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Authors
Abstract(s)
Este trabalho teve como objetivo simular o comportamento térmico das fachadas de
algumas construções do centro histórico da cidade de Viseu, para avaliar o risco de condensação
superficial, utilizando para tal o programa CitySim. Buscando compreender e demonstrar o
potencial e versatilidade do software, além de analisar os resultados obtidos com as simulações.
Inicialmente foi realizada uma revisão bibliográfica contemplando normas que
impactam nas questões térmicas e energéticas das edificações existentes em Portugal e
softwares presentes no mercado que apresentavam certa similaridade com o escolhido. A partir
disso, realizou-se a modelação tridimensional do quarteirão selecionado e sua calibração com
as informações construtivas dos edifícios e questões climáticas da cidade.
Após a demonstração geral de resultados, foi escolhido analisar temperaturas das
paredes externas de um grupo selecionado de fachadas, representando várias situações diante
do aglomerado de edifícios. O processo de simulação gerou uma grande amostra de dados
permitindo realizar algumas inferências e relações. Destas destacaram-se os períodos com risco
de condensação das fachadas. Com os dados levantados, foram efetuadas comparações com
duas outras situações hipotéticas: a introdução de um isolante térmico face interior das fachadas
dos edifícios e a simulação do aumento dastemperaturas exteriores num possível cenário futuro.
O resultado da simulação atual demostrou que as fachadas sofrem com o risco de
condensação superficial externa durante uma porcentagem significativa do ano. Em
contrapartida, os dados da simulação com a adição do isolante térmico resultou no aumento
dessa porcentagem, pôr fim a terceira simulação ressaltou a influencia do aumento das
temperaturas nesse fenômeno, pois o porcentual de horas com risco de condensação caiu
drasticamente.
Adicionalmente, o trabalhou permitiu compreender a grande versatilidade do programa
e verificou-se que o programa pode ser utilizado em múltiplos contextos: estudos de diferentes
escalas, e edifícios já existentes, ou em construção, ou planejamento, mostrando uma grande
versatilidade.
ABSTRACT: This work aimed to simulate the thermal behavior of the facades of some buildings in the historic center of the city of Viseu, to assess the risk of surface condensation, using the CitySim program for this purpose. Seeking to understand and demonstrate the potential and versatility of the software, in addition to analyzing the results obtained with the simulations. Initially, a bibliographical review was carried out covering standards that impact the thermal and energy issues of existing buildings in Portugal and software present on the market that presented a certain similarity with the chosen one. From this, three-dimensional modeling of the selected block was carried out and its calibration with the constructive information of the buildings and climate issues in the city. After the general demonstration of results, it was chosen to analyze the temperatures of the external walls of a selected group of facades, representing various situations within the cluster of buildings. The simulation process generated a large sample of data allowing some inferences and relationships to be made. Of these, periods with a risk of condensation on the facades stood out. With the data collected, comparisons were made with two other hypothetical situations: the introduction of a thermal insulator on the interior of the building facades and the simulation of the increase in external temperatures in a possible future scenario. The result of the current simulation demonstrated that facades suffer from the risk of external surface condensation during a significant percentage of the year. In contrast, the simulation data with the addition of thermal insulator resulted in an increase in this percentage. Finally, the third simulation highlighted the influence of increased temperatures on this phenomenon, as the percentage of hours with risk of condensation fell drastically. Additionally, the work allowed us to understand the great versatility of the program and it was found that the program can be used in multiple contexts: studies of different scales, and existing buildings, those under construction, or planning, showing great versatility.
ABSTRACT: This work aimed to simulate the thermal behavior of the facades of some buildings in the historic center of the city of Viseu, to assess the risk of surface condensation, using the CitySim program for this purpose. Seeking to understand and demonstrate the potential and versatility of the software, in addition to analyzing the results obtained with the simulations. Initially, a bibliographical review was carried out covering standards that impact the thermal and energy issues of existing buildings in Portugal and software present on the market that presented a certain similarity with the chosen one. From this, three-dimensional modeling of the selected block was carried out and its calibration with the constructive information of the buildings and climate issues in the city. After the general demonstration of results, it was chosen to analyze the temperatures of the external walls of a selected group of facades, representing various situations within the cluster of buildings. The simulation process generated a large sample of data allowing some inferences and relationships to be made. Of these, periods with a risk of condensation on the facades stood out. With the data collected, comparisons were made with two other hypothetical situations: the introduction of a thermal insulator on the interior of the building facades and the simulation of the increase in external temperatures in a possible future scenario. The result of the current simulation demonstrated that facades suffer from the risk of external surface condensation during a significant percentage of the year. In contrast, the simulation data with the addition of thermal insulator resulted in an increase in this percentage. Finally, the third simulation highlighted the influence of increased temperatures on this phenomenon, as the percentage of hours with risk of condensation fell drastically. Additionally, the work allowed us to understand the great versatility of the program and it was found that the program can be used in multiple contexts: studies of different scales, and existing buildings, those under construction, or planning, showing great versatility.
Description
Keywords
Risco de condensação Centro histórico Modelação tridimensional Comportamento térmico CitySim