Calculation methods for the ventilation with solar chimneys: Comparison of analytical models, simulations and measurements

Lukas Schwan, Madjid Madjidi, Thomas Auer

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The use of solar chimneys for natural ventilation could contribute to a reduction of the energy consumption of buildings. For the design process of solar chimneys, it is necessary to be able to predict the ventilation effectiveness precisely. In this paper, different analytical equations are compared to results from computational fluid dynamic simulations and experimental measurements. It was found that the investigated analytical methods neglect the occurrence of backflows which leads to an overestimation of the air flow for chimneys with a large depth. For an accurate result, detailed calculations with an adapted discharge coefficient are required to account for this effect.

Original languageEnglish
Title of host publicationPLEA 2018 - Smart and Healthy within the Two-Degree Limit
Subtitle of host publicationProceedings of the 34th International Conference on Passive and Low Energy Architecture
EditorsEdward Ng, Square Fong, Chao Ren
PublisherSchool of Architecture, The Chinese University of Hong Kong
Pages917-918
Number of pages2
ISBN (Electronic)9789628272365
StatePublished - 2018
Event34th International Conference on Passive and Low Energy Architecture: Smart and Healthy Within the Two-Degree Limit, PLEA 2018 - Hong Kong, China
Duration: 10 Dec 201812 Dec 2018

Publication series

NamePLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture
Volume3

Conference

Conference34th International Conference on Passive and Low Energy Architecture: Smart and Healthy Within the Two-Degree Limit, PLEA 2018
Country/TerritoryChina
CityHong Kong
Period10/12/1812/12/18

Keywords

  • CFD
  • Calculation methods
  • Natural ventilation
  • Solar chimney

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