Effectiveness of phase change materials for improving the resiliency of residential buildings to extreme thermal conditions

Amir Baniassadi, David J. Sailor, Harvey J. Bryan

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


When heat waves coincide with loss of access to air conditioning (e.g., due to power outages), the adverse impacts on well-being of occupants will be exacerbated. Hence, there is ongoing interest in using passive strategies to improve the resiliency of buildings under such conditions. One promising strategy is the use of conventional or latent thermal mass to passively mitigate overheating. As a result, Phase Change Materials (PCM), which are already promoted widely as a strategy to use solar energy for passive heating in buildings, may also be a useful strategy to avoid summertime overheating. To verify this, we used whole-building energy simulations to study the effectiveness of PCMs in improving the resiliency of buildings during extreme events. The results suggest a considerable dependence on the timing and duration of power/air conditioning loss episode, the melt temperature of the material, and the underlying climate. We used parametric runs to study the effect of melt temperature on PCM effectiveness to reduce energy consumption while simultaneously increasing the resiliency of buildings during power outages. The results suggest that under some conditions it is possible to optimize melt temperature for both energy efficiency and heat resiliency, while under other conditions, optimizing for one outcome adversely affects the other.

Original languageEnglish (US)
Pages (from-to)190-199
Number of pages10
JournalSolar Energy
StatePublished - Aug 2019


  • Building energy consumption
  • Heat wave
  • Overheating
  • Phase change material
  • Power outage
  • Resiliency

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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