Development of thermal network to simulate light structured buildings and comparison with heavy structured buildings
Visualitza/Obre
Estadístiques de LA Referencia / Recolecta
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/169746
Tutor / directorFeldheim, Véronique
Realitzat a/ambFaculté polytechnique de Mons
Tipus de documentProjecte Final de Màster Oficial
Data2018
Condicions d'accésAccés obert
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continguts d'aquesta obra estan subjectes a la llicència de Creative Commons
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Abstract
In the past years there have been numerous researches centred in the optimization of
the simplified thermal network models, in order to simulate the thermal behaviour of
buildings. The present master thesis has been done within the frame of the RESIZED
project – a multidisciplinary project on energy savings funded by the European Union –
at the Department of Thermal Engineering and Combustion at the Faculty of Engineering
of the University of Mons; the thesis forms part of a bigger research whose main
objective consist in simulating the energy consumption and the thermal behaviour of a
whole district composed by different typologies of buildings. The latter might be a
complex and difficult task to carry out. Hence, in order to make it easier, the simplified
models (which reduce the heating problems into few parameters) will be employed.
This dissertation is focused on a specific simplified RC model: 4R3C model. The
mentioned model is composed by a thermal network that connects together two 2R1C
branches: the first one represents the envelope of the building that is in contact with the
outside air and the second one means to represent the building’s floor. There is an extra
capacitor that is attached to the connection point of the two branches, which represents
the internal temperature of the building and, consequently, its internal capacitance.
Therefore, the goal of this master thesis consists in studying the evolution of the model’s
components - resistances and capacitors - on the light structured buildings and
comparing them with the ones achieved on the heavy structured buildings.
The data for both light and heavy structured buildings will be obtained in TRNSYS, a
simulation software that uses measuring “real” data to calculate the building’s internal
temperature and the actuating heat fluxes. Then, the obtained outcome is ran with an
optimization process (by using Matlab software) that determines the most suitable values
for the 4R3C model’s components in order to give the maximum fitting proportion on the
same output variables (temperatures and heat fluxes) that TRNSYS gives.
In order to carry out the study, two different parameters have been observed. On the
one hand, the fitting proportion on the building’s internal temperature between the data
provided by TRNSYS and the data provided by the Matlab model. On the other hand, the
relation of the 4R3C model’s components determined with Matlab and the ones calculated
theoretically with the buildings properties.
As for the structure of the thesis, three studies can be distinguished. The first
research has been focused on analysing the impact of different heating loads and indoor
conditions on the model’s components; both on light and heavy structured buildings. As
the study reveals, the use of heating systems on the buildings brings the most precise
results.
The second and most relevant study has been centred on analysing how the
components of light and heavy structured buildings are influenced by variations on four
different characteristics of each type of building: the building’s floor surface, its width-todepth ratio, its windows-to-floor surface ratio and its orientation angle. As it has been
proven, the fitting proportion of the internal temperature has been higher than 80% in
both types of buildings. Moreover, the resistances have obtained more accurate results
than capacitances in both cases compared to the “real” values. In addition, the
capacitances results of the light structured buildings have been more precise than the
ones acquired for the heavy structured buildings.
The third and last main study of this master thesis has consisted on verifying the
employed model by making a simulation of a whole year duration. This has revealed that
the used model is correct.
TitulacióMÀSTER UNIVERSITARI EN ENGINYERIA INDUSTRIAL (Pla 2014)
Col·leccions
Fitxers | Descripció | Mida | Format | Visualitza |
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MiguelSolchagaErneta_MemoryTFM.pdf | 2,090Mb | Visualitza/Obre |