politehnica Bucharest, 060042 Bucharest, Romania
Interests: cogeneration; energy efficiency; biogas; energy audits; district heating

Special Issue Information

Dear Colleagues,

The study of combined heat and power (CHP) systems is at a stage of increased interest in the international scientific community, due to the multiple challenges and objectives that these technologies can offer in the current energy context. Cogeneration systems confer benefits not only from a technical perspective but also from an economic and social point of view: reducing energy costs, increasing local energy security and stimulating sustainable development. These aspects justify the interest of researchers in identifying technical–economic optimization models and solutions adapted to various regional contexts. Cogeneration based on biomass, biogas or other renewable resources is becoming a very topical topic, as it ensures both the energy recovery of organic waste and the reduction in dependence on fossil fuels. Research in this field can provide solutions for increasing the stability of systems and their integration into decentralized energy infrastructures. Therefore, the scientific papers of this Special Issue will be able to contribute to the substantiation of public policies and the orientation of investments in energy infrastructure.

This Special Issue aims to present and disseminate original research or review articles on the important topic of cogeneration systems.  The call for papers seeks to collect several empirical, theoretical—or case studies—and innovative technical developments, with practical implications on the design, installation and operation of cogeneration systems. The fields of application can range from residential to industrial sectors.

Topics of interest for publication (research articles, reviews articles) include, but are not limited to:

  • CHP technologies;
  • Energy efficiency and technological optimization;
  • Cogeneration based on renewable and circular resources;
  • Applications of cogeneration systems;
  • Modeling, simulating, monitoring, optimization case studies;
  • Development of micro-CHP and decentralized solutions;
  • Integrating cogeneration into smart-grid structures;
  • Economic dispatch of multiple energy carriers;
  • District heating and cooling systems;
  • Cogeneration and trigeneration systems in buildings;
  • Reliability and availability of cogeneration systems;
  • Economic and energy policy aspects;
  • Environmental and sustainability aspects;
  • Indicators for assessing the performance of cogeneration systems;
  • Integration of energy storage systems for improved efficiency and flexibility of CHP plants.

Dr. Pavel Atanasoae
Dr. Ioan Bitir-Istrate
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 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-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

  • cogeneration
  • combined heat and power
  • trigeneration
  • primary energy savings
  • high efficiency cogeneration
  • energy efficiency
  • decarbonization
  • circular economy
  • energy sustainability
  • integration of renewable sources
  • energy flexibility
  • biogas

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Published Papers (1 paper)

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Research

13 pages, 2106 KB  
Article
Comparative Thermodynamic and Environmental Performance of the Solar Titan 130 Gas Turbine Operating on Natural Gas and a Hydrogen-Enriched (20%) Fuel Blend
by Roxana-Margareta Grigore, Cornelia Capat, Ioan-Viorel Banu and Sorin-Gabriel Vernica
Energies 2026, 19(6), 1403; https://doi.org/10.3390/en19061403 - 11 Mar 2026
Viewed by 759
Abstract
The integration of hydrogen into natural-gas-fired gas turbines represents a promising transitional pathway for reducing greenhouse gas emissions in industrial power generation. This study presents a comparative thermodynamic and environmental assessment of a Solar Titan 130 gas turbine operating in combined heat and [...] Read more.
The integration of hydrogen into natural-gas-fired gas turbines represents a promising transitional pathway for reducing greenhouse gas emissions in industrial power generation. This study presents a comparative thermodynamic and environmental assessment of a Solar Titan 130 gas turbine operating in combined heat and power (CHP) mode under two fueling conditions: conventional natural gas and a hydrogen-enriched CH4/H2 (80/20 vol.%) blend. The analysis combines validated operational data for natural gas with analytical thermodynamic modeling for the blended-fuel scenario to evaluate key performance indicators, including thermal efficiency, specific fuel consumption, power output, and carbon dioxide emissions. The results indicate that hydrogen enrichment leads to an increase in thermal efficiency from 34.1% to 36.6% and a reduction in specific CO2 emissions by approximately 13.7%, while maintaining similar thermal input within the adopted steady-state modeling framework. Compressor power consumption decreases, and net electrical output increases slightly under hydrogen-enriched operation, contributing to improved overall energy performance. Although the hydrogen-blended regime is assessed through modeling, the findings suggest that moderate hydrogen addition can enhance efficiency and environmental performance in industrial gas turbines without fundamental structural redesign of the turbine core, assuming appropriate fuel supply and control system adaptation. The study provides practical insights into the feasibility of hydrogen-assisted operation in existing CHP installations and supports its role in near-term decarbonization strategies. Full article
(This article belongs to the Special Issue Research Studies on Combined Heat and Power Systems)
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