Thermal performance of a hollow block with/without insulating and reflective materials for roofing in Mexico

J. Xamán*, J. Cisneros-Carreño, I. Hernández-Pérez, I. Hernández-López, K. M. Aguilar-Castro, E. V. Macias-Melo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The thermal analysis of a hollow block with/without insulation and reflective materials for roofing was studied during 24 h (hottest and coldest days) considering environmental variables from a city in Mexico with hot weather. The traditional blocks used for roofs in Mexico with two and three hollows were considered. The different configurations of roof analyzed are: (C1) Reference or traditional block (hollow block + concrete slab), (C2) Traditional block with a reflective coating on the outer of the slab (hollow block + concrete slab + reflective coating), (C3) Traditional block with an insulating material between the outer surface of the block and the slab (block hollow + insulation + concrete slab) and (C4) Traditional block with a insulation material and a with a reflective coating on the outer surface of the slab (hollow block + insulation + concrete slab + reflective coating). The different coatings considered are: Gray, Black and White. The results show that the configuration C4 with a white reflective coating demand a lower thermal load for the block with two hollows (B2-Wins-RW) and three hollows (B3-Wins-RW) with a value of 1045.3 and 975.9 W h/m2, respectively. These values represent a decrease in the thermal load of 32.4 and 46.3% with respect to the traditional roof (C1). This result shows the advantage of using the combination of insulating material and reflective coating on roofs with hot climates.

Original languageEnglish
Pages (from-to)243-255
Number of pages13
JournalApplied Thermal Engineering
Volume123
DOIs
StatePublished - 1 Jan 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Hollow block
  • Reflective materials
  • Roofs
  • Thermal performance

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