Analysis of carbon emissions and energy consumption of nzeb buildings in the context of hot climates

Authors

DOI:

https://doi.org/10.46421/encacelacac.v18i1.7301

Keywords:

building zero-energy, envelope, life cycle assessment, CO2 concentration, Energy Consumption

Abstract

This study examines the global warming potential and life cycle associated with the carbon emissions of the envelopes of a net-zero energy building located in a warm climate. A simplified life cycle assessment calculation tool developed by the International Energy Agency, IEA/SHC Task 70, was applied as a method, covering the material production phase through to the end of the cycle. The results showed that steel and concrete account for the majority of embodied carbon, while this type of building could emit less than one-sixth of the carbon compared to a conventional office building.

 

Author Biographies

Lucas Júnior Ferreira, Universidade de Brasília

Architect and urbanist. Master in the Graduate Program of the Faculty of Architecture and Urbanism University of Brasilia (Brasília - DF, Brazil).

Claudia Naves David Amorim, Universidade de Brasília

Architect and urbanist. Lecturer in the Graduate Program of the Faculty of Architecture and Urbanism University of Brasilia (Brasília - DF, Brazil)

Joára Cronemberger Ribeiro Silva, Universidade de Brasília

Professor in the Graduate Program of the Faculty of Architecture and Urbanism University of Brasilia (Brasília - DF, Brazil).

Lucas Rossi Caldas, Universidade Federal do Rio de Janeiro

Civil engineer. Professor at the Faculty of Architecture and Urbanism -FAU UFRJ, in the Graduate Program in Architecture - PROARQ FAU, and in the Civil Engineering Program - PEC/COPPE/UFRJ. (Rio de Janeiro- RJ, Brazil).

References

AMORIM, Cláudia N. D., et. al. ZEB – Zero Energy Brasília: Plano estratégico de eficiência energética para parque construído de balanço energético nulo. Brasília, DF. 2020.

BENITE, A. Emissões de Carbono e a Construção Civil. Centro de Tecnologia de Edificações: São Paulo. 2011.

Concentração de carbono na atmosfera está 50% maior do que a pré-industrial. Udop, 2022. Disponível em: https://www.udop.com.br/noticia/2022/06/07/concentracao-de-carbono-na-atmosfera-esta-50-maior-do-que-a-pre industrial.html#:~:text=De%20acordo%20com%20a%20estimativa,ou%20acima%20de%20400%20pp. Acesso: 5 de jan. de 2025.

COSTA, João F. W., et. al. Retrofit guidelines towards the achievement of net zero energy building for office building in Brasilia. Brasil, BR. 2020.

EMPRESA DE PESQUISA ENERGÉTICA. Matriz energética e elétrica. Disponível em: https://www.epe.gov.br/pt/abcdenergia/matriz-energetica-e-eletrica. Acesso em: 18 fev. 2025.

GLOBALABC - GLOBAL ALLIANCE FOR BUILDINGS AND CONSTRUCTION. International Energy Agency and the United Nations Environment Programme (2021): 2021

HAXHO, Endrit. LCA – Lighting. 2024. Material de apoio da Subtaks D da Task 70.

INTERNATIONAL ENERGY AGENCY (IEA). Task 70 – Low Carbon, High Comfort Integrated Building Design. Disponível em: https://task70.iea-shc.org/about. Acesso em: 10 fev. 2025.

ANTUNES, Lucas Niehuns; GHISI, Enedir. Análise do ciclo de vida energético de edificações: atualização do estado da arte. ENCONTRO NACIONAL DE CONFORTO NO AMBIENTE CONSTRUÍDO (ENCAC), 2021. Florianópolis: UFSC, 2021.

COMITÉ EUROPÉEN DE NORMALISATION. EN 15804: Sustainability of construction works – Environmental product declarations – Core rules for the product category of construction products. Brussels: CEN, 2019.

Published

2025-08-16

How to Cite

RAMOS DA CUNHA, FABIOLA; FERREIRA, Lucas Júnior; AMORIM, Claudia Naves David; Silva Joára Cronemberger Ribeiro; CALDAS, Lucas Rossi. Analysis of carbon emissions and energy consumption of nzeb buildings in the context of hot climates. In: ENCONTRO NACIONAL DE CONFORTO NO AMBIENTE CONSTRUÍDO, 18., 2025. Anais [...]. [S. l.], 2025. DOI: 10.46421/encacelacac.v18i1.7301. Disponível em: https://eventos.antac.org.br/index.php/encac/article/view/7301. Acesso em: 3 may. 2026.

Issue

Section

5. Eficiência Energética