Περίληψη σε άλλη γλώσσα
The present thesis deals with the energy classification and the environmental evaluation of the school buildings in Greece. In the field of energy savings, the interest towards the school sector is deeply motivated: schools have standard energy demands and high levels of environmental comforts should be guaranteed. With the participation of 1100 schools from all the prefectures of Greece, energy auditing techniques were used to create a database on the energy use in the school field. The energy performance of the school buildings, in relation to the normalized annual consumption for heating regarding floor area and climatic conditions, was rated using a clustering technique (K-means algorithm) and an energy classification tool developed. The audited school buildings were classified into five energy categories, A, B, C, D and E. To investigate the potential for energy savings a methodology for the definition of the characteristics of the typical building for each energy class of the sch ...
The present thesis deals with the energy classification and the environmental evaluation of the school buildings in Greece. In the field of energy savings, the interest towards the school sector is deeply motivated: schools have standard energy demands and high levels of environmental comforts should be guaranteed. With the participation of 1100 schools from all the prefectures of Greece, energy auditing techniques were used to create a database on the energy use in the school field. The energy performance of the school buildings, in relation to the normalized annual consumption for heating regarding floor area and climatic conditions, was rated using a clustering technique (K-means algorithm) and an energy classification tool developed. The audited school buildings were classified into five energy categories, A, B, C, D and E. To investigate the potential for energy savings a methodology for the definition of the characteristics of the typical building for each energy class of the school sector has been developed using multivariate statistical techniques. It is based on a selection of seven variables that influence the energy performance of the building and has been mainly carried out using principal components analysis techniques (PCA). For the evaluation of indoor temperatures, the heating loads and the potential for energy conservation interventions, the typical buildings in each class have been simulated for a typical meteorological year, using TRNSYS 15.1. The measurements of indoor air quality concerned in concentrations of monoxide (CO) and carbon dioxide (CO₂), as well as in the organic volatile compounds (TVOCs) in 83 classrooms. Thermal comfort conditions have been calculated using the indoor measurements of the meteorological parameters. The research has shown than school buildings suffer from important IAQ problems while their energy consumption and global environmental quality can be improved considerably. The conclusions obtained promote a general energy and environmental evaluation of the school buildings in Greece.
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