Using energy simulation and real-time data monitoring to investigate thermal performance of exterior cavity walls

Research output: Contribution to conferencePaper

3 Scopus citations

Abstract

Integrated cavity-wall systems are typically designed to shade the exterior of buildings. They can also eradicate daytime heat absorption by thermal convection. The combined heat loss through the natural nighttime sky radiation, the cavity wall shading effect, and the thermal convective loop results in a significantly improved building envelope performance. This paper outlines the design, construction, and monitoring of a south-facing cavity wall system integrated into a single-family residence in Southern Arizona. Implemented as a 'heat transfer regulator', the cavity wall functioned as a thermal break between the external and internal thermal forces through the south wall of the building envelope. The outside "Sol-air" surface temperatures of the cavity walls were found to be consistently lower than the standard non-cavity walls during extreme summer conditions. This was due to the combined effect of shading as well as stack-ventilation heat loss triggered by solar radiation received by the south cavity walls. Results from the field data monitoring and computer simulated results yielded a minimized operation of mechanical system, reduction in energy consumption, and optimized human thermal comfort.

Original languageEnglish (US)
Pages1211-1216
Number of pages6
StatePublished - Dec 1 2011
Event12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011 - Sydney, NSW, Australia
Duration: Nov 14 2011Nov 16 2011

Other

Other12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011
CountryAustralia
CitySydney, NSW
Period11/14/1111/16/11

ASJC Scopus subject areas

  • Computer Science Applications
  • Building and Construction
  • Architecture
  • Modeling and Simulation

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    Chalfoun, N. V. (2011). Using energy simulation and real-time data monitoring to investigate thermal performance of exterior cavity walls. 1211-1216. Paper presented at 12th Conference of International Building Performance Simulation Association Building Simulation 2011, BS 2011, Sydney, NSW, Australia.