There is an urgent need for replacement of fossil fuels worldwide. Raw biomass has a low energy density, contains too much moisture, can rot, and it is hygroscopic. This paper presents a very prominent thermal technology that could overcome mentioned deficiencies of raw biomass. This technology is known as torrefaction. Torrefaction is mainly used to convert lignocellulosic materials into 'fuels' that can be used in power plants, combustion units, or gasifiers.
This paper presents a comparative analysis of solar energy potential for six
different cities, in six different countries in Europe: Freiburg (Germany),
Graz (Austria), Maribor (Slovenia), Banja Luka (Bosnia and Herzegovina), Nis
(Serbia), and Athens (Greece). Data processed in this work are accessed from
Photovoltaic Geographical Information System (PVGIS). Photovoltaic
technology is crystalline silicon, and installed peak photovoltaic power is
5 kWp. The aim of the work is to find out whether there are statistically
significant differences among the cities in relation to monthly energy
production in regard to different types of photovoltaic system (fixed - free
standing, fixed - building integrated, inclined, and two axis solar power
plants). The work is based on four hypotheses. The estimation of solar
energy production in different regions is very important for determination
of potential regions suitable for generation of renewable and sustainable
energy.
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