Latest Advances in Renewable Energy Technologies

A special issue of Clean Technologies (ISSN 2571-8797).

Deadline for manuscript submissions: 30 September 2025 | Viewed by 524

Special Issue Editor


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Guest Editor
College of Energy and Electronics, Technical University of Sofia, 8 Kl. Ohridsky Blvd., 1000 Sofia, Bulgaria
Interests: gas adsorption; fly ash zeolites; surface of materials; carbon capture; radioactive waste remediation

Special Issue Information

Dear Colleagues,

Sustainable development is currently often used as a label in various activities. Society must embrace it as a philosophy and a way of life to ensure a negative legacy is not left for future generations. Energy production is one of the key challenges facing the achievement of sustainability due to the ongoing increase in demand. In this context, the advanced development of renewable energy sources must be considered a crucial factor.

The scientific community has to also extend its research activities both to known renewable sources like solar, wind, and water and to the possibility of converting the conventional energy sector to the renewable one.

Dr. Denitza Zgureva
Guest Editor

Manuscript Submission Information

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Keywords

  • clean energy technologies
  • waste to energy
  • energy waste management
  • renewable energy sources
  • accumulation of energy
  • modelling of RES grid
  • energy security

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Published Papers (1 paper)

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Research

15 pages, 1916 KiB  
Article
Member Size Effect in Seebeck Coefficient of Cement Composites Incorporating Silicon Carbide
by Byeong-Hun Woo, Kyu-Tae Park, Kyung-Suk Yoo and Jee-Sang Kim
Clean Technol. 2025, 7(2), 33; https://doi.org/10.3390/cleantechnol7020033 - 11 Apr 2025
Viewed by 289
Abstract
This study investigates the size effect on the Seebeck coefficient (SC) in cement composites incorporating silicon carbide (SiC). Two specimen shapes, cubic (50 × 50 × 50 mm3) and beam (40 × 40 × 160 mm3), were analyzed with [...] Read more.
This study investigates the size effect on the Seebeck coefficient (SC) in cement composites incorporating silicon carbide (SiC). Two specimen shapes, cubic (50 × 50 × 50 mm3) and beam (40 × 40 × 160 mm3), were analyzed with varying SiC substitution ratios (0%, 50%, and 100%) for fine aggregates. Thermal and electrical conductivities were measured to assess their influence on the SC. The results showed that a higher SiC content increased porosity, which reduced mechanical strength but significantly improved thermal and electrical conductivities. Thermal conductivity increased from 1.88 W/mK (0% substitution) to 11.89 W/mK (100% substitution), while electrical conductivity showed an improvement from 0.0056 S/m to 0.065 S/m. Cubic specimens exhibited higher SC values compared to beam specimens, with a maximum SC of 1374 μV/K at 100% SiC substitution, attributed to shorter thermal diffusion distances. The findings suggest that optimizing member size and SiC content can significantly improve the thermoelectric performance of cement composites, potentially enhancing energy efficiency in construction applications. Full article
(This article belongs to the Special Issue Latest Advances in Renewable Energy Technologies)
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