Annual thermal evaluation of a ventilated roof under warm weather conditions of Mexico

T. Lima-Téllez, Y. Chávez, I. Hernández-López*, J. Xamán, I. Hernández-Pérez

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

An annual thermal evaluation of a ventilated roof (VR) for energy-saving purposes in two Mexican cities with warm weather is presented. It was developed a numerical code based on the global energy balance method to predict the thermal behavior of the VR. The code was verified, and it showed a good agreement with data reported in the literature. Weather data of the coldest and warmest days of each month for the two cities were provided to the numerical code as boundary conditions to perform the simulations. Thus, to quantify the benefits of using the VR, it was compared with a conventional roof (CR). The results showed that the implementation of VR significantly reduces the annual total heat gain by up to 50 and 60% for the climates BWh and Aw, respectively. In addition, it was found that for both climates the payback period of VR is smaller than a year and a half. In this way, VR is a passive technology with high potential to reduce the energy consumption for thermal comfort in buildings at a relatively low cost.

Original languageEnglish
Article number123412
JournalEnergy
Volume246
DOIs
StatePublished - 1 May 2022
Externally publishedYes

Bibliographical note

Funding Information:
T. Lima-Téllez acknowledges to the National Council of Science and Technology ( CONACYT ) for the grant awarded for her Master's Degree studies. The authors also acknowledge the support of the National Meteorological Service-National Commission of Water (SMN-CONAGUA) for providing the climate data of Hermosillo and Mérida to carry out the simulations. The authors acknowledge the support provided by Dr. Jesús Xamán during the time they worked together. They dedicate this work in his memory.

Funding Information:
T. Lima-T?llez acknowledges to the National Council of Science and Technology (CONACYT) for the grant awarded for her Master's Degree studies. The authors also acknowledge the support of the National Meteorological Service-National Commission of Water (SMN-CONAGUA) for providing the climate data of Hermosillo and M?rida to carry out the simulations. The authors acknowledge the support provided by Dr. Jes?s Xam?n during the time they worked together. They dedicate this work in his memory.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Double skin roof
  • Energy saving
  • Ventilated roof

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