Experimental evaluation of the airflow behaviour in horizontal and vertical Open Joint Ventilated Facades using Stereo-PIV

Sánchez, M.N.; Giancola, Emanuela; Súarez, María José; Blanco, Eduardo; Heras, M.R.

doi:10.1016/j.renene.2017.03.082

Cited by 28 publications

(11 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To study the fluid dynamic performance of this model, different radiation conditions have been experimented, and without considering the wind effect [65]. The experimental data used to validate the CFD model correspond to the Ra = 1.0 × 10 9 case of study.…”

Section: Resultsmentioning

confidence: 99%

“…Before addressing the numerical model developed in this research, this section describes the assembly and equipment utilized in the experimental tests. A laboratory model of a ventilated façade has been designed to study the thermal and fluid-dynamic performance of this type of building elements in the function of the solar radiation conditions [65]. It has the same composition as real façades with three main layers: an outer opaque layer, an inner wall and an air cavity between them.…”

Section: Materials and Methods: Experimental Test Benchmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

et al. 2019

View full text Add to dashboard Cite

Commercial and residential building is one of the four major final energy consumption and end-use sectors. In this sector, cooling loads represent an important part of the energy consumption, and therefore, they must be minimized, improving the energy efficiency of buildings. Ventilated façades are one of the most widely used passive elements that are integrated into buildings, precisely with the aim of reducing these loads. This reduction is due to the airflow induced in the air cavity by the buoyancy forces, when the solar radiation heats the outer layer of the façade. In the open joint ventilated facades (OJVF), ventilation is attained through the open joints between the panels composing the outer layer. Despite the steadily growing research in the characterization of this type of system, few studies combine the numerical modelling of OJVF with experimental results for the assessment of the airflow in the ventilated cavities. This paper experimentally validates a numerical simulation model of an OJVF. Firstly, the façade performance has been experimentally assessed in a laboratory model determining the temperatures in the panels and air gap and measuring the flow field at the gap using particle image velocimetry (PIV) techniques. Secondly, a numerical model has been developed using advanced Computational Fluid Dynamics (CFD) simulation tools. Finally, an experimental validation of the numerical model has been done. Experimental and numerical results are compared in different planes inside the ventilated cavity. The discrete ordinates (DO) radiation model and the k-ε renormalisation group (RNG) turbulence model better adjust the simulated results to the experimental ones.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Materials and Methods: Experimental Test Benchmentioning

confidence: 99%

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

et al. 2019

View full text Add to dashboard Cite

show abstract

“…En términos de antecedentes a nivel académico, diversos estudios han abordado la temática, con diferentes metodologías de estudio que al mismo tiempo pueden combinarse entre sí. La gran mayoría de los trabajos se realizan a través de simulaciones computacionales dinámicas (Balocco, 2002;Balocco, 2004;Patania, Gagliano, Nocera, Ferlito y Galesi, 2010;San Juan, Suárez, González, Pistono y Blanco, 2011;Suárez y Molina, 2015;Peci López y Ruiz de Adana Santiago, 2015, Gagliano, Nocera y Aneli, 2016, aunque en algunos casos se han creado prototipos experimentales (Sandberg y Moshfegh, 1996;Peci López, Jensen, Heiselberg y Ruiz de Adana Santiago, 2012;Sánchez, Giacola, Suárez, Blanco y Heras, 2017) y en otros se ha trabajado mediante el monitoreo de edificios reales en uso (Stazi, Tomassoni, Veglio y Di Perna, 2011;Aparicio Fernández, Vivanco, Ferrer Gisbert y Royo Pastor, 2014;Gregorio Atem, 2016). Los resultados del desempeño térmico del sistema en estudio en el período estival muestran reducciones del orden del 58% de la carga térmica obtenida al usar una fachada ventilada en comparación a una fachada sin ventilación (Fantucci, Marinosci, Serra y Carbonaro, 2017), así como importantes disminuciones de consumos de energía para climatización, con tasas de ahorro de energía para enfriamiento pasivo entre el 35% y el 80% (Domínguez Delgado et al, 2013).…”

Section: Introductionunclassified

Mejoras en el desempeño energético de edificios en verano mediante la integración de envolventes ventiladas en fachadas norte y cubiertas. El caso de Mendoza, Argentina

Balter

Ganem

Barea

2020

View full text Add to dashboard Cite

The proposal of energy efficiency measures in the residential sector in Argentina requires analyzing the architectonic possibilities of building rehabilitation using technologies that reduce energy consumption, that are feasible to implement locally. In regions with high solar radiation levels, as is the case of the city of Mendoza, heat fluxes transmitted inside can be reduced by the natural ventilation of the layers in the envelope, both on facades and roofs, thus obtaining significant savings in consumption for cooling purposes. This work evaluates the potential for improvement with the integration of ventilated envelopes. The work methodology is structured in two stages: i) survey of residential buildings by morphological typology and analysis of rehabilitation possibilities with ventilated facades, considering the exposed envelope surfaces by orientation; ii) simulation of a case study - previously validated with onsite measurements - using the EnergyPlus software. On integrating ventilated facades and roofs important energy savings of around 32% were achieved, considering the building without users (unoccupied). In the case of units on the top floor, with roofs exposed to the outside, energy savings of 260% were recorded.

show abstract

“…The local climate, the specific design, the physical characteristics of the construction (inlet/outlet locations, cavity thickness, material properties, air source), the use and desired comfort of the building, as well as the cost of primary energy and CO2 emission should all be taken into account. In order to study the OVF, the studies vary according to the methodology adopted: thermofluid-dynamic analyses, (Patania et al, 2010;Domínguez Delgado et al, 2013;Suárez et al, 2015) number simulations, (Balocco, 2002;2004) and, in some cases, experimental models have been created (Sandberg & Moshfegh, 1996;Peci López et al, 2012;Sánchez et al, 2017). There are few analyses of real cases in actual operation (Stazi et al, 2011;.…”

Section: Introductionmentioning

confidence: 99%

Air cavity performance in Opaque Ventilated Façades in accordance with the Spanish Technical Building Code

Balter¹,

Pardal²,

Ansuátegui³

et al. 2019

ACE: Architecture, City and Environment

View full text Add to dashboard Cite

The use and study of Opaque Ventilated Façades (OVF) has considerably expanded in recent years as an efficient envelope option when hoping to reduce cooling thermal loads for buildings. This is due to the solar protection provided by the outer layer and the ventilation from the air cavity. However, the actual situation in the air cavity of OVF buildings is usually very different from the theoretical studies, which do not consider the fixing systems of the outer layer regularly arranged inside the air cavity. This information is crucial to understand and validate predictions of the efficient behaviour of the system. Therefore, the objective of this work is to classify and analyse the performance of the air chamber in OVF existing buildings in Barcelona in accordance with current building regulations. Methodology Twenty-one buildings were surveyed and classified and the air movement and temperature inside the cavity was measured in ten buildings. Conclusions The findings show that although the Technical Building Code of Spain regulates the air cavity ventilation according opening minimums per linear meter, air inlet and outlet openings have the greatest influence on air cavity ventilation, even more so than open joint surface of the outer

show abstract

Experimental evaluation of the airflow behaviour in horizontal and vertical Open Joint Ventilated Facades using Stereo-PIV

Cited by 28 publications

References 52 publications

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

Experimental Validation of a Numerical Model of a Ventilated Façade with Horizontal and Vertical Open Joints

Mejoras en el desempeño energético de edificios en verano mediante la integración de envolventes ventiladas en fachadas norte y cubiertas. El caso de Mendoza, Argentina

Air cavity performance in Opaque Ventilated Façades in accordance with the Spanish Technical Building Code

Contact Info

Product

Resources

About