Conference Papers
Publications in peer reviewed Conference Proceedings
Kitsopoulou, E. Bellos, D. Gonidaki, C. Sammoutos, P. Lykas, E. Vidalis, K. Polychronakis, G. Mitsopoulos, C. Tzivanidis, Multi-objective Evaluation of Cooling Passive Building Envelope Technologies for Optimal Thermal Performance and Indoor Comfort, In Proceedings of “International Conference ENERGY in BUILDINGS 2025”, 15 November 2025, Athens, Greece
Kitsopoulou, D.Pallantzas, G. Kosmadakis, C. Sammoutos, P. Lykas, E. Vidalis, D. Gonidaki, E. Bellos, C. Tzivanidis, Energy and thermal comfort investigation of a passive house building using field monitoring data, In Proceedings of “The 38thInternational Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems”, Paper ID: 7250, 29 June – 4 July, 2025, Paris, France
Kitsopoulou, E. Bellos, C. Sammoutos, P. Lykas, D. Gonidaki, E. Vidalis, G. Mitsopoulos, C. Tzivanidis, Development of a simplified comfort evaluation tool for multi-objective evaluation analysis of building energy retrofit strategies, In Proceedings of “Alternative Energy Sources, Materials & Technologies – (AESMT’25)”, 13 – 14 May, 2025, Sofia, Bulgaria
Bellos, C. Sammoutos, P. Lykas, A. Kitsopoulou, A. Arabkoohsar, C. Tzivanidis, I. Alexopoulos. A mini‑review of industrial waste sources, efficiency enhancement techniques, and heat upgrade solutions with an emphasis on thermochemical processes. In Proceedings of “The 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2024)”, pp. 2066–2077, 30 June – 5 July, 2024, Rhodes, Greece.
Bellos, P. Lykas, A. Kitsopoulou, C. Sammoutos, I. Alexopoulos, A. Arabkoohsar, C. Tzivanidis. Thermodynamic analysis of a solar‑driven absorption heat transformer for industrial process heat. In Proceedings of “The 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2024)”, pp. 2078–2089, 30 June – 5 July, 2024, Rhodes, Greece.
Alexopoulos, C. Tzivanidis, V. Papaefthimiou, P. Lykas. Thermochemical energy storage using CaCO₃/CaO simulation of the charging and discharging process. In Proceedings of “The 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2024)”, pp. 2185–2194, 30 June – 5 July, 2024, Rhodes, Greece.
Kitsopoulou, E. Bellos, P. Lykas, C. Sammoutos, M. Gr. Vrachopoulos, C. Tzivanidis, Συστηματική ανάλυση ενσωμάτωσης υλικών PCM και οπτικά προηγμένων επιστρώσεων οροφής για ένα τυπικό κτίριο στην Αθήνα / (A systematic analysis of PCM and optically advanced roof coatings integration for Athenian climatic conditions), In Proceedings of “13th National Conference of soft energy sources”, 15-17 May 2024, Athens, Greece
Sammoutos, P. Lykas, A. Kitsopoulou, E. Bellos, C. Tzivanidis, Μοντελοποίηση συγκεντρωτικού ηλιακού συστήματος με κεντρικό δέκτη σε συνδυασμό με κύκλο Brayton υπερκρίσιμου CO2 / (Dynamic modeling of a solar central receiver coupled to a supercritical brayton power cycle), In Proceedings of “13th National Conference of soft energy sources”, 15-17 May 2024, Athens, Greece
Lykas, A. Kitsopoulou, E. Bellos, C. Tzivanidis, Investigation of a solar-driven cogeneration unit for power and hydrogen production via Aspen plus software, In Proceedings of “International Journal of Polygeneration 2023”, 26-28 July 2023, Kuta, Bali, Indonesia
Lykas, A. Kitsopoulou, E. Bellos, C. Tzivanidis, Parametric investigation of a CO2-based polygeneration system driven by renewable energy sources, In Proceedings of “International Journal of Polygeneration 2023”, 26-28 July 2023, Kuta, Bali, Indonesia
Pavlovic, E. Bellos, M. Grozdanovic, V. Stefanovic, M. Vukic, M. Lakovic-Paunovic, C. Tzivanidis, Dynamic analysis of a solar dish concentrating collector coupled to an organic Rankine cycle with reheating, In Proceedings of “20thInternational Conference on Thermal Science and Engineering of Serbia”, 169-176, 18-21 October 2022, Niš, Serbia
Bellos, C. Tzivanidis, Polygeneration systems driven by renewable energy sources – A critical mini review for the units with organic Rankine cycles, In Proceedings of “6thInternational Conference on Polygeneration”, 351-359, 4-6 October 2021 Zaragoza, Spain
Bellos, C. Tzivanidis, Yearly dynamic investigation of a solar-trigeneration unit in Athens by using TRNSYS software, In Proceedings of “6thInternational Conference on Polygeneration”, 360-370, 4-6 October 2021 Zaragoza, Spain
Pavlovic, E. Bellos, V. Stefanovic, M. Ilic, M. Grozdanovic, C. Tzivanidis, The use flat plate collectors in a pumped thermal energy storage latent system, Ιn Proceedings of “15thInternational Conference on Accomplishments in Mechanical and Industrial Engineering – (DEMI 2021)”, 210-215, 28-29 May 2021, Banja Luka, Bosnia and Herzegovina
Pavlovic, V. Stefanovic, E. Bellos, C. Tzivanidis, Solar Thermal Collector Efficiency Map: A New Evaluation Tool, Ιn Proceedings of “The 5thInternational conference mechanical engineering in XXI century – (MASING)”, 43-46, 9-10 December 2020, Faculty of Mechanical Engineering in Nis, Serbia
Alexopoulos, C. Tzivanidis. Simulation of the operation of a heat tank with phase change materials (PCM). In Proceedings of “The 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2019)”, pp. 2483–2494, 23 – 28 June, 2019, Wrocław, Poland.
Pavlovic, E. Bellos, V. Stefanovic, M. Lakovic, B. Drobnjakovic, C. Tzivanidis, Energy and Exergy Design of a Solar Thermal System with Phase Change Materials, Ιn Proceedings of “19thConference on Thermal Science and Engineering of Serbia – (Simterm 2019)”, 269-278, 22–25 October 2019, Sokobanja, Serbia
A.C. Montenon, P. Tsekouras, C. Tzivanidis, M. Bibron, C. Papanicolas. Thermo‑optical modelling of the linear Fresnel collector at the Cyprus Institute. In AIP Conference Proceedings, p. 100004, 2019, Casablanca, Morocco.
Bellos, C. Tzivanidis, N. Nikolaou, G. Mitsopoulos, Yearly Performance of a Cogeneration System with Nanofluid-based Thermal Photovoltaic Coupled to a Heat Pump, In Proceedings of “EinB2018 – 7thInternational Conference ENERGY in BUILDINGS 2018”, 115-124, 3 November 2018, Athens, Greece
M.Th. Plytaria, C. Tzivanidis, E. Bellos, I. Alexopoulos, K.A. Antonopoulos, The impact of phase change materials in the heating and the cooling loads of a building, In Proceedings of “8th International Conference from Scientific Computing to Computational Engineering”, Vol. II, 386-395, 4-7 July 2018 Athens, Greece
Mitsopoulos, E. Syngounas, E. Bellos, C. Tzivanidis, S. Anagnostatos. Experimental and numerical evaluation of a supermarket refrigeration system. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
Mitsopoulos, E. Bellos, C. Tzivanidis, S. Anagnostatos, E. Papanikolaou. Multi‑criteria evaluation of a solar assisted heating system for various building envelopes. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
D.N. Korres, C. Tzivanidis, C. Lindos. Thermal investigation of a new flat plate collector with a coaxial flow tube. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
D.N. Korres, C. Tzivanidis. Simulation and optimization of an experimentally analyzed compound parabolic collector. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
Alexopoulos, T. Christos, M.Th. Plytaria. The impact of fins on the operation of a heat tank with phase change materials (PCM). In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
M.Th. Plytaria, C. Tzivanidis, I. Alexopoulos, E. Bellos, K.A. Antonopoulos, Application of Phase Change Materials on the underfloor heating system of a building in Athens using TRNSYS simulation software, In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems”, 17-22 June 2018, Guimaraes, Portugal
Pavlovic, E. Bellos, V. Stefanovic, C. Tzivanidis, Comparison of a conical and a spiral absorber for a solar dish collector, in Proceedings of “10thInternational Symposium on Exploitation of Renewable Energy Sourses and Efficiency”, 39-44, 5-7 April 2018, Subotica, Serbia
Bellos, C. Tzivanidis, G. Tsifis, Eνεργειακή, εξεργειακή και οικονομική αξιολόγηση ενός κλιμακοειδούς συστήματος (cascade) απορρόφησης-μηχανικής συμπίεσης με χρήση ηλιακής ενέργειας / (Energetic, Exergetic and financial evaluation of a cascade absorption-compression refrigeration system driven by solar energy), In Proceedings of “11thNational Conference of soft energy sources”, Vol. Β(2), 907-918, 14-16 March 2018, Thessaloniki, Greece
E. Bellos, C. Tzivanidis, Ετήσια ενεργειακή και εξεργειακή απόδοση θερμοφωτοβολταϊκού συλλέκτη με χρήση νανορευστού / (Energetic and exergetic evaluation of a hybrid PV operating with nanofluids in yearly basis), In Proceedings of “11th National Conference of soft energy sources”, Vol. Β(2), 1193-1203, 14-16 March 2018, Thessaloniki, Greece
Mitsopoulos, E. Bellos, C. Tzivanidis, The insulation thickness as a design parameter in Greek climate, In Proceedings of “EinB2017 – 6thInternational Conference ENERGY in BUILDINGS 2017”, 99-108, 12 October 2017, Athens, Greece
Bellos, C. Tzivanidis, Thermodynamic Investigation of an Innovative Solar Driven Trigeneration System Ideal for the Building Sector, In Proceedings of “EinB2017 – 6thInternational Conference ENERGY in BUILDINGS 2017”, 109-118, 12 October 2017, Athens, Greece
Plytaria, C. Tzivanidis, E. Bellos, K.A. Antonopoulos, Thermal analysis of a building in Athens with phase change materials in roof using simulation program TRNSYS 17, In Proceedings of “7thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. II, 509-518, 5-8 July 2017, Athens, Greece
Bellos, C. Tzivanidis, M. Plytaria, Analytical Expression for Thermal Efficiency Coefficients of Parabolic Τrough Collectors, In Proceedings of “7thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. I, 67-74, 5-8 July 2017 Athens, Greece
Pavlovic, E. Bellos, V. Stefanovic, C. Tzivanidis, Experimental and numerical investigation of a solar dish collector with spiral absorber, In Proceedings of “13thInternational Conference on Accomplishments in Mechanical and Industrial Engineering – (DEMI 2017)”, 217-225, 26-27 May 2017, Banja Luka, Bosnia and Herzegovina
Tzinnis, E. Bellos, C. Tzivanidis, Parametric Analysis of a Solar Cooling system Designed for Athens Climate, In Proceedings of “EinB2016 – 5thInternational Conference ENERGY in BUILDINGS 2016”, 119-130, 12 November 2016, Athens, Greece
Bellos, C. Tzivanidis, K.A. Antonopoulos, Solar assisted heat pump space heating systems in Athens – An energetic and financial analysis, In Proceedings of “EinB2016 – 5thInternational Conference ENERGY in BUILDINGS 2016”, 41-48, 12 November 2016, Athens, Greece
Alexopoulos, C. Tzivanidis, E. Bellos, G. Mitsopoulos, D. Korres, Thermal Behavior of a Building Simulation using COMSOL, In Proceedings of “7thInternational Conference from Scientific Computing to Computational Engineering”, Vol. II, 409-413, 6-9 July 2016, Athens, Greece
Mitsopoulos, E. Bellos, C. Tzivanidis, I. Alexopoulos, D. Korres, The Impact of Insulation Thickness in Various Greek Cities, In Proceedings of “7thInternational Conference from Scientific Computing to Computational Engineering”, Vol. II, 385-394, 6-9 July 2016, Athens, Greece
Bellos, C. Tzivanidis, G. Mitsopoulos, I. Alexopoulos, Energetic, Exergetic and Financial Evaluation of Concentrating and No-Concentrating Solar Collectors, In Proceedings of “7thInternational Conference from Scientific Computing to Computational Engineering”, Vol. I, 138-146, 6-9 July 2016, Athens, Greece
Korres, C. Tzivanidis. Thermal analysis of an entire flat plate collector with a serpentine flow system and determination of the water and air flow and convection regime. In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Korres, C. Tzivanidis. Optical and thermal analysis of a new U‑type evacuated tube collector with a mini‑compound parabolic concentrator and a cylindrical absorber. In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Tzivanidis, S. Zoi, A. John. Simulation of a heat tank with phase change materials (PCM). In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Tzivanidis, S. Zoi, A. John. Simulation of a heat exchanger. In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Bellos, C. Tzivanidis, K.A. Antonopoulos Optical Performance and Optimization of Two Stationary Compound Parabolic Collectors (CPC), In Proceedings of “World Congress on Momentum, Heat and Mass Transfer (MHMT’16)”, paper no. 101, 4-5 April 2016, Prague, Czech Republic
Bellos, C. Tzivanidis, N. Zervas, G. Mitsopoulos, K.A. Antonopoulos, Energetic and Financial Comparison between a 1-Stage Absorption Chiller Driven by FPC and a 2-Stage Absorption Chiller Driven by PTC, In Proceedings of “World Congress on Momentum, Heat and Mass Transfer (MHMT’16)”, paper no. 102, 4-5 April 2016, Prague, Czech Republic
Bellos, C. Tzivanidis, K.A. Antonopoulos, Comparison of two solar driven absorption chillers for air-conditioning in Greece, In Proceedings of “6thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. I, 133-140, 8-11 July 2015, Athens, Greece
Bellos, C. Tzivanidis, K.A. Antonopoulos, Thermal performance of a direct-flow coaxial evacuated tube with solidworks flow simulation, In Proceedings of “6thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. II, 505-513, 8-11 July 2015, Athens, Greece
Bellos, C. Tzivanidis, D. Korres, K.A. Antonopoulos. Thermal analysis of a flat plate collector with Solidworks and determination of convection heat coefficient between water and absorber. In Proceedings of “The 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2015)”, 30 June – 3 July, 2015, Pau, France.
Bellos, C. Tzivanidis, A. Delis, K.A. Antonopoulos. Comparison of a solar driven heat pump heating system with other typical heating systems with TRNSYS. In Proceedings of “The 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2015)”, 30 June – 3 July, 2015, Pau, France.
Bellos, C. Tzivanidis, A. Prassas, K.A. Antonopoulos, Modelling of a solar assisted heating system with TRNSYS, In proceedings of “Global Conference on Global Warming GCGW-15”, 24-27 May 2015, Athens, Greece
Bellos, C. Tzivanidis, A. Kouvari, K.A. Antonopoulos, Comparison of heating and cooling loads of a typical building with TRNSYS and Equest, In proceedings of “Global Conference on Global Warming GCGW-15”, 24-27 May 2015, Athens, Greece
Tzivanidis, E. Bellos, Parametric analysis of Phase Change Materials in buildings, In Proceedings of “6thInternational Conference from Scientific Computing to Computational Engineering”, Vol. II, 405-413, 9-12 July 2014, Athens, Greece
Bellos, C. Tzivanidis, I. Touris, Effect of thermal mass in the cooling and heating loads of buildings, In Proceedings of “6thInternational Conference from Scientific Computing to Computational Engineering”, Vol. I, 161-168, 9-12 July 2014, Athens, Greece
Tzivanidis, E. Bellos, Parametric analysis of a solar refrigeration system with parabolic trough collectors (PTC), In Proceedings of “Material and renewable energy Conference – (MRE)”, 1-3 July 2013, Athens, Greece
Tzivanidis, E. Bellos, Economotechnical comparison of Photovoltaic collectors and Solar thermal collectors for a roof in Athens, In Proceedings of “Material and renewable energy Conference – (MRE)”, 1-3 July 2013, Athens, Greece
Tzivanidis, K.A. Antonopoulos, E.D. Kravvaritis. Effects of insulation and phase change materials (PCM) combinations on the energy consumption for buildings indoor thermal comfort. In Proceedings of “25th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2012)”, pp. 119–133, 26 – 29 June, 2012, Perugia, Italy.
Tzivanidis, K.A. Antonopoulos, F. Gioti. Adjustment of envelopes characteristics to climatic conditions for saving heating and cooling energy in buildings. In Proceedings of “25th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2012)”, pp. 24–39, 26 – 29 June, 2012, Perugia, Italy.
Tzivanidis, K.A. Antonopoulos, E.D. Kravvaritis. Numerical evaluation of the degree of phase change materials exploitation in building passive solar heating and cooling. In Proceedings of “24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2011)”, pp. 2007–2022, 4 – 7 July, 2011, Novi Sad, Serbia.
Tzivanidis, K.A. Antonopoulos, F. Gioti. Computational analysis of the envelope parameters effects on the transient heating energy consumption of buildings. In Proceedings of “24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2011)”, pp. 1894–1908, 4 – 7 July, 2011, Novi Sad, Serbia
Kitsopoulou, E. Bellos, D. Gonidaki, C. Sammoutos, P. Lykas, E. Vidalis, K. Polychronakis, G. Mitsopoulos, C. Tzivanidis, Multi-objective Evaluation of Cooling Passive Building Envelope Technologies for Optimal Thermal Performance and Indoor Comfort, In Proceedings of “International Conference ENERGY in BUILDINGS 2025”, 15 November 2025, Athens, Greece
Kitsopoulou, D.Pallantzas, G. Kosmadakis, C. Sammoutos, P. Lykas, E. Vidalis, D. Gonidaki, E. Bellos, C. Tzivanidis, Energy and thermal comfort investigation of a passive house building using field monitoring data, In Proceedings of “The 38thInternational Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems”, Paper ID: 7250, 29 June – 4 July, 2025, Paris, France
Kitsopoulou, E. Bellos, C. Sammoutos, P. Lykas, D. Gonidaki, E. Vidalis, G. Mitsopoulos, C. Tzivanidis, Development of a simplified comfort evaluation tool for multi-objective evaluation analysis of building energy retrofit strategies, In Proceedings of “Alternative Energy Sources, Materials & Technologies – (AESMT’25)”, 13 – 14 May, 2025, Sofia, Bulgaria
Bellos, C. Sammoutos, P. Lykas, A. Kitsopoulou, A. Arabkoohsar, C. Tzivanidis, I. Alexopoulos. A mini‑review of industrial waste sources, efficiency enhancement techniques, and heat upgrade solutions with an emphasis on thermochemical processes. In Proceedings of “The 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2024)”, pp. 2066–2077, 30 June – 5 July, 2024, Rhodes, Greece.
Bellos, P. Lykas, A. Kitsopoulou, C. Sammoutos, I. Alexopoulos, A. Arabkoohsar, C. Tzivanidis. Thermodynamic analysis of a solar‑driven absorption heat transformer for industrial process heat. In Proceedings of “The 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2024)”, pp. 2078–2089, 30 June – 5 July, 2024, Rhodes, Greece.
Alexopoulos, C. Tzivanidis, V. Papaefthimiou, P. Lykas. Thermochemical energy storage using CaCO₃/CaO simulation of the charging and discharging process. In Proceedings of “The 37th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2024)”, pp. 2185–2194, 30 June – 5 July, 2024, Rhodes, Greece.
Kitsopoulou, E. Bellos, P. Lykas, C. Sammoutos, M. Gr. Vrachopoulos, C. Tzivanidis, Συστηματική ανάλυση ενσωμάτωσης υλικών PCM και οπτικά προηγμένων επιστρώσεων οροφής για ένα τυπικό κτίριο στην Αθήνα / (A systematic analysis of PCM and optically advanced roof coatings integration for Athenian climatic conditions), In Proceedings of “13th National Conference of soft energy sources”, 15-17 May 2024, Athens, Greece
Sammoutos, P. Lykas, A. Kitsopoulou, E. Bellos, C. Tzivanidis, Μοντελοποίηση συγκεντρωτικού ηλιακού συστήματος με κεντρικό δέκτη σε συνδυασμό με κύκλο Brayton υπερκρίσιμου CO2 / (Dynamic modeling of a solar central receiver coupled to a supercritical brayton power cycle), In Proceedings of “13th National Conference of soft energy sources”, 15-17 May 2024, Athens, Greece
Lykas, A. Kitsopoulou, E. Bellos, C. Tzivanidis, Investigation of a solar-driven cogeneration unit for power and hydrogen production via Aspen plus software, In Proceedings of “International Journal of Polygeneration 2023”, 26-28 July 2023, Kuta, Bali, Indonesia
Lykas, A. Kitsopoulou, E. Bellos, C. Tzivanidis, Parametric investigation of a CO2-based polygeneration system driven by renewable energy sources, In Proceedings of “International Journal of Polygeneration 2023”, 26-28 July 2023, Kuta, Bali, Indonesia
Pavlovic, E. Bellos, M. Grozdanovic, V. Stefanovic, M. Vukic, M. Lakovic-Paunovic, C. Tzivanidis, Dynamic analysis of a solar dish concentrating collector coupled to an organic Rankine cycle with reheating, In Proceedings of “20thInternational Conference on Thermal Science and Engineering of Serbia”, 169-176, 18-21 October 2022, Niš, Serbia
Bellos, C. Tzivanidis, Polygeneration systems driven by renewable energy sources – A critical mini review for the units with organic Rankine cycles, In Proceedings of “6thInternational Conference on Polygeneration”, 351-359, 4-6 October 2021 Zaragoza, Spain
Bellos, C. Tzivanidis, Yearly dynamic investigation of a solar-trigeneration unit in Athens by using TRNSYS software, In Proceedings of “6thInternational Conference on Polygeneration”, 360-370, 4-6 October 2021 Zaragoza, Spain
Pavlovic, E. Bellos, V. Stefanovic, M. Ilic, M. Grozdanovic, C. Tzivanidis, The use flat plate collectors in a pumped thermal energy storage latent system, Ιn Proceedings of “15thInternational Conference on Accomplishments in Mechanical and Industrial Engineering – (DEMI 2021)”, 210-215, 28-29 May 2021, Banja Luka, Bosnia and Herzegovina
Pavlovic, V. Stefanovic, E. Bellos, C. Tzivanidis, Solar Thermal Collector Efficiency Map: A New Evaluation Tool, Ιn Proceedings of “The 5thInternational conference mechanical engineering in XXI century – (MASING)”, 43-46, 9-10 December 2020, Faculty of Mechanical Engineering in Nis, Serbia
Alexopoulos, C. Tzivanidis. Simulation of the operation of a heat tank with phase change materials (PCM). In Proceedings of “The 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2019)”, pp. 2483–2494, 23 – 28 June, 2019, Wrocław, Poland.
Pavlovic, E. Bellos, V. Stefanovic, M. Lakovic, B. Drobnjakovic, C. Tzivanidis, Energy and Exergy Design of a Solar Thermal System with Phase Change Materials, Ιn Proceedings of “19thConference on Thermal Science and Engineering of Serbia – (Simterm 2019)”, 269-278, 22–25 October 2019, Sokobanja, Serbia
A.C. Montenon, P. Tsekouras, C. Tzivanidis, M. Bibron, C. Papanicolas. Thermo‑optical modelling of the linear Fresnel collector at the Cyprus Institute. In AIP Conference Proceedings, p. 100004, 2019, Casablanca, Morocco.
Bellos, C. Tzivanidis, N. Nikolaou, G. Mitsopoulos, Yearly Performance of a Cogeneration System with Nanofluid-based Thermal Photovoltaic Coupled to a Heat Pump, In Proceedings of “EinB2018 – 7thInternational Conference ENERGY in BUILDINGS 2018”, 115-124, 3 November 2018, Athens, Greece
M.Th. Plytaria, C. Tzivanidis, E. Bellos, I. Alexopoulos, K.A. Antonopoulos, The impact of phase change materials in the heating and the cooling loads of a building, In Proceedings of “8th International Conference from Scientific Computing to Computational Engineering”, Vol. II, 386-395, 4-7 July 2018 Athens, Greece
Mitsopoulos, E. Syngounas, E. Bellos, C. Tzivanidis, S. Anagnostatos. Experimental and numerical evaluation of a supermarket refrigeration system. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
Mitsopoulos, E. Bellos, C. Tzivanidis, S. Anagnostatos, E. Papanikolaou. Multi‑criteria evaluation of a solar assisted heating system for various building envelopes. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
D.N. Korres, C. Tzivanidis, C. Lindos. Thermal investigation of a new flat plate collector with a coaxial flow tube. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
D.N. Korres, C. Tzivanidis. Simulation and optimization of an experimentally analyzed compound parabolic collector. In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
Alexopoulos, T. Christos, M.Th. Plytaria. The impact of fins on the operation of a heat tank with phase change materials (PCM). In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2018)”, 17 – 22 June, 2018, Guimarães, Portugal.
M.Th. Plytaria, C. Tzivanidis, I. Alexopoulos, E. Bellos, K.A. Antonopoulos, Application of Phase Change Materials on the underfloor heating system of a building in Athens using TRNSYS simulation software, In Proceedings of “The 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems”, 17-22 June 2018, Guimaraes, Portugal
Pavlovic, E. Bellos, V. Stefanovic, C. Tzivanidis, Comparison of a conical and a spiral absorber for a solar dish collector, in Proceedings of “10thInternational Symposium on Exploitation of Renewable Energy Sourses and Efficiency”, 39-44, 5-7 April 2018, Subotica, Serbia
Bellos, C. Tzivanidis, G. Tsifis, Eνεργειακή, εξεργειακή και οικονομική αξιολόγηση ενός κλιμακοειδούς συστήματος (cascade) απορρόφησης-μηχανικής συμπίεσης με χρήση ηλιακής ενέργειας / (Energetic, Exergetic and financial evaluation of a cascade absorption-compression refrigeration system driven by solar energy), In Proceedings of “11thNational Conference of soft energy sources”, Vol. Β(2), 907-918, 14-16 March 2018, Thessaloniki, Greece
E. Bellos, C. Tzivanidis, Ετήσια ενεργειακή και εξεργειακή απόδοση θερμοφωτοβολταϊκού συλλέκτη με χρήση νανορευστού / (Energetic and exergetic evaluation of a hybrid PV operating with nanofluids in yearly basis), In Proceedings of “11th National Conference of soft energy sources”, Vol. Β(2), 1193-1203, 14-16 March 2018, Thessaloniki, Greece
Mitsopoulos, E. Bellos, C. Tzivanidis, The insulation thickness as a design parameter in Greek climate, In Proceedings of “EinB2017 – 6thInternational Conference ENERGY in BUILDINGS 2017”, 99-108, 12 October 2017, Athens, Greece
Bellos, C. Tzivanidis, Thermodynamic Investigation of an Innovative Solar Driven Trigeneration System Ideal for the Building Sector, In Proceedings of “EinB2017 – 6thInternational Conference ENERGY in BUILDINGS 2017”, 109-118, 12 October 2017, Athens, Greece
Plytaria, C. Tzivanidis, E. Bellos, K.A. Antonopoulos, Thermal analysis of a building in Athens with phase change materials in roof using simulation program TRNSYS 17, In Proceedings of “7thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. II, 509-518, 5-8 July 2017, Athens, Greece
Bellos, C. Tzivanidis, M. Plytaria, Analytical Expression for Thermal Efficiency Coefficients of Parabolic Τrough Collectors, In Proceedings of “7thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. I, 67-74, 5-8 July 2017 Athens, Greece
Pavlovic, E. Bellos, V. Stefanovic, C. Tzivanidis, Experimental and numerical investigation of a solar dish collector with spiral absorber, In Proceedings of “13thInternational Conference on Accomplishments in Mechanical and Industrial Engineering – (DEMI 2017)”, 217-225, 26-27 May 2017, Banja Luka, Bosnia and Herzegovina
Tzinnis, E. Bellos, C. Tzivanidis, Parametric Analysis of a Solar Cooling system Designed for Athens Climate, In Proceedings of “EinB2016 – 5thInternational Conference ENERGY in BUILDINGS 2016”, 119-130, 12 November 2016, Athens, Greece
Bellos, C. Tzivanidis, K.A. Antonopoulos, Solar assisted heat pump space heating systems in Athens – An energetic and financial analysis, In Proceedings of “EinB2016 – 5thInternational Conference ENERGY in BUILDINGS 2016”, 41-48, 12 November 2016, Athens, Greece
Alexopoulos, C. Tzivanidis, E. Bellos, G. Mitsopoulos, D. Korres, Thermal Behavior of a Building Simulation using COMSOL, In Proceedings of “7thInternational Conference from Scientific Computing to Computational Engineering”, Vol. II, 409-413, 6-9 July 2016, Athens, Greece
Mitsopoulos, E. Bellos, C. Tzivanidis, I. Alexopoulos, D. Korres, The Impact of Insulation Thickness in Various Greek Cities, In Proceedings of “7thInternational Conference from Scientific Computing to Computational Engineering”, Vol. II, 385-394, 6-9 July 2016, Athens, Greece
Bellos, C. Tzivanidis, G. Mitsopoulos, I. Alexopoulos, Energetic, Exergetic and Financial Evaluation of Concentrating and No-Concentrating Solar Collectors, In Proceedings of “7thInternational Conference from Scientific Computing to Computational Engineering”, Vol. I, 138-146, 6-9 July 2016, Athens, Greece
Korres, C. Tzivanidis. Thermal analysis of an entire flat plate collector with a serpentine flow system and determination of the water and air flow and convection regime. In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Korres, C. Tzivanidis. Optical and thermal analysis of a new U‑type evacuated tube collector with a mini‑compound parabolic concentrator and a cylindrical absorber. In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Tzivanidis, S. Zoi, A. John. Simulation of a heat tank with phase change materials (PCM). In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Tzivanidis, S. Zoi, A. John. Simulation of a heat exchanger. In Proceedings of “The 29th International Conference on Efficiency, Cost, Optimisation, Simulation and Environmental Impact of Energy Systems (ECOS 2016)”, 19 – 23 June, 2016, Portorož, Slovenia.
Bellos, C. Tzivanidis, K.A. Antonopoulos Optical Performance and Optimization of Two Stationary Compound Parabolic Collectors (CPC), In Proceedings of “World Congress on Momentum, Heat and Mass Transfer (MHMT’16)”, paper no. 101, 4-5 April 2016, Prague, Czech Republic
Bellos, C. Tzivanidis, N. Zervas, G. Mitsopoulos, K.A. Antonopoulos, Energetic and Financial Comparison between a 1-Stage Absorption Chiller Driven by FPC and a 2-Stage Absorption Chiller Driven by PTC, In Proceedings of “World Congress on Momentum, Heat and Mass Transfer (MHMT’16)”, paper no. 102, 4-5 April 2016, Prague, Czech Republic
Bellos, C. Tzivanidis, K.A. Antonopoulos, Comparison of two solar driven absorption chillers for air-conditioning in Greece, In Proceedings of “6thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. I, 133-140, 8-11 July 2015, Athens, Greece
Bellos, C. Tzivanidis, K.A. Antonopoulos, Thermal performance of a direct-flow coaxial evacuated tube with solidworks flow simulation, In Proceedings of “6thInternational Conference on Experiments/Process/System Modelling/Simulation/Optimization”, Vol. II, 505-513, 8-11 July 2015, Athens, Greece
Bellos, C. Tzivanidis, D. Korres, K.A. Antonopoulos. Thermal analysis of a flat plate collector with Solidworks and determination of convection heat coefficient between water and absorber. In Proceedings of “The 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2015)”, 30 June – 3 July, 2015, Pau, France.
Bellos, C. Tzivanidis, A. Delis, K.A. Antonopoulos. Comparison of a solar driven heat pump heating system with other typical heating systems with TRNSYS. In Proceedings of “The 28th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2015)”, 30 June – 3 July, 2015, Pau, France.
Bellos, C. Tzivanidis, A. Prassas, K.A. Antonopoulos, Modelling of a solar assisted heating system with TRNSYS, In proceedings of “Global Conference on Global Warming GCGW-15”, 24-27 May 2015, Athens, Greece
Bellos, C. Tzivanidis, A. Kouvari, K.A. Antonopoulos, Comparison of heating and cooling loads of a typical building with TRNSYS and Equest, In proceedings of “Global Conference on Global Warming GCGW-15”, 24-27 May 2015, Athens, Greece
Tzivanidis, E. Bellos, Parametric analysis of Phase Change Materials in buildings, In Proceedings of “6thInternational Conference from Scientific Computing to Computational Engineering”, Vol. II, 405-413, 9-12 July 2014, Athens, Greece
Bellos, C. Tzivanidis, I. Touris, Effect of thermal mass in the cooling and heating loads of buildings, In Proceedings of “6thInternational Conference from Scientific Computing to Computational Engineering”, Vol. I, 161-168, 9-12 July 2014, Athens, Greece
Tzivanidis, E. Bellos, Parametric analysis of a solar refrigeration system with parabolic trough collectors (PTC), In Proceedings of “Material and renewable energy Conference – (MRE)”, 1-3 July 2013, Athens, Greece
Tzivanidis, E. Bellos, Economotechnical comparison of Photovoltaic collectors and Solar thermal collectors for a roof in Athens, In Proceedings of “Material and renewable energy Conference – (MRE)”, 1-3 July 2013, Athens, Greece
Tzivanidis, K.A. Antonopoulos, E.D. Kravvaritis. Effects of insulation and phase change materials (PCM) combinations on the energy consumption for buildings indoor thermal comfort. In Proceedings of “25th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2012)”, pp. 119–133, 26 – 29 June, 2012, Perugia, Italy.
Tzivanidis, K.A. Antonopoulos, F. Gioti. Adjustment of envelopes characteristics to climatic conditions for saving heating and cooling energy in buildings. In Proceedings of “25th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2012)”, pp. 24–39, 26 – 29 June, 2012, Perugia, Italy.
Tzivanidis, K.A. Antonopoulos, E.D. Kravvaritis. Numerical evaluation of the degree of phase change materials exploitation in building passive solar heating and cooling. In Proceedings of “24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2011)”, pp. 2007–2022, 4 – 7 July, 2011, Novi Sad, Serbia.
Tzivanidis, K.A. Antonopoulos, F. Gioti. Computational analysis of the envelope parameters effects on the transient heating energy consumption of buildings. In Proceedings of “24th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2011)”, pp. 1894–1908, 4 – 7 July, 2011, Novi Sad, Serbia