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Development and Application of a Num...

Kruis, Nathanael J. F.

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Development and Application of a Numerical Framework for Improving Building Foundation Heat Transfer Calculations.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Development and Application of a Numerical Framework for Improving Building Foundation Heat Transfer Calculations./
Author:	Kruis, Nathanael J. F.
Description:	215 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-10(E), Section: B.
Contained By:	Dissertation Abstracts International76-10B(E).
Subject:	Architectural engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3704744
ISBN:	9781321773422

Development and Application of a Numerical Framework for Improving Building Foundation Heat Transfer Calculations.
Kruis, Nathanael J. F.

Development and Application of a Numerical Framework for Improving Building Foundation Heat Transfer Calculations. - 215 p.

Source: Dissertation Abstracts International, Volume: 76-10(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2015.

Heat transfer from building foundations varies significantly in all three spatial dimensions and has important dynamic effects at all timescales, from one hour to several years. With the additional consideration of moisture transport, ground freezing, evapotranspiration, and other physical phenomena, the estimation of foundation heat transfer becomes increasingly sophisticated and computationally intensive to the point where accuracy must be compromised for reasonable computation time. The tools currently available to calculate foundation heat transfer are often either too limited in their capabilities to draw meaningful conclusions or too sophisticated to use in common practices.

ISBN: 9781321773422Subjects--Topical Terms:

3174102
Architectural engineering.

Development and Application of a Numerical Framework for Improving Building Foundation Heat Transfer Calculations.
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020 $a 9781321773422
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100 1 $a Kruis, Nathanael J. F. $3 3178846
245 1 0 $a Development and Application of a Numerical Framework for Improving Building Foundation Heat Transfer Calculations.
300 $a 215 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-10(E), Section: B.
500 $a Adviser: Moncef Krarti.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2015.
520 $a Heat transfer from building foundations varies significantly in all three spatial dimensions and has important dynamic effects at all timescales, from one hour to several years. With the additional consideration of moisture transport, ground freezing, evapotranspiration, and other physical phenomena, the estimation of foundation heat transfer becomes increasingly sophisticated and computationally intensive to the point where accuracy must be compromised for reasonable computation time. The tools currently available to calculate foundation heat transfer are often either too limited in their capabilities to draw meaningful conclusions or too sophisticated to use in common practices.
520 $a This work presents Kiva, a new foundation heat transfer computational framework. Kiva provides a flexible environment for testing different numerical schemes, initialization methods, spatial and temporal discretizations, and geometric approximations. Comparisons within this framework provide insight into the balance of computation speed and accuracy relative to highly detailed reference solutions.
520 $a The accuracy and computational performance of six finite difference numerical schemes are verified against established IEA BESTEST test cases for slab-on-grade heat conduction. Of the schemes tested, the Alternating Direction Implicit (ADI) scheme demonstrates the best balance between accuracy, performance, and numerical stability.
520 $a Kiva features four approaches of initializing soil temperatures for an annual simulation. A new accelerated initialization approach is shown to significantly reduce the required years of presimulation.
520 $a Methods of approximating three-dimensional heat transfer within a representative two-dimensional context further improve computational performance. A new approximation called the boundary layer adjustment method is shown to improve accuracy over other established methods with a negligible increase in computation time. This method accounts for the reduced heat transfer from concave foundation shapes, which has not been adequately addressed to date. Within the Kiva framework, three-dimensional heat transfer that can require several days to simulate is approximated in two-dimensions in a matter of seconds while maintaining a mean absolute deviation within 3%.
590 $a School code: 0051.
650 4 $a Architectural engineering. $3 3174102
650 4 $a Mechanical engineering. $3 649730
650 4 $a Energy. $3 876794
690 $a 0462
690 $a 0548
690 $a 0791
710 2 $a University of Colorado at Boulder. $b Civil Engineering. $3 1021890
773 0 $t Dissertation Abstracts International $g 76-10B(E).
790 $a 0051
791 $a Ph.D.
792 $a 2015
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3704744