Author ORCID Identifier

https://orcid.org/0000-0002-4072-4615

Document Type

Conference Paper

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

2. ENGINEERING AND TECHNOLOGY, Municipal and structural engineering, Thermodynamics

Publication Details

CERI 2020 Conference; ENERGY 2 - THERMAL PERFORMANCE OF BUILDINGS 1

Abstract

This work describes the use of conjugate computational fluid dynamics (C-CFD) to simulate controlled laboratory based dynamic heat transfer tests on building components. This study proposes that conjugate CFD simulation can be used to evaluate the influence of combined convective and conductive heat transfer in multi-state building components. To this end, a solid wall and cavity wall were tested with a Calibrated Hotbox and subject to variable temperature conditions leading to combined convective and conductive heat transfer. The varying temperature of the heat source was monitored and used as the input boundary condition in the simulation model, which included a computational domain which encompassed the hot-side air chamber and the wall, including cavity when applicable. It was found acceptable accuracy could be realized with a simplified constant surface heat transfer coefficient with fixed air temperature on the cold air side, which greatly reduced computational effort. The experimental results revealed that the cavity wall experienced a phase lag, peak displacement of 2.9 times higher and decrement factor 1.6 times lower compared with that of the solid wall.

DOI

https://doi.org/10.21427/atmk-7609

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