Comparison of green roof plants and substrates based on simulated green roof thermal performance with measured material properties

Mingjie Zhao, Paulo Cesar Tabares-Velasco, Jelena Srebric, Sridhar Komameni

Research output: Contribution to conferencePaperpeer-review

4 Scopus citations

Abstract

Tins study explores effects of green roof materials on green roof thermal performance based on simulated heat transfer through a roof assembly. A case study for a commercial building with a green roof located in Chicago, IL compares heat fluxes and net radiation for different plant and substrate materials. The investigation included a total of 35 cases based on combinations of seven types of plants and five types of substrates used in extensive green roofs. The green roof performance during one week in July was simulated employing a validated green roof model. ANOVA statistical analyses provide direct comparison of simulated heat fluxes and net radition with different plant and substrate types. The results show that both plant and substrate types are statistically important to the total heat fluxes, while only plant types affect the simulated net radiation. The alteration effect of plant and substrate types is not statistically important. Specifically, the combination of a plant and a substrate with the highest albedo was chosen as the base case, and comparative analyses were conducted between the base case and other cases. The base case shows the best thermal performance in most simulated conditions. Therefore, in this case study it was sufficient to measure the thermal properties of selected green roof plants and substrates to determine the assembly with best expected thermal performance.

Original languageEnglish (US)
Pages817-823
Number of pages7
StatePublished - Nov 4 2013
Event13th Conference of the International Building Performance Simulation Association, BS 2013 - Chambery, France
Duration: Aug 26 2013Aug 28 2013

Other

Other13th Conference of the International Building Performance Simulation Association, BS 2013
CountryFrance
CityChambery
Period8/26/138/28/13

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Modeling and Simulation

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