InnoEE-2025 will begin in a few days, and the draft programme is now available! The official programme will be announced soon. Sign up to the conference newsletter for timely updates....
InnoEE Conference
Innovations in Energy and the Environment (InnoEE) 2025 Conference
12-13 May 2025 Technical University of Sofia
About the event
InnoEE initiates the Days of Science activities of the Technical University of Sofia for 2025. The conference gathers a diverse group of Bulgarian and international professionals from academia, industry, and government, to share and discuss recent innovations, advancements and developments in the fields of energy engineering, thermofluids engineering, building services engineering, refrigeration engineering, along with other areas of engineering and science, pertinent to the theme of this year's edition: Pathways to sustainable, healthy and resilient energy systems.
The goal of InnoEE-2025 is to provide a forum for exchanging novel ideas, fostering new partnerships, and identifying opportunities for interdisciplinary and cross-sectoral collaborations towards the development of such pathways. The proceedings of InnoEE-2025 will be published with open access, and will be indexed in major scientific databases. Don't miss the opportunity to get involved, and book your ticket today!
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Endorsed by
Programme
InnoEE-2025 will begin in a few days, and the draft programme is now available! The official programme will be announced soon. Sign up to the conference newsletter for timely updates.
schedule at a glance
| MONDAY 12th May 2025 |
||
| 09:00 | Registration | |
| 09:30 | ||
| 10:00 | Opening ceremony | |
| 10:30 | Plenary session 1 | |
| 11:00 | ||
| 11:30 | Coffee break | |
| 12:00 | Technical session 1 | |
| 12:30 | ||
| 13:00 | Networking lunch | |
| 13:30 | ||
| 14:00 | Plenary session 2 | |
| 14:30 | ||
| 15:00 | Coffee break | |
| 15:30 | Technical session 2 | |
| 16:00 | ||
| 16:30 | Coffee break | |
| 17:00 | Technical session 3 | |
| 17:30 | ||
| 18:00 | Exhibition opening | |
| 18:30 | ||
| 19:00 | ||
| 19:30 | ||
| 20:00 | Dinner
reception (Sofia city center) |
|
| 20:30 | ||
| 21:00 | ||
| 21:30 | ||
| 22:00 | ||
| 22:30 | ||
| TUESDAY 13th May 2025 |
|||
| Registration | 09:00 | ||
| 09:30 | |||
| Technical session 4 | 10:00 | ||
| Workshop 1 | 10:30 | ||
| 11:00 | |||
| Coffee break | 11:30 | ||
| Technical session 5 | Workshop 2 | 12:00 | |
| 12:30 | |||
| Networking lunch | 13:00 | ||
| 13:30 | |||
| Technical session 6 | Workshop 3 | 14:00 | |
| 14:30 | |||
| Coffee break | 15:00 | ||
| Technical session 7 | Technical session 8 | 15:30 | |
| 16:00 | |||
| Coffee break | 16:30 | ||
| Technical session 9 | Technical session 10 | 17:00 | |
| 17:30 | |||
| 18:00 | |||
| Farewell cocktail | 18:30 | ||
| 19:00 | |||
| 19:30 | |||
| 20:00 | |||
| 20:30 | |||
| 21:00 | |||
| 21:30 | |||
| 22:00 | |||
| 22:30 | |||
TECHNICAL Programme
Note: The name indicated below each presentation is the name of the presenter. The names of all authors are available in the downloadable official programme.
Plenary Session 1Monday, May 12th 10:30—11:30 | Room 701
Pathways to Sustainable, Healthy and Resilient HVAC and Refrigeration Systems
Monday, May 12th 10:30—11:30 | Room 701
Pathways to Sustainable, Healthy and Resilient HVAC and Refrigeration Systems
Chair
Martin Ivanov
Vice-Dean of FPEPM, Technical University of Sofia
Sustainable refrigeration as an opportunity for society and climate
Yosr Allouche
International Institute of Refrigeration (IIR) — FRANCE
Dr. Eng. Yosr Allouche is the General Director of the International Institute of Refrigeration (IIR), having assumed the role in October 2024. She holds a PhD in Mechanical Engineering and is recognised for her expertise in the energy performance of CO2 transcritical systems in hot climates and PCM (Phase Change Material) energy storage. Dr. Allouche gained recognition as a research scientist in refrigeration technology at the Norwegian University of Science and Technology (NTNU), where she has also served as a visiting Associate Professor in Refrigeration since 2021. She has authored numerous publications in scientific journals, guides, and policy documents.
Advanced ventilation of spaces: Focus on occupants, energy efficiency and resilience
Arsen Melikov
Technical University of Denmark
Arsen Melikov, Fellow ASHRAE, Fellow ISIAQ, is a professor at the International Centre for Indoor Environment and Energy at DTU. His teaching and research areas cover advanced air distribution in rooms and vehicle compartments, airborne cross-infection, impact of indoor environment on people’s health, comfort and performance, personally controlled environment, heat and mass transfer, indoor climate measurements and instruments. He has been principle investigator of 60 research projects sponsored by government and private organizations in numerous countries. New HVAC technologies and measuring instruments have been developed based on his collaboration with industry. He has supervised 30 PhD students and more than 110 MSc students. Prof. Melikov is author and co-author of more than 400 scientific papers published in 15 languages. He has received numerous awards, including the Rydberg Gould Medal of The Scandinavian Federation of Heating, Ventilation and Sanitary Engineering Associations in Denmark, Finland, Iceland, Norway and Sweden.
Technical Session 1Monday, May 12th 12:00—13:00 | Room 701
Sponsor Tech Talks
Monday, May 12th 12:00—13:00 | Room 701
Sponsor Tech Talks
Chair
Martin Ivanov
Vice-Dean of FPEPM, Technical University of Sofia
CAIRO selection software: The most advanced free tool for sizing heat exchangers
Lyubomir Stoyanov
HEXONIC
Toyota multipath strategy
Ivaylo Blajev
Toyota Balkans
Honeywell Protonium: Green hydrogen design, control and optimization
Daniel Nikolov
Honeywell
Cairox Bulgaria: Company presentation
Vladimir Raykov
Cairox Bulgaria
Plenary Session 2Monday, May 12th 14:00—15:00 | Room 701
Is Hydrogen a Viable Solution for Decarbonisation of the Energy Infrastructure?
Monday, May 12th 14:00—15:00 | Room 701
Is Hydrogen a Viable Solution for Decarbonisation of the Energy Infrastructure?
Chair
Martin Ivanov
Vice-Dean of FPEPM, Technical University of Sofia
Numerical assessment of the Rough reservoir development as an UK intra-seasonal hydrogen storage facility
Zuansi Cai
Edinburgh Napier University — UNITED KINGDOM
Dr. Zuansi Cai is an Associate Professor of Energy and Environmental Engineering and a member of the UK EPSRC Peer Review College in energy storage. He is a recipient of The Royal Academy of Engineering Industrial Fellowship 2021/22. Zuansi has a track record of research excellence, including funding, publication and impact. He had published 50+ high impact journal paper (H-index=20, >1300 citations since 2019) in energy storage, renewable energy, etc. Recently, he has developed a novel numerical simulator with parallel computing capability. The simulator (GPSFLOW) is capable of simulating heat transfer, multi-phase and multi-component flow in pore media. The simulator has been recently used by Centrica to assess the performance of the Rough gas reservoir as hydrogen and gas mixture storage facility for zero emission energy transition.
Hydrogen as a vector for the transition to a clean energy and transport sector
Magdalena Dudek
AGH University of Krakow — POLAND
Magdalena Dudek is a professor in the Department of Sustainable Energy Development at AGH University of Krakow. She is engaged in teaching and research in the interdisciplinary fields of energy efficiency, integrated power sources involving renewable energy, hydrogen technologies, fuel cells and electrochemical devices. Prof. Dudek is the author or co-author of over 100 scientific and technical papers. She is included in the top 2% of research scientists on the Elsevier and Stanford University lists. She also holds ten patents in the area of hydrogen and fuel cells. With more than 20 years of experience in the energy and fuels market, particularly in the hydrogen economy and fuel cell technology, Prof. Dudek’s contributions to industrial cooperation have been recognised with special awards at international and Polish exhibitions. Additionally, she has been involved in research programmes funded by the European Union, the European Institute of Technology, UNESCO and national research frameworks in Poland.
Technical Session 2Monday, May 12th 15:30—16:30 | Room 701
Earth, Energy and Environmental Protection — Part I
Monday, May 12th 15:30—16:30 | Room 701
Earth, Energy and Environmental Protection — Part I
Chair
Borislav Stankov
Technical University of Sofia
Self-consumption and self-sufficiency in energy sharing communities in Germany: What is the impact of wind energy?
Jan Wiesenthal
Leuphana University of Lüneburg — GERMANY
Environmental effects of ICT-enabled small-scale energy flexibilities: The perspective of German market players
Hannes Bluhm
Europa-Universität Flensburg — GERMANY
Improved degradation of Rhodamine B using La/ZnO trybocatalysts: Optimization of annealing conditions for wastewater treatment
Dobrina Ivanova
University of Sofia
Allocating small-scale production capacities for a balanced and resilient renewable energy mix in a local energy community
Borislav Stankov
Technical University of Sofia
Green transition in „Orlandovtsi“: A pre-research of the district heating system through CHP, renewable sources, smart grids, and ISO 50001
Angel Penev
Technical Session 3Monday, May 12th 17:00—18:00 | Room 701
Fluid Mechanics, Thermodynamics and Heat Transfer in Energy and Environmental Applications
Monday, May 12th 17:00—18:00 | Room 701
Fluid Mechanics, Thermodynamics and Heat Transfer in Energy and Environmental Applications
Chair
Iskra Simova
Technical University of Sofia
Numerical analysis of mixed convection from two heated cylinders in a square cavity
Momchil Vassilev
Technical University of Sofia
Analytical study of crown fire in Bulgarian forest
Iskra Simova
Technical University of Sofia
Hydrokinetic energy utilization from rivers: Prospects and challenges in Bulgaria
Iskra Simova
Technical University of Sofia
Model reference adaptive control of axial piston pump
Alexander Mitov
Technical University of Sofia
CFD-based analysis of wood pellet combustion in a domestic boiler (small-scale)
Kalin Krumov
University of Chemical Technology and Metallurgy
Technical Session 4Tuesday, May 13th 10:00—11:30 | Room 701
Textiles and Clothing in Ecological and Environmental Applications — Part I
Tuesday, May 13th 10:00—11:30 | Room 701
Textiles and Clothing in Ecological and Environmental Applications — Part I
Chair
Sanja Ercegović Ražić
University of Zagreb — CROATIA
Environmental protection in the context of the textile and fashion industry
Sanja Ercegović Ražić
University of Zagreb — CROATIA
Design and production of a mini-collection of fashion accessories inspired by the architectural elements of the Dancing House, using 3D printing and bonding techniques
Suzana Kutnjak-Mravlinčić
University of Zagreb — CROATIA
Sustainability in digital knitwear design: Exploring software solutions in the industry
Daniela Sofronova
Technical University of Sofia
Innovative design and development of sustainable luxury clothing inspired by national traditions using CAD technologies
Margaret Sivova
Technical University of Sofia
Sustainable clothing design for a folklore festival in kindergarten
Tanya Peneva
Technical University of Sofia
Workshop 1Tuesday, May 13th 10:30—11:30 | Room 707
Tips and Tricks in Sizing Heat Exchangers
Tuesday, May 13th 10:30—11:30 | Room 707
Tips and Tricks in Sizing Heat Exchangers
Lyubomir Stoyanov
HEXONIC
Questions Addressed in the Workshop
- What factors should be considered when sizing a heat exchanger?
- How to choose the best solution depending on the application?
- Which is the right type of heat exchanger and what do we need to know?
Technical Session 5Tuesday, May 13th 12:00—13:00 | Room 701
Textiles and Clothing in Ecological and Environmental Applications — Part II
Tuesday, May 13th 12:00—13:00 | Room 701
Textiles and Clothing in Ecological and Environmental Applications — Part II
Chair
Daniela Sofronova
Technical University of Sofia
Investigation of the fit and protective performance of surgical face masks
Maria Ivanova
Technical University of Sofia
Sustainable design to sustainable behaviour
Yoana Pavlova
Technical University of Sofia
Optimization of gin saws for sustainable and environmentally friendly cotton processing in textile applications
Khasanboy Yuldashev
Namangan Institute of Textile Industry — UZBEKISTAN
Theoretical study of the point impact of a fibrous mass on a shaped grooved surface for environmentally efficient textile processing
Maftuna Inoyatova
Namangan Institute of Textile Industry — UZBEKISTAN
Workshop 2Tuesday, May 13th 12:00—13:00 | Room 707
Applications of Exhaust Air Heat Pumps in Nearly and Net-Zero Energy Buildings
Tuesday, May 13th 12:00—13:00 | Room 707
Applications of Exhaust Air Heat Pumps in Nearly and Net-Zero Energy Buildings
Ivan Dimchev
Technical University of Sofia
Workshop Overview
The purpose of the workshop is to present the applications of exhaust air heat pumps (EAHPs) in the context of nearly zero-energy buildings (nZEB) and net-zero energy buildings (ZEB). The workshop focuses on the integration of EAHPs into HVAC systems, emphasizing their role in achieving high energy efficiency. Particular attention will be given to the alignment of EAHP performance with national regulations derived from the EU’s Energy Performance of Buildings Directive. Practical considerations for design, system selection, and adaptation to local climate conditions will be discussed, along with relevant case studies and system performance parameters.
Technical Session 6Tuesday, May 13th 14:00—15:00 | Room 701
Nuclear Technologies and Thermal Equipment in Energy and Environmental Applications
Tuesday, May 13th 14:00—15:00 | Room 701
Nuclear Technologies and Thermal Equipment in Energy and Environmental Applications
Chair
Mladen Mitev
Technical University of Sofia
Discussion of primary to secondary circuits leakages taking into account some deviations from EOPs
Petya Vryashkova
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
Comparison of an integral and a stand-alone calculations of hypothetical severe accident in a generic LW SMR with ASTEC code
Petya Vryashkova
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences
Options for coal-to-nuclear conversion with a small modular PWR
Petar Petrov
Technical University of Sofia
Mechanical performance evaluation of Zircaloy-4, FeCrAl, and SiC composite nuclear fuel claddings under normal operation using finite element modeling
Rositsa Palakarcheva-Ivanova
Technical University of Sofia
Workshop 3Tuesday, May 13th 14:00—15:00 | Room 707
Engineering for Social Changes
Tuesday, May 13th 14:00—15:00 | Room 707
Engineering for Social Changes
Yoana Pavlova
Technical University of Sofia
Workshop Overview
The aim of the workshop is to provoke engineers to understand the importance of their work in solving social and environmental problems. Participants will have the opportunity to reframe their knowledge into a social perspective through games, discussions and group activities. They will also learn about the ethical considerations of their engineering practices, how to apply sustainable design, and how to approach social problems through technological innovation.
Objectives of the Workshop
- Raise awareness: Help engineers understand the social and environmental consequences of their work.
- Promote ethical engineering: Highlight the importance of responsible, sustainable, and inclusive engineering practices.
- Empower action: Equip engineers with tools and ideas to integrate social impact considerations into their work, both personally and professionally.
Technical Session 7Tuesday, May 13th 15:30—16:30 | Room 701
HVAC and Refrigeration Systems, Indoor Environmental Quality, and Energy Performance of Buildings
Tuesday, May 13th 15:30—16:30 | Room 701
HVAC and Refrigeration Systems, Indoor Environmental Quality, and Energy Performance of Buildings
Chair
Kostadin Fikiin
Technical University of Sofia
Accounting for passive solar gains at energy certification of buildings
Penka Panova
University of Chemical Technology and Metallurgy
Exergy analysis of building HVAC system
Georgi Georgiev
Technical University of Varna
Increasing the efficiency of exhaust air heat pumps in cooling mode: A technical review
Ivan Dimchev
Technical University of Sofia
A study of the performance of water-to-water heat pump connected to the return line of district heating system
Ivan Dimchev
Technical University of Sofia
Ventilation system design for metal preparation workshop within a hot-dip galvanizing facility
Ana Borissova
Technical University of Sofia
Technical Session 8Tuesday, May 13th 15:30—16:30 | Room 707
Textiles and Clothing in Ecological and Environmental Applications — Part III
Tuesday, May 13th 15:30—16:30 | Room 707
Textiles and Clothing in Ecological and Environmental Applications — Part III
Chair
Daniela Sofronova
Technical University of Sofia
Environmental implications of fine trash in cotton fibers and its impact on cotton cleaning efficiency
Khasanboy Yuldashev
Namangan Institute of Textile Industry — UZBEKISTAN
Innovative leather composites in construction: Environmental performance of modified silk hydrolysate fillers
Abbosbek Muxtorov
Namangan Institute of Textile Industry — UZBEKISTAN
Cotton fabric properties and weave types for sustainable textile applications
Iroda Nabiyeva
Tashkent Institute of Textile and Light Industry — UZBEKISTAN
Environmental efficiencies and environmental impacts of cotton pneumatic systems
Muhammadodil Mutalov
Namangan Institute of Textile Industry — UZBEKISTAN
Technical Session 9Tuesday, May 13th 17:00—18:30 | Room 701
Renewable Energy Technologies
Tuesday, May 13th 17:00—18:30 | Room 701
Renewable Energy Technologies
Chair
Detelin Markov
Technical University of Sofia
Analysing the performance of distribution power system with photovoltaic integration and static var compensation
Klajdi Kamberi
Polytechnic University of Tirana — ALBANIA
Assessing the integration of a 60 MW wind farm into the Albanian power system
Ledio Luku
Polytechnic University of Tirana — ALBANIA
Investigation of a horizontal-axis wind turbine at low wind speeds
Rossen Iliev
Technical University of Sofia
Wind energy contribution on grid stability of Balkan peninsula
Adi Vokshi
Technical University of Sofia
Regarding the utilization of the ground-based wind energy potential in the Dobrich region of Bulgaria
Detelin Markov
Technical University of Sofia
Evaluating the methanogenic potential of fresh and dry stinging nettle (Urtica dioica) as a co-substrate in anaerobic digestion: Experimental insights and kinetic modelling
Bozhidar Stefanov
Technical University of Sofia
Technical Session 10Tuesday, May 13th 17:00—18:30 | Room 707
Earth, Energy and Environmental Protection — Part II
Tuesday, May 13th 17:00—18:30 | Room 707
Earth, Energy and Environmental Protection — Part II
Chair
George Pichurov
Technical University of Sofia
Principal component analysis of the environmental impact of ships visiting the port of Varna
Ivet Fuchedzhieva
Technical University of Varna
Modernization of floating dock to increase lifting capacity
Yordan Denev
Technical University of Varna
Development of composites based on thermosetting polymers with cenospheres fillers
Boyan Dochev
Technical University of Sofia
Integrating virtual engineering for energy-efficient manufacturing in harsh industrial conditions
Mario Semkov
Technical University of Sofia
Environmentally sustainable machining of complex parts using 3D scanning and virtual models
Todor Gavrilov
Technical University of Sofia
Design and construction of a mass flow meter for liquid fuels with electronic control
Atanasi Tashev
Technical University of Sofia
Particulate size distribution and carbon conversion during oxidation of biomass from livestock farming
Iliyana Naydenova
Technical University of Sofia
Exhibition opening
VsReality: An exhibition versus reality
Monday, May 12th 18:00—18:30
As the first conference day comes to a close, join artist Desislava Latinova to learn more about the beautiful collection of sculptures exhibited at the venue exclusively for InnoEE-2025.
Newsletter
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Past Newsletters
- 11 May 2025 Official Programme and Venue Update
- 2 April 2025 Extended Paper Submission Deadline
- 28 March 2025 Plenary Talks – Part I
- 1 February 2025 Call for Papers
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