Abstract:The basic assumption of an energy-efficient project is the proper relation with the local climatic context. To analyse a building's performance before its construction, it is necessary that the object to be designed is recreated in a virtual environment, to evaluate its thermal balance. In order to recreate this virtual environment, it is necessary to use computer programs, and that requires a file composed of a weather database organized hourly in a specific year and defined, in the case of this article, from… Show more
“…The climatic data for 10 years (from 2006 to 2015) were provided by Pelotas’ Agroclimatology Station, in partnership with the Brazilian Agricultural Research Corporation (EMBRAPA), 71 and after analysis, the weather file was developed based on the average monthly temperatures of 2014 using the TRY method. 72 Table 5 illustrates the climatic data for the city of Pelotas.Figure 3.Monthly climatic data for the city of Pelotas. 71 …”
The standard Brazilian school projects (EMEIs) were created for the Proinfância [Pro-Childhood] program to respond to the growing national demand for public schools. Unfortunately, the project disregards the Brazilian local climate, leading to an inadequate architectural design, especially in terms of energy performance. Within this context, this research aimed to assess the impact of a new geometric design and envelope proposal on the energy performance of a Brazilian school building. The study object is a standard project (EMEI) of the Proinfância program located in Pelotas, Brazil. Two distinct multi-objective optimizations were performed based on EnergyPlus coupled with the Strength Pareto Evolutionary Algorithm 2 (SPEA2), in which the objective functions were defined to minimize heating and cooling Energy Use Intensity (EUI) for different geometric designs (Base and Linear models). The design variables considered were window-to-wall ratio (WWR); thermal insulation thickness for walls and floor; solar absorptance values for walls and roof; and solar orientation. A total of 74.520 simulations were carried out, and the results indicated that the new geometric design combined with bioclimatic envelope strategies was capable of reducing 52% of the Energy Use Intensity when compared to the standard school project.
“…The climatic data for 10 years (from 2006 to 2015) were provided by Pelotas’ Agroclimatology Station, in partnership with the Brazilian Agricultural Research Corporation (EMBRAPA), 71 and after analysis, the weather file was developed based on the average monthly temperatures of 2014 using the TRY method. 72 Table 5 illustrates the climatic data for the city of Pelotas.Figure 3.Monthly climatic data for the city of Pelotas. 71 …”
The standard Brazilian school projects (EMEIs) were created for the Proinfância [Pro-Childhood] program to respond to the growing national demand for public schools. Unfortunately, the project disregards the Brazilian local climate, leading to an inadequate architectural design, especially in terms of energy performance. Within this context, this research aimed to assess the impact of a new geometric design and envelope proposal on the energy performance of a Brazilian school building. The study object is a standard project (EMEI) of the Proinfância program located in Pelotas, Brazil. Two distinct multi-objective optimizations were performed based on EnergyPlus coupled with the Strength Pareto Evolutionary Algorithm 2 (SPEA2), in which the objective functions were defined to minimize heating and cooling Energy Use Intensity (EUI) for different geometric designs (Base and Linear models). The design variables considered were window-to-wall ratio (WWR); thermal insulation thickness for walls and floor; solar absorptance values for walls and roof; and solar orientation. A total of 74.520 simulations were carried out, and the results indicated that the new geometric design combined with bioclimatic envelope strategies was capable of reducing 52% of the Energy Use Intensity when compared to the standard school project.
“…Para realizar as simulações comparativas entre os dados coletados nos ensaios e os dados do programa WUFI Pro 6.5, foi adotado como critério a escolha de um tijolo cerâmico da base de dados com as características mais próximas possíveis às da norma ABNT NBR 15220 (2003), conforme Tabela 1. Para as condições internas foi utilizado o arquivo criado anteriormente no programa EnergyPlus 9.0, e para o clima externo, foi utilizado um arquivo climático para a cidade de Pelotas-RS (LEITZKE et al, 2018). A chuva dirigida foi considerada conforme a norma ASHRAE Standard 160 (ASHRAE, 2009), segundo Zanoni et al (2018).…”
A presença de umidade nos edifícios pode ser responsável pelo aparecimento de manifestações patológicas. Através de simulações computacionais, pode-se prever como o material se comportará quando exposto a condições diversas e, para isso, as características higrotérmicas dos elementos de construção são de suma importância. No Brasil, existe uma lacuna nos estudos sobre as propriedades higrotérmicas dos materiais, comprometendo as simulações. Esse artigo apresenta a caracterização das propriedades higrotérmicas do tijolo cerâmico de uma olaria do Sul do Brasil, desenvolvidos junto ao laboratório LAMTAC - NORIE da UFRGS. Foram realizados ensaios de resistência à difusão de vapor de água, absorção de água e isotermas. Os resultados desses ensaios foram simulados no WUFI Pro 6.5, a fim de comparar esses dados com os valores disponíveis na base de dados do programa para um tijolo de características similares. Ao analisar o crescimento de fungos filamentosos, notamos uma diferença de 3% em favor dos valores presentes na base de dados, indicando uma maior probabilidade de crescimento. Em relação à condensação superficial, observamos uma diferença máxima de 2,29 °C entre as condições simuladas, constatando uma maior ocorrência ao utilizar os dados dos ensaios, principalmente ao considerar as temperaturas mínimas das superfícies internas das fachadas.
“…The model settings were configured in the IDF editor of version 8.3 of EnergyPlus software. Occupancy and lighting schedules were configured according to the RTQ-R (Quality Technical Regulation for the energy efficiency level for residential buildings) (INMETRO, 2010). RTQ-R is a Brazilian residential building energy efficiency regulation.…”
Section: Building Modeling and Simulationmentioning
A importância de considerar as pontes térmicas e seus impactos no cálculo de transmitância térmica é um assunto que tem sido discutido em regiões de clima com estação fria no Brasil. A presença de pontos vulneráveis no envelope do edifício pode ter consequências no desempenho térmico, além das implicações nas paredes e coberturas do edifício, como por exemplo a formação de fungos filamentosos. Várias normas e regulamentos tratam da temática. Esse estudo tem por objetivo discutir, por intermédio de simulação computacional, a necessidade das normas Brasileiras de desempenho considerarem a possibilidade de formação de fungos filamentosos nas edificações com baixo e elevado isolamento térmico. Na análise examina-se as condições termo-higrométricas próximas a estrutura de concreto armado do modelo da edificação onde ocorrem as pontes térmicas, e as superfícies dos fechamentos vertical, de alvenaria, para todas as fachadas. Os resultados mostram que existe uma elevada probabilidade de crescimento dos fungos filamentosos nas pontes térmicas quando o edifício é mais isolado, ou seja, apresenta baixa transmitância térmica.
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