Development and experimental validation of a simulation model for open joint ventilated façades

Sanjuan, Cristina; Súarez, María José; Blanco, Eduardo; Heras, María del Rosario

doi:10.1016/j.enbuild.2011.09.005

Cited by 41 publications

(27 citation statements)

References 20 publications

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“…Moisture in the building envelope can result in mould growth, deterioration of building materials, wood rot and so on. In literature, some simplified models for cavity ventilation can be found: for example, Künzel (2009), Ge andYe (2007) and Sanjuan et al (2011). In this article, the impact of some of these simplifications on the heat, air and moisture (HAM) transport in a cavity wall is investigated.…”

Section: Introductionmentioning

confidence: 99%

Heat, air and moisture transport modelling in ventilated cavity walls

Belleghem

Steeman

Janssens

et al. 2014

Journal of Building Physics

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To refer to or to cite this work, please use the citation to the published version:Van Belleghem M., Steeman M., Janssens A., De Paepe M. (2015) AbstractCavity walls are a widely used external wall type in north-western Europe with a good moisture tolerance in cool humid climates. In this work, a cavity wall configuration with a brick veneer outside leaf and a wood fibre board inside leaf is analysed with a newly developed coupled computational fluid dynamics-heat, air and moisture model. Drying of the outside or inside cavity leaf, both for summer and winter conditions was analysed. The new model was compared with a widely used simulation tool for building envelope analysis (WUFI®) that uses a simplified modelling approach for the convection in the cavity. The study showed that the simplified model overestimated the drying and moistening rates of the cavity wall compared to the detailed model. For both models the drying of the outer leaf was mainly determined by the outside conditions, and the outside leaf dried out mainly to the outside and not to the cavity. For the inside leaf, however the cavity ventilation was of major importance in drying. The study revealed that the simplified model could not be used to evaluate the drying potential of a ventilated cavity because it overestimated the ventilation effect systematically. The simplified model would in such case indicate lower moisture contents than in reality and consequently lower risk for mould growth, wood rot or other structural damage. Only detailed modelling of the convection in the cavity, as in the new model, leads to a correct evaluation of ventilated cavity walls.

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Section: Introductionmentioning

confidence: 99%

Heat, air and moisture transport modelling in ventilated cavity walls

Belleghem

Steeman

Janssens

et al. 2014

Journal of Building Physics

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“…For this reason, the use of advanced fluid measurements and simulation techniques are necessary. Accordingly the authors have tested different turbulence and radiation models available in the commercial computational fluid dynamic codes, on a three dimensional model, and the results have been compared to those of the PIV measurements [20]. The simulations have been carried out on a 3D model with the same geometry, materials and boundary conditions as the experimental unit of [19].…”

Section: Experimental Studiesmentioning

confidence: 99%

“…Sanjuan et al [21] also investigated the thermal and energy behaviour of the OJVFs. The model used was the one presented earlier in [20] and the investigation was carried out by 2D PIV techniques with laboratory measurements. The results gave a good description of the flow structures in the cavity.…”

Section: Experimental Studiesmentioning

confidence: 99%

Double skin facades (DSF) and building integrated photovoltaics (BIPV): A review of configurations and heat transfer characteristics

2016

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a b s t r a c tThis article presents the state of the knowledge on the thermal analysis of double skin facades with integrated photovoltaic (PV) panels called the Building Integrated Photovoltaics (BIPV) in terms of the published studies carried out on these systems. The idea of integration of the PV panels by replacing building elements, increase the prospects of the renewable energy systems. Taking also into account the need to use more renewable energy systems in buildings, the investigation of the BIPV systems to improve their performance is of a great importance. The literature studies are separated into experimental and theoretical for naturally ventilated systems and mechanically ventilated with external means e.g. fan use. It is concluded that most researchers studied the systems with mechanical ventilation rather than the systems with natural ventilation because the latter are more complex in terms of the air flow behaviour in the air duct. Additionally, various researchers proposed Nu number correlations and convective heat transfer correlation under several assumptions and conditions every time, for different range or Ra number which are presented and compared in this paper.

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“…There are many other applications where the obtainable energy contributions and the climatic conditions are strongly influenced by the thermal radiation exchange with the outdoor environment [13] [14], both in opaque [15] and transparent cases based on different analysis procedures [16][17][18][19][20]. Most of them attempt to employ this phenomenon to obtain a model which is as simple as possible; therefore, as concluded by Francés et.…”

Section: Introductionmentioning

confidence: 98%

Accuracy analysis of longwave sky radiation models in the MZELWE module of the ESP-r program

Čekon

2015

Energy and Buildings

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Development and experimental validation of a simulation model for open joint ventilated façades

Cited by 41 publications

References 20 publications

Heat, air and moisture transport modelling in ventilated cavity walls

Heat, air and moisture transport modelling in ventilated cavity walls

Double skin facades (DSF) and building integrated photovoltaics (BIPV): A review of configurations and heat transfer characteristics

Accuracy analysis of longwave sky radiation models in the MZELWE module of the ESP-r program

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