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Título
Statistical analysis of energy performance certificates of maltese offices
Autor
Director o Tutor
Año del Documento
2022
Titulación
Grado en Ingeniería en Organización Industrial
Zusammenfassung
The number of energy performance certificates (EPCs) of offices in Malta represent
around 18.60% of the total stock of EPCs for non-dwellings between the period 2010
and 2018, which is significant. Consequently, this dissertation aims to analyse these
certificates in order to determine the overall statistical distribution and to identify the
worst performing categories, in accordance with the updated EU Energy Performance
of Buildings Directive (EU) 2018/844, and to propose pathways to improve their
performance through deep renovation to near zero-energy status.
Office buildings were categorised into four different groups based on total floor area
which is in line with the National Cost Optimal Study of 2018 (≤250, ≤500, ≤1500 and
>1500 m²). Results have shown that the primary energy rating and its corresponding
Energy Class Rating of these office clusters are different in value, which justifies the
categorisation by floor area. Statistical analysis has also revealed that most offices had
Energy Class C or D, with the larger offices exhibiting more efficient tendencies
(Classes B and C). A number of offices have been considered as outliers because they
had EPC rating that were beyond the acceptable limits of statistical tests such as Box
and Whiskers Plot, Residual Plots, One-Way ANOVA and Regression Analyses.
The study on energy efficiency measures was divided into three main parts, namely the
building envelope, the building energy systems and renewables (solar photovoltaics).
It was found that the implementation of the optimum building envelope and building
energy system measures have yielded an improvement ranging from 28% to 46% for
the four office clusters, which is significant and in line with the EU “Energy Efficiency
First” Principle, whereby one needs to reduce energy demand before applying
renewable energy. With the addition of solar photovoltaics at roof level, all office
clusters demonstrated a high potential of achieving a positive renewable energy
building, which means that the office becomes a net energy producer.
In conclusion, it was recommended that stronger control is needed to ensure quality
EPCs. Results that are far from reasonable should clearly be justified or reviewed.
Moreover, this study has identified the potential available for the office building sector
to contribute towards its decarbonisation with clear and well defined stepped approach,
which should help the policy maker to take informed decisions on the deep renovation
approaches to be considered for office buildings. Análisis estadístico de los certificados de eficiencia energética de las oficinas maltesas mediante una metodología propia que consiste en, inicialmente, la creación y depuración de clusters ( en función del área de suelo de la oficina) a partir de un conjunto amplio de observaciones obtenidas de la base de datos de EPC aportada por el Instituto de Energías Renovables de Malta. Seguido del análisis de dichos clusters por separado para obtener oficinas de referencia con las que poder simular medidas energéticas en el software SBEM-mt y de esta forma obtener una vista de la eficiencia energética de estas medidas y su importancia en la mejora de la calificación energética del EPC del edificio simulado.
Materias Unesco
1209.01 Estadística Analítica
Palabras Clave
analysis
office
clusters
energy
EPC
Departamento
Departamento de Ingeniería Energética y Fluidomecánica
Idioma
eng
Derechos
openAccess
Aparece en las colecciones
- Trabajos Fin de Grado UVa [28700]
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