Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian

A wind-catcher is a passive strategy to achieve thermal comfort in a building. It helps in the modification of indoor temperature by capturing and channeling outdoor wind flow into the interior space. The rate of fresh air that could be conveyed into a building is a key parameter that determines the...

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Main Author:	Rashtian, Babak
Format:	Thesis
Language:	English
Published:	2017
Subjects:	Building fittings and their installation
Online Access:	https://ir.uitm.edu.my/id/eprint/37309/1/37309.pdf
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id	my-uitm-ir.37309
record_format	uketd_dc
spelling	my-uitm-ir.373092023-08-09T07:27:02Z Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian 2017 Rashtian, Babak Building fittings and their installation A wind-catcher is a passive strategy to achieve thermal comfort in a building. It helps in the modification of indoor temperature by capturing and channeling outdoor wind flow into the interior space. The rate of fresh air that could be conveyed into a building is a key parameter that determines the performance of a wind-catcher. Fibonacci sequence is a recursive sequence, generated mathematically by adding two previous numbers in the sequence. Its sequence is rhythmic to the natural flow, and as such its application can result in the improvement of effectiveness of aerodynamic dependent products. Examples of contemporary applications are the design of fans, propellers, impellers, and aerators of PAX Scientific Company, established in United States (USA). This study examined how Fibonacci sequence is applied to improve the efficiency of a particular wind-catcher model. It focused on applying Fibonacci sequence principle to formulate the geometry of the louvres of the scoop of a windcatcher system. The study was driven by the same line of inquiry proposed by Jay Harman - "If fluids always tend to follow a particular path, is there a way to design equipment that takes advantage of this fact?" The dissertation began with a presentation on the background and current understanding of wind-catcher and Fibonacci sequencing principles. Computational Fluids Dynamics (CFD) simulation instrument was used to test and analyze the performance of one particular windcatcher model. The performance was measured based on the volumetric airflow where the proposed louvre pattern was compared to a conventional design. The results showed an improvement in the performance of the system by 11%. Further simulation runs were then performed to determine the optimum number of louvres to achieve maximum performance. The results revealed that the wind-catcher with two louvres is optimum. How these values impact the thermal comfort condition of the interior was later investigated using IES software. The results revealed that the increase of wind velocity contribute slightly towards the improvement of the thermal comfort performance of the whole system 2017 Thesis https://ir.uitm.edu.my/id/eprint/37309/ https://ir.uitm.edu.my/id/eprint/37309/1/37309.pdf text en public masters Universiti Teknologi Mara (UiTM) Faculty of Architecture, Planning & Surveying Ibrahim, Norhati
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Ibrahim, Norhati
topic	Building fittings and their installation
spellingShingle	Building fittings and their installation Rashtian, Babak Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian
description	A wind-catcher is a passive strategy to achieve thermal comfort in a building. It helps in the modification of indoor temperature by capturing and channeling outdoor wind flow into the interior space. The rate of fresh air that could be conveyed into a building is a key parameter that determines the performance of a wind-catcher. Fibonacci sequence is a recursive sequence, generated mathematically by adding two previous numbers in the sequence. Its sequence is rhythmic to the natural flow, and as such its application can result in the improvement of effectiveness of aerodynamic dependent products. Examples of contemporary applications are the design of fans, propellers, impellers, and aerators of PAX Scientific Company, established in United States (USA). This study examined how Fibonacci sequence is applied to improve the efficiency of a particular wind-catcher model. It focused on applying Fibonacci sequence principle to formulate the geometry of the louvres of the scoop of a windcatcher system. The study was driven by the same line of inquiry proposed by Jay Harman - "If fluids always tend to follow a particular path, is there a way to design equipment that takes advantage of this fact?" The dissertation began with a presentation on the background and current understanding of wind-catcher and Fibonacci sequencing principles. Computational Fluids Dynamics (CFD) simulation instrument was used to test and analyze the performance of one particular windcatcher model. The performance was measured based on the volumetric airflow where the proposed louvre pattern was compared to a conventional design. The results showed an improvement in the performance of the system by 11%. Further simulation runs were then performed to determine the optimum number of louvres to achieve maximum performance. The results revealed that the wind-catcher with two louvres is optimum. How these values impact the thermal comfort condition of the interior was later investigated using IES software. The results revealed that the increase of wind velocity contribute slightly towards the improvement of the thermal comfort performance of the whole system
format	Thesis
qualification_level	Master's degree
author	Rashtian, Babak
author_facet	Rashtian, Babak
author_sort	Rashtian, Babak
title	Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian
title_short	Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian
title_full	Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian
title_fullStr	Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian
title_full_unstemmed	Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian
title_sort	application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / babak rashtian
granting_institution	Universiti Teknologi Mara (UiTM)
granting_department	Faculty of Architecture, Planning & Surveying
publishDate	2017
url	https://ir.uitm.edu.my/id/eprint/37309/1/37309.pdf
_version_	1783734413105823744

Application of a fibonacci sequence-derived windcatcher scoop louvre geometry for natural ventilation improvement / Babak Rashtian

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