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Urban wind : = Impact of building geometry on the wind energy yield potential above the rooftops of buildings.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Urban wind :/
Reminder of title:	Impact of building geometry on the wind energy yield potential above the rooftops of buildings.
Author:	Grayson, Malika.
Description:	1 online resource (211 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
Contained By:	Dissertation Abstracts International78-04B(E).
Subject:	Mechanical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369319378

Urban wind : = Impact of building geometry on the wind energy yield potential above the rooftops of buildings.
Grayson, Malika.

Urban wind :Impact of building geometry on the wind energy yield potential above the rooftops of buildings. - 1 online resource (211 pages)

Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

In increasing the energy available in urban areas, wind energy devices can be placed closer to where they are needed, thus decreasing external electricity demand and transmission costs. This dissertation examines the potential energy yield in the built environment. The primary objective is to show how the potential wind energy at the building rooftop can be increased by modifying and designing the building's structure to accelerate the wind. A crucial element in integrating wind as a source of energy in urban settings is finding ways to maximize wind speed and minimize turbulence intensity. Numerical simulations show that if the building's facade is changed, the flow dynamics at the rooftop can also change significantly leading to an increase in wind speed above the rooftop. To investigate this, a sloped facade building model, an elliptical facade building model, and a modified elliptical (rose facade building) model are compared to a rectangular building model. Both experiments and Computational Fluid Dynamics (CFD) are performed.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369319378Subjects--Topical Terms:

557493
Mechanical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Urban wind : = Impact of building geometry on the wind energy yield potential above the rooftops of buildings.
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504 $a Includes bibliographical references
520 $a In increasing the energy available in urban areas, wind energy devices can be placed closer to where they are needed, thus decreasing external electricity demand and transmission costs. This dissertation examines the potential energy yield in the built environment. The primary objective is to show how the potential wind energy at the building rooftop can be increased by modifying and designing the building's structure to accelerate the wind. A crucial element in integrating wind as a source of energy in urban settings is finding ways to maximize wind speed and minimize turbulence intensity. Numerical simulations show that if the building's facade is changed, the flow dynamics at the rooftop can also change significantly leading to an increase in wind speed above the rooftop. To investigate this, a sloped facade building model, an elliptical facade building model, and a modified elliptical (rose facade building) model are compared to a rectangular building model. Both experiments and Computational Fluid Dynamics (CFD) are performed.
520 $a The numerical simulation code, Fluent, was used to simulate a sloped facade building model at four angles, 20°, 30°, 45°, and 60° for comparison to a rectangular building model. The angle which performed the best, that angle being 30°, was used to experimentally investigate the flow around the sloped facade building and an elliptical facade building with the same angle. CFD is further used to modify the elliptical facade. Parameter correlations are performed to determine an improved building design that increases the available wind energy above the roof compared to the rectangular building model, while catering for the horizontal constraints present in the built environment.
520 $a To investigate the flow over these modified structures, experiments are performed in an open circuit tunnel where a boundary layer is physically modeled using roughness elements. Results from experimental comparisons of the modified facade structures compared to the rectangular building model show that the rose facade building model, which is designed to minimize the building footprint compared to the sloped and elliptical facade building models, is able to increase the velocity at varying roof locations by as much as 55%. This change in velocity increases the wind power density by over 150%. Thus, changing the building's geometry to influence both the wind and turbulence characteristics above the roof can result in more steady sites for wind harvesting devices leading to increased energy yield.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
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