The impact of cultural assumptions on simulated energy, comfort, and investment returns of design decisions in two desert climates

Esteban Estrella Guillén, Holly Samuelson, Christine Vöhringer

Research output: Contribution to journalArticlepeer-review

Abstract

In Latin America, default assumptions and borrowed templates and methodologies are often used in energy modeling, resulting in models that might not represent their cultural context and leading to policies awkwardly fit to local practices. Policy-driving low-income housing studies in Mexico, for example, activated both heating and cooling in energy models even though less than 5% of the homes in the country have heating systems. This paper illustrates the importance of modeling local sociocultural habits and practices, and how this can affect design outcomes. Here, we modeled low-income housing representative of typical residences in two desert climates—Hermosillo, Mexico, and Copiapo, Chile—using EnergyPlus. Settings representing local practices in each region were tested against default values, including occupancy settings, regional construction systems, and importantly, HVAC settings related to partial conditioning. Their impacts were measured via variation in energy use, comfort conditions, and the payback period of design upgrades. Results demonstrated how certain assumptions can have a high “design significance”, a term we propose for inputs that completely change optimal design decisions, as well as the importance of considering thermal comfort in such decisions. Including partial conditioning, for example, resulted in at least double the payback period and discomfort degrees for design upgrades in 16 of 24 instances.

Original languageEnglish
Pages (from-to)931-944
Number of pages14
JournalBuilding Simulation
Volume14
Issue number4
DOIs
Publication statusPublished - Aug 2021

Bibliographical note

Funding Information:
This study was partially funded by the Harvard Climate Change Solutions Fund. The majority of Esteban Estrella Guillén’s work was performed during a paid research position at Harvard GSD, his current affiliation is listed in the title page.

Funding Information:
This study was partially funded by the Harvard Climate Change Solutions Fund. The majority of Esteban Estrella Guill?n?s work was performed during a paid research position at Harvard GSD, his current affiliation is listed in the title page.

Publisher Copyright:
© 2020, Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature.

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Energy (miscellaneous)

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