Applications of renewable energy resourses to obtain an energy autonomous residence

D. Kavvadias, Applications of renewable energy resourses to obtain an energy autonomous residence , Diploma thesis, 150 pages, July 2017.



The target of the current thesis is to determine the energy needs of a residential building and examine how these can be covered with renewable energy systems, in order to make it autonomous. At first, the appropriate theoretical background is given which is related to the project. There is a reference to the needs that an existing building has and to the factors that are related to them. Heating, cooling and electricity demands seems to be the largest ones, so more emphasis is given to them. Secondly, there is an introduction to the sources, both renewable and conventional, that can be used to cover the energy need of a building. There are also stated the available amounts of each source not only in Greece but also in the whole world, as well as the development of their usage throughout the years. As long as this thesis is referring to the building sector, there is an extensive reference to renewable energy systems applied to the surrounding or the envelop of a building. More specific there is a description of their main characteristics, principles of operation and possible ways that can be followed for their installation. In order to apply this study to reality, there has been chosen an existing residence in the region of Dionysos. Firstly, there were determined the energy demands of this house taking into consideration the energy losses for the heating load and afterwards with the use of specific methodologies these demands were transformed into the annual energy consumption. After calculating the energy needs of the building, there is investigated the way that they could be covered reclaiming the available renewable energy in the region. Photovoltaic systems, solar collectors, wind turbines and biomass are the main renewable applications that are studied. So there is an analytical estimation of the energy production of each source. During the calculation of heating load there was noticed that windows are affecting intensively the losses of the building so there is studied the scenario of replacing them with new energy windows. Last but not least, there is chosen a final combination of the above applications so as to make the house autonomous, taking into consideration not only the produced energy but also the indicative cost of the equipment. Comparing the cost of the existing and the proposed system there is an estimation of the years needed to deaden the initial fund.

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