I.
Renewable energy sources –
energy assessment
Variability of solar and wind energy outputs in relation with the weather and climate conditions in Bulgaria
Peter Ivanov 5-11
Seasonal variation of PV efficiency for various technologies and module inclinations
Gilles Notton, Vladimir Lazarov, Ludmil Stoyanov, Said Diaf, Nicolas Heraud 12-19
Analysis of the daily and monthly solar radiation for the region of Ruse
Ivaylo Stoyanov, Nicolay Mihailov 20-24
II. Renewable energy sources – technologies
First approach of a MatLab/Simulink simulation for a PV/T solar collector behaviour
Gilles Notton, Nicolas Héraud, Christian Cristofari, Ahmed Youssouf, Mohamed Kahyeh 25-32
Comparison of energy conversion systems for variable speed wind turbine application
Daniel
Roye, Vladimir Lazarov, Dimitar Spirov, Ludmil
Stoyanov
33-39
A review of some
technical and economic features of energy storage
technologies for distribution system integration
Gauthier Delille, Bruno François 40-48
III. Renewable energy sources –biofuels
A review of biodiesel fuel as fuel for transport
Dobromir
Yordanov, Petko Petkov,
Yanko
Dimitrov
49-57
Bioethanol: industrial manufacturing, perspectives and problems.
Kantcho Lahtchev 58-69
The biogas as an alternative energy source
Ivan Simeonov 70-79