Conveners
Sustainable Energy Engineering and Applications: ER I
- Ivan Simeonov (Vasil Levsky National Military University)
- Nikolay Padarev (Vasil Levsky National Military University)
Description
Remote Microsoft Teams link for session:
https://teams.microsoft.com/meet/376532165035473?p=9xBJW1k58qFFwidM2b
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Mr Aadu Petrov (BC student)25/06/2026, 12:05Sustainable Energy Engineering and ApplicationsPaper – Oral Presentation
The widespread adoption of disposable electronic cigarettes has created a rapidly growing waste stream containing embedded lithium-ion batteries. In most cases, these batteries are discarded together with the device once the e-liquid reservoir is depleted, despite the possibility that the electrochemical lifetime of the cell significantly exceeds the functional lifetime of the product. This...
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Ventsislava Nikolova-Minkova (Technical University of Gabrovo)25/06/2026, 12:20Sustainable Energy Engineering and ApplicationsPaper – Poster Presentation
The importance of renewable energy has grown enormously in recent years, with the EU's target for renewables to achieve a share of 42.5% of gross energy consumption by 2030. This is related not only to stimulating technological developments in the field and increasing investments, but also to legislative changes to accelerate the modernization of networks, remove regulatory barriers and...
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Olga Borisova (Varna Free University "Chernorizets Hrabar")25/06/2026, 12:35Sustainable Energy Engineering and ApplicationsPaper – Oral Presentation
This report analyzes the fundamental regulatory transformation of the Bulgarian energy sector, stemming from the transition from the traditional centralized model to a decentralized legal framework for renewable energy sources. The primary research focus is directed toward the conceptual alignment and existing contradictions between the Energy Act and the Energy from Renewable Sources Act....
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Atanasi Tashev (Department of Transport and Aircraft Equipment and Technologies, Faculty of Mechanical Engineering, Technical University of Sofia, Plovdiv Branch, 25 Tsanko Dyustabanov Street, 4000 Plovdiv , Bulgaria)25/06/2026, 12:50Sustainable Energy Engineering and ApplicationsPaper – Oral Presentation
This study presents a comparative experimental analysis of the thermodynamic and economic performance of a compression ignition engine operating in conventional diesel mode and in dual-fuel mode with compressed natural gas and hydrogen. The investigation evaluates the influence of gaseous fuel addition on fuel consumption, brake specific fuel consumption, thermal efficiency, and cost of energy...
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Iliyan Hutov (defence technologies), Petia Gencheva (Bulgaria)25/06/2026, 13:05Sustainable Energy Engineering and ApplicationsPaper – Oral Presentation
Secure and resilient operation is a critical requirement for modular Power-to-Liquid e-fuel plants supplied by intermittent renewable energy. This paper investigates a modular e-fuel production architecture powered by a hybrid photovoltaic-wind-battery system and evaluates its response to short-duration renewable disturbances. A deterministic operational model is formulated for renewable...
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Prof. Olga Borisova (Varna Free University "Chernorizets Hrabar")25/06/2026, 13:20Sustainable Energy Engineering and ApplicationsPaper – Oral Presentation
This study analyzes the critical interaction between centralized nuclear power capacities and emerging decentralized energy communities within the context of the full liberalization of the Bulgarian energy market by 2026. The primary focus is directed toward the regulatory dichotomy between the Energy Act (EA), which ensures systemic security through base-load capacities, and the Energy from...
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