Advances in High-Efficiency Energy Conversion Systems

Dear Colleagues,

Energy conversion is the exchange of one kind of energy for another. According to the principle of conservation of energy, the total energy of an isolated system remains constant. Individual energy components included in the total energy can change their value, but the system itself always retains the same amount of energy. In energy and power equipment, there are usually several stages of energy conversion. All energy processes use energy conversion, usually multistage, to produce the required form of usable energy (usually electrical, thermal, kinetic, potential, mechanical and other). Energy conversion should be as efficient as possible (for ecological, economic and social reasons).

This Special Issue aims to introduce and present energy conversion systems with high efficiency and the issues related to the use and operation of these systems.

Potential submission subjects include, among others, such topics as:

• new or improved methods of increasing the efficiency or flexibility of energy generation;
• the use of waste heat, low-temperature heat and other forms of dissipated energy, including the use of noise and vibration energy;
• optimization of energy production and use through modern control and monitoring systems—energy management systems;
• the use of new forms or methods of energy conversion (e.g. energy harvesting);
• increase of the use of energy efficient drives to reduce the energy intensity of industry;
• gasification of solid fuels to maximize energy efficiency combined with the elimination or reduction of methane (CH₄) and carbon dioxide (CO₂) emissions;
• the combination of natural biodegradation with biogas recovery;
• substitution of technologies for the use of natural gas as a fossil fuel in favour of agricultural and landfill biogas from sewage treatment plants, pyrolytic gas and from coal and lignite gasification;
• biomass thermal processing based on the capture of chemical carbon in the form of charcoal or biochar, combined with the production of energy based on volatile parts without the use or minimized use of elemental carbon (BECCS—energy with a negative CO₂ balance);
• new technologies for electricity generation (including in combination) using fuel cells (for mobile or stationary applications);
• the construction of new hybrid systems using fuel cells;
• new or improved fuel cells;
• use of energy storage systems in distributed hybrid systems (including, among others, batteries, kinetic storage systems such as flywheels, batteries with internal storage, pumped-storage hydroelectric power plants);
• the use of excess energy for the production of carriers enabling the storage of alternative fuels (including, among others, hydrogen and synthetic methane);
• new or improved energy storage technologies.

Prof. Dr. Zbigniew Matuszak
Prof. Dr. Cezary Behrendt
Prof. Dr. Marek Jaśkiewicz
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. 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.

• energy conversion
• energy storage
• biomass processing
• fuel cells
• energy-saving drives
• energy harvesting