The present study deals with the subject of solar potential estimation for a
selected urban area in Thessaloniki, Greece. Solar potential mapping has been a subject
of interest in the past decades as a result of the growing increase in solar energy
conversion systems demand globally. A main drive behind this increase in demand in
Greece is the recently imposed European legislation regarding the minimization of the
total energy consumption in the building sector, which was proven to be among the
largest energy consumers. The legislation dictates that all buildings constructed from
the beginning of 2021 onwards need to classify as nearly-zero energy buildings, meaning
that their energy requirements need to be minimized and the remaining needs have to
be covered by renewable energy to the highest possible extent. Solar energy presents
as the most readily available solution to this problem, since it is abundant and easily
convertible, especially in the context of Greece. Systems that can utilize solar energy
for the production of heat or electricity have been consistently improving regarding their
efficiency and applicability, recently presenting the opportunity to be used as building
integrated systems, in addition to building applied solutions.
For the correct selection and dimensioning of a solar energy conversion system,
a dynamic solar potential estimation through solar mapping is essential and therefore
included in this study. The buildings and surrounding environment of the selected area
are recreated in a digital 3D environment, using the Energy3D CAD and simulation
software. The model is simulated for one day every month of the year regarding the
solar potential of the created surfaces and the results are presented and analyzed.
Additionally, an indicative comparative analysis of the potential photovoltaic electricity
production is carried out, by placing a single photovoltaic panel on each available surface
of the model and trying to determine which surfaces offer the greatest electricity
production potential and why. Finally, the annual solar potential of the examined area
is determined, while an indicative solar map of the area is constructed. Regarding the
electricity production calculations, it was concluded that horizontally placed PV panels
were the most productive within the span of a year, followed by vertically placed panels
on the northeast facades.
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