Analysis of ventilation effects and the thermal behaviour of multifunctional façade elements with 3D CFD models

Brandl, Daniel; Mach, Thomas; Grobbauer, Michael; Hochenauer, Christoph

doi:10.1016/j.enbuild.2014.09.036

Cited by 31 publications

(15 citation statements)

References 29 publications

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“…ANSYS FLUENT provides several turbulence and radiation models for solving problems involving turbulent flows and radiation. RNG k-ɛ model was selected as the turbulence model since it is applicable for a wider class of flows than the standard k-ɛ model [34,36]. The discrete ordinates (DO) model was applied as the radiation model due to its ability in solving most radiation problems.…”

Section: Simulation Processmentioning

confidence: 99%

Heat transfer analysis of an integrated double skin façade and phase change material blind system

Darkwa

Kokogiannakis

2017

Building and Environment

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Section: Simulation Processmentioning

confidence: 99%

Heat transfer analysis of an integrated double skin façade and phase change material blind system

Darkwa

Kokogiannakis

2017

Building and Environment

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“…However, for the study of ventilated façades, single-region simulations dominate, making the applied boundary conditions the critical factor [9]. One of the few exceptions is the study of Brandl et al [12], which considered multiple solid regions in the simulation. However, in this case, several material parameters (e.g.…”

Section: Introductionmentioning

confidence: 99%

A Fast Calibrated CFD Model for Timber-Concrete Composite Ventilated Façades

Pastori,

Salehi,

Radl

et al. 2024

Preprint

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Timber-concrete composite (TCC) systems join the positive aspects of engineered wood products (good seismic behaviour, low thermal conductivity, environmental sustainability, good behaviour under fire if appropriately designed) with those of concrete (high thermal inertia, durability, excellent fire resistance). TCC facades are typically composed by an internal insulated timber-frame wall and an external concrete slab, separated by a ventilated air cavity. However, there is very limited knowledge concerning the performance of TCC facades, especially for what concerns their thermal behaviour. The present paper deals with the development and optimisation of a 2D CFD model for the analysis of TCC ventilated façades thermal behaviour. The model is calibrated and validated against the experimental data collected during the annual monitoring of a real TCC ventilated envelope in the north of Italy. Also, a new solver algorithm is developed to significantly speed up the simulation. The final model can be used for the time-efficient analysis and optimisation of the thermal performance of TCC ventilated facades, as well as other ventilated facades with external massive cladding, avoiding the expensive and time-consuming construction of mock-ups, or the use of comparably slow (conventional) CFD solvers that are less suitable for optimization studies.

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“…In recent years, there has been a growing interest about the functionalization of building envelopes in order to reduce its energy consumption. This interest has strengthened the desire to use the building facade for the local production of electricity or the accumulation of thermal energy [3].…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Use of Venetian Blinds as Solar Thermal Collectors in Double Skin Facades in Mediterranean Climates

et al. 2017

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Abstract:The global trend on energy integration and building efficiency is making both researchers and building developers look for technical solutions to use facade surfaces for energy harvesting. In this work, the assessment of the thermal performance of a double-skin facade (DSF) with a venetian blind-type of structure used as a solar thermal collector by means of computational fluid dynamics (CFD) is presented. A Venetian blind collector would allow for heat rejection/energy harvesting and exterior views simultaneously and can be easily integrated into the DSF aesthetical design. For the purposes of this study, the modeled facades (south, west, and east-oriented) were set to be located in Barcelona (Spain), where large solar gains are a constant condition throughout the year, and such large semi-transparent envelopes lead to interior over-heating in buildings, even during the winter. For the studied facades, both the reductions in radiative heat gains entering the building and the heat recovery in the Venetian blind collector were evaluated for a yearlong operation.

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Analysis of ventilation effects and the thermal behaviour of multifunctional façade elements with 3D CFD models

Cited by 31 publications

References 29 publications

Heat transfer analysis of an integrated double skin façade and phase change material blind system

Heat transfer analysis of an integrated double skin façade and phase change material blind system

A Fast Calibrated CFD Model for Timber-Concrete Composite Ventilated Façades

Assessment of the Use of Venetian Blinds as Solar Thermal Collectors in Double Skin Facades in Mediterranean Climates

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