George Galanis

Dr. George Galanis

Mathematical Modeling and Applications Laboratory, Hellenic Naval Academy, Piraeus, Greece

Research Focus & Metrics

Academic Career Length

23Years (2004-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 February 2022 in Renewable and Sustainable Energy Reviews
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Journal Article
Closed access
GZGang Zhang
Gang Zhang
DYDazhi Yang
Dazhi Yang
GGGeorge Galanis
George Galanis
EAEmmanouil Androulakis
Emmanouil Androulakis

1 May 2016 in Renewable Energy
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Journal Article
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GEGeorge Emmanouil
George Emmanouil
GGGeorge Galanis
George Galanis
CKChristina Kalogeri
Christina Kalogeri
GZGeorge Zodiatis
George Zodiatis
GKGeorge Kallos
George Kallos

8 August 2019 in Energies
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Journal Article
Open access
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COCarlos Otero-Casal
Carlos Otero-Casal
Platon PatlakasPlaton Patlakas
Platon Patlakas
MPMiguel A. Prósper
Miguel A. Prósper
GGGeorge Galanis
George Galanis
GMGonzalo Miguez Macho
Gonzalo Miguez Macho
Regional microscale meteorological models have become a critical tool for wind farm production forecasting due to their capacity for resolving local flow dynamics. The high demand for reliable forecasting tools in the energy industry is the motivation for the development of an integrated system that combines the Weather Research and Forecasting (WRF) atmospheric model with an optimization obtained by the conjunction of a Kalman filter and a Bayesian model. This study focuses on the development and validation of this combined system in a very dense wind farm cluster located in Galicia (Northwest of Spain). A period of one year is simulated at 333 m horizontal resolution, with a daily operational forecasting set-up. The Kalman-Bayesian filter was tested both directly on wind speed and on the U-V (zonal and meridional) components for nowcasting periods from 10 min to 6 h periods, all of them with important applications in the wind industry. The results are quite promising, as the main statistical error indices are significantly improved in a 6 h forecasting horizon and even more in shorter horizon cases. The Mean Annual Error (MAE) for 1 h nowcasting horizon is 1.03 m/s for wind speed and 12.16 ° for wind direction. Moreover, the successful utilization of the integrated system in test cases with different characteristics demonstrates the potential utility that this tool may have for a variety of applications in wind farm operations and energy markets.

4 March 2020 in Energies
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Journal Article
Open access
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Nikolaos KampelisNikolaos Kampelis
Nikolaos Kampelis
GPGeorgios Papayiannis
Georgios Papayiannis
DKDionysia Kolokotsa
Dionysia Kolokotsa
GGGeorge Galanis
George Galanis
DIDaniela Isidori
Daniela Isidori
AYAthanasios N. Yannacopoulos
Athanasios N. Yannacopoulos
The operation of buildings is linked to approximately 36% of the global energy consumption, 40% of greenhouse gas emissions, and climate change. Assessing the energy consumption and efficiency of buildings is a complex task addressed by a variety of methods. Building energy modeling is among the dominant methodologies in evaluating the energy efficiency of buildings commonly applied for evaluating design and renovation energy efficiency measures. Although building energy modeling is a valuable tool, it is rarely the case that simulation results are assessed against the building’s actual energy performance. In this context, the simulation results of the HVAC energy consumption in the case of a smart industrial near-zero energy building are used to explore areas of uncertainty and deviation of the building energy model against measured data. Initial model results are improved based on a trial and error approach to minimize deviation based on key identified parameters. In addition, a novel approach based on functional shape modeling and Kalman filtering is developed and applied to further minimize systematic discrepancies. Results indicate a significant initial performance gap between the initial model and the actual energy consumption. The efficiency and the effectiveness of the developed integrated model is highlighted.

1 May 2004 in Nonlinear Analysis
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Journal Article
Closed access
PPP.K. Palamides
P.K. Palamides
GGGeorge Galanis
George Galanis

2 July 2012 in The International Journal of Aviation Psychology
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Journal Article
Closed access
MBMarcus A. Butavicius
Marcus A. Butavicius
AVArmando Vozzo
Armando Vozzo
HBHelen Braithwaite
Helen Braithwaite
GGGeorge Galanis
George Galanis
This study evaluated the effectiveness of a virtual reality parachute training simulator as part of an extant training schedule in the Australian Army. A simulation group received training in the simulator and a non-simulation group received only classroom-based instruction. Training was assessed in subsequent live jumps with instructors using an off-course augmented feedback schedule. There was no significant difference in jump accuracy, jump safety, or confidence between the two groups. However, participants who trained in the simulator required less feedback correction during live jumps.