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

Lukas Schwan; Madjid Madjidi; Thomas Auer

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

Lukas Schwan
, Madjid Madjidi
, Thomas Auer

Chair of Building Technology and Climate Responsive Design

Munich University of Applied Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-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 language	English
Title of host publication	PLEA 2018 - Smart and Healthy within the Two-Degree Limit
Subtitle of host publication	Proceedings of the 34th International Conference on Passive and Low Energy Architecture
Editors	Edward Ng, Square Fong, Chao Ren
Publisher	School of Architecture, The Chinese University of Hong Kong
Pages	917-918
Number of pages	2
ISBN (Electronic)	9789628272365
State	Published - 2018
Event	34th International Conference on Passive and Low Energy Architecture: Smart and Healthy Within the Two-Degree Limit, PLEA 2018 - Hong Kong, China Duration: 10 Dec 2018 → 12 Dec 2018

Publication series

Name	PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture
Volume	3

Conference

Conference	34th International Conference on Passive and Low Energy Architecture: Smart and Healthy Within the Two-Degree Limit, PLEA 2018
Country/Territory	China
City	Hong Kong
Period	10/12/18 → 12/12/18

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

CFD
Calculation methods
Natural ventilation
Solar chimney

Cite this

Schwan, L., Madjidi, M., & Auer, T. (2018). Calculation methods for the ventilation with solar chimneys: Comparison of analytical models, simulations and measurements. In E. Ng, S. Fong, & C. Ren (Eds.), PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture (pp. 917-918). (PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture; Vol. 3). School of Architecture, The Chinese University of Hong Kong.

Schwan, Lukas ; Madjidi, Madjid ; Auer, Thomas. / Calculation methods for the ventilation with solar chimneys : Comparison of analytical models, simulations and measurements. PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture. editor / Edward Ng ; Square Fong ; Chao Ren. School of Architecture, The Chinese University of Hong Kong, 2018. pp. 917-918 (PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture).

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

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.",

keywords = "CFD, Calculation methods, Natural ventilation, Solar chimney",

author = "Lukas Schwan and Madjid Madjidi and Thomas Auer",

note = "Publisher Copyright: {\textcopyright} Copyright: PLEA 2018 Hong Kong.; 34th International Conference on Passive and Low Energy Architecture: Smart and Healthy Within the Two-Degree Limit, PLEA 2018 ; Conference date: 10-12-2018 Through 12-12-2018",

year = "2018",

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series = "PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture",

publisher = "School of Architecture, The Chinese University of Hong Kong",

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Schwan, L, Madjidi, M & Auer, T 2018, Calculation methods for the ventilation with solar chimneys: Comparison of analytical models, simulations and measurements. in E Ng, S Fong & C Ren (eds), PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture. PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture, vol. 3, School of Architecture, The Chinese University of Hong Kong, pp. 917-918, 34th International Conference on Passive and Low Energy Architecture: Smart and Healthy Within the Two-Degree Limit, PLEA 2018, Hong Kong, China, 10/12/18.

Calculation methods for the ventilation with solar chimneys: Comparison of analytical models, simulations and measurements. / Schwan, Lukas; Madjidi, Madjid; Auer, Thomas.
PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture. ed. / Edward Ng; Square Fong; Chao Ren. School of Architecture, The Chinese University of Hong Kong, 2018. p. 917-918 (PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture; Vol. 3).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Calculation methods for the ventilation with solar chimneys

T2 - 34th International Conference on Passive and Low Energy Architecture: Smart and Healthy Within the Two-Degree Limit, PLEA 2018

AU - Schwan, Lukas

AU - Madjidi, Madjid

AU - Auer, Thomas

N1 - Publisher Copyright: © Copyright: PLEA 2018 Hong Kong.

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

KW - CFD

KW - Calculation methods

KW - Natural ventilation

KW - Solar chimney

UR - https://www.scopus.com/pages/publications/85086829047

M3 - Conference contribution

AN - SCOPUS:85086829047

T3 - PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture

SP - 917

EP - 918

BT - PLEA 2018 - Smart and Healthy within the Two-Degree Limit

A2 - Ng, Edward

A2 - Fong, Square

A2 - Ren, Chao

PB - School of Architecture, The Chinese University of Hong Kong

Y2 - 10 December 2018 through 12 December 2018

ER -

Schwan L, Madjidi M, Auer T. Calculation methods for the ventilation with solar chimneys: Comparison of analytical models, simulations and measurements. In Ng E, Fong S, Ren C, editors, PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture. School of Architecture, The Chinese University of Hong Kong. 2018. p. 917-918. (PLEA 2018 - Smart and Healthy within the Two-Degree Limit: Proceedings of the 34th International Conference on Passive and Low Energy Architecture).

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

Abstract

Publication series

Conference

UN SDGs

Keywords

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