Banca de DEFESA: Luísa Coutinho Puntel

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Luísa Coutinho Puntel
DATE: 17/06/2024
TIME: 14:00
LOCAL: Videoconferência - https://www.ppgfau.unb.br/component/agenda/agendas
TITLE:

The impact of climate change on thermal performance of residential buildings in the Federal District in future scenarios.

KEY WORDS:

Global warming, BEM, thermal performance, climate adaptation.

PAGES: 197
BIG AREA: Ciências Sociais Aplicadas
AREA: Arquitetura e Urbanismo
SUMMARY:

We live in the context of climate change in which climatologists indicate that the increase in temperature will result in catastrophic consequences of extreme phenomena. In this context, the use of thermoenergetic simulations as auxiliary tools in the design process allow obtaining estimates of thermal comfort and energy consumption, which makes it possible to test improvement strategies even before construction, or in hypothetical and future scenarios. Therefore, this research aims to evaluate the impact of climate change on the thermal performance of residential buildings in future scenarios for the current climate, short-term future climate (2050) and long-term future climate (2090). Furthermore, different project variables were tested to understand which would be the most appropriate combinations for the climate scenarios evaluated in the climate context of the Federal District (DF). The aim is to compare temperatures in indoor environments considering the context of global warming and quantify the increase in the thermal load of residential buildings as a prediction and warning regarding the increase in energy consumption by air conditioning equipment. To this end, thermoenergetic modeling and simulation of a representative high-end residential building located in DF was developed using the thermal performance estimation methodology established by NBR 15575. For the simulations, the DesigBuider software (version 7.0.2.006) and future climate files (HadGEM2, regcm, RCP 8.5) were used considering the worst predictive scenario for Brasília. The simulations considered the natural ventilation condition and the artificial air conditioning condition. The results demonstrated that the percentage of hours within an operating temperature range considered acceptable (PHFT) will reduce significantly in the future. This indicator showed a drop of 51% for 2050 and 87% for 2090 in relation to the estimated value for the current climate. The predicted thermal load will be almost 5 times greater in 2050 and almost 8 times greater in 2090 when compared to the same indicator in the current climate for the study object in question. When testing different combinations of bioclimatic variables, it was identified that the most effective scenarios consider more efficient glass, smaller openings, use of shutters and external walls in ceramic blocks for ventilated models or more insulated walls for non-naturally ventilated models. The results of proposed models with the most appropriate design variables for each case generated a relevant increase in the PHFT in the current climate, reaching a value of 97.79% and indicating a high level of comfort without the use of air conditioning. In relation to future climate scenarios, it is considered that bioclimatic strategies were not sufficient to establish comfort even though they caused an increase in PHFT. In 2050 this criterion reached 49.94%, and in 2090 only 11.48%, which demonstrates the need to use active strategies to achieve comfort. In relation to thermal load, the proposed model proved to be very efficient and indicated reductions of 94% for the current climate, 56% for 2050 and 62% for 2090 in relation to the original models. Finally, the work brings a warning to civil construction to rethink the techniques and strategies currently implemented with a view to the well-being of residents in the long term.

COMMITTEE MEMBERS:
Externo à Instituição - MARCIO JOSÉ SORGATO - UTFPR
Presidente - 2658711 - CAIO FREDERICO E SILVA
Interna - 1438937 - JOARA CRONEMBERGER RIBEIRO SILVA
Interna - 1851456 - VANDA ALICE GARCIA ZANONI