This dissertation was written as a part of the MSc in Energy Building Design at the International Hellenic University.
Europe has set highly ambitious goals as it targets to become the first climate-neutral
continent by 2050, thus having zero net GHG emissions. Buildings account for approximately 40% and 36% of European Union’s energy consumption and GHG emissions
respectively. There is a huge potential for retrofitting existing buildings in Greece, as
the majority of them were built before 1980 thus they are not thermally insulated. The
main goal of the thesis is the examination of the effects of specific passive techniques
on heating and cooling demand when applied on an existing multi-family building
which is located in the city center of Thessaloniki in Greece. The examined passive
techniques are window replacement, thermal insulation, Trombe wall, sunspace,
thermal chimney and green façade. Hence, seven primary scenarios are created; one
for each passive technique plus the base-case scenario which refers to the building as
was constructed. Except from the base-case scenario, all other scenarios consist of
their own sub-scenarios for which a parametric analysis is performed in order to optimize the examined passive technique. Therefore, the best-case sub-scenarios from
each scenario are compared in order to determine the most suitable intervention. The
geometry of the building was designed in SketchUp Make 2017 with the use of the Euclid (version 0.9.3) extension tool while the simulations were performed in EnergyPlus
(version 8.7) software.
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