| Optimization of biogas production by co-digesting whey with diluted poultry manure J Gelegenis, D Georgakakis, I Angelidaki, V Mavris Renewable energy 32 (13), 2147-2160, 2007 | 348 | 2007 |
| Optimization of biogas production from olive-oil mill wastewater, by codigesting with diluted poultry-manure J Gelegenis, D Georgakakis, I Angelidaki, N Christopoulou, M Goumenaki Applied Energy 84 (6), 646-663, 2007 | 186 | 2007 |
| Optimum insulation thickness for external walls on different orientations considering the speed and direction of the wind I Axaopoulos, P Axaopoulos, J Gelegenis Applied Energy 117, 167-175, 2014 | 86 | 2014 |
| Optimal economic thickness of various insulation materials for different orientations of external walls considering the wind characteristics I Axaopoulos, P Axaopoulos, G Panayiotou, S Kalogirou, J Gelegenis Energy 90, 939-952, 2015 | 41 | 2015 |
| A simplified quadratic expression for the approximate estimation of heating degree-days to any base temperature JJ Gelegenis Applied Energy 86 (10), 1986-1994, 2009 | 34 | 2009 |
| An advanced eLearning environment developed for engineering learners M Samarakou, E Fylladitakis, WG Fruh, A Hatziapostolou, JJ Gelegenis International Journal of Emerging Technologies in Learning 10 (3), 22-33, 2015 | 31 | 2015 |
| Heating of a fish wintering pond using low-temperature geothermal fluids, Porto Lagos, Greece J Gelegenis, P Dalabakis, A Ilias Geothermics 35 (1), 87-103, 2006 | 29* | 2006 |
| Perspectives of energy efficient technologies penetration in the Greek domestic sector, through the analysis of Energy Performance Certificates J Gelegenis, D Diakoulaki, H Lampropoulou, G Giannakidis, ... Energy Policy 67, 56-67, 2014 | 27 | 2014 |
| Optimum external wall insulation thickness considering the annual CO2 emissions I Axaopoulos, P Axaopoulos, J Gelegenis, ED Fylladitakis Journal of Building Physics 42 (4), 527-544, 2019 | 25 | 2019 |
| Undergraduate studies in energy education–A comparative study of Greek and British courses JJ Gelegenis, DJ Harris Renewable energy 62, 349-352, 2014 | 23 | 2014 |
| Estimation of hourly temperature data from their monthly average values:: case study of Greece JJ Gelegenis Renewable energy 18 (1), 49-60, 1999 | 21 | 1999 |
| Technical and economic assessment of geothermal soil heating systems in row covered protected crops: A case study from Greece P Dalampakis, J Gelegenis, A Ilias, A Ladas, P Kolios Applied Energy 203, 201-218, 2017 | 13 | 2017 |
| Analysis of Muskingum equation based flood routing schemes JJ Gelegenis, SE Serrano Journal of Hydrologic Engineering 5 (1), 102-105, 2000 | 13 | 2000 |
| An analytical study of critical factors in residential cogeneration optimization J Gelegenis, G Mavrotas Applied Energy 185, 1625-1632, 2017 | 12 | 2017 |
| Determination of fixed expenses in central heating costs allocation: An arising issue of dispute JJ Gelegenis, D Harris, D Diakoulaki, H Lampropoulou, G Giannakidis Management of Environmental Quality: An International Journal 26 (6), 810-825, 2015 | 11 | 2015 |
| Analysis of the energy and cost savings caused by using condensing boilers for heating dwellings in Greece V Bonaros, J Gelegenis, D Harris, G Giannakidis, K Zervas The 5th International Conference on Applied Energy ICAE, 2013 | 11 | 2013 |
| Feasibility for the use of flat booster reflectors in various photovoltaic installations JJ Gelegenis, P Axaopoulos, S Misailidis, G Giannakidis, M Samarakou, ... International Journal of Renewable Energy Research 5 (1), 82-98, 2015 | 10 | 2015 |
| Rapid estimation of geothermal coverage by district-heating systems J Gelegenis Applied energy 80 (4), 401-426, 2005 | 10 | 2005 |
| A multi-parametric mathematical approach on the selection of optimum insulation thicknesses in buildings J Gelegenis, P Axaopoulos Buildings 7 (1), 15, 2017 | 9 | 2017 |
| Consider heat pumps for CPI applications JJ Gelegenis, NG Koumoutsos Chemical engineering progress 92 (2), 1996 | 9 | 1996 |
Petros AxaopoulosProfessor, University of West Attica, Athens, GreeceVerified email at uniwa.gr
