Ventilated Facades: Requirements and Specifications Across Europe

Bikas, Dimitrios; Tsikaloudaki, Katerina; Kontoleon, Karolos J.; Giarma, Christina; Τσόκα, Στέλλα; Tsirigoti, Dimitra

doi:10.1016/j.proenv.2017.03.096

Cited by 16 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An efficient design of these systems has to carefully consider functional and performance concerns, as well as aesthetic possibilities and architectural issues. In this regard, Bikas et al [31] made a state-of-the-art analysis of the legal, technical, social and financial requirements and specifications that ventilated façades should fulfil across Europe, underlining the feasibility of these systems.…”

Section: Introductionmentioning

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

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: Introductionmentioning

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

“…These varying configurations have led to a series of issues regarding their hydrothermal, energy, sound and fire performance. 10 Construction details (eg, cladding fixings) 8 or fire barriers 11,12 may also affect flame spreading within the ventilation air cavity.…”

Section: Ventilated Façade Systemmentioning

confidence: 99%

“…18 Although several authors have highlighted the effect of the façade's geometric characteristics on the externally venting flame development and propagation, 17,19,20 literature reports on VF systems focus mainly on investigating their behaviour in terms of energy consumption reduction 2,3,6 ; only recently, there has been an effort to document the respective fire safety regulatory requirements and specification of use across Europe. 10 In this context, a façade fire performance assessment approach highlighted F I G U R E 1 General sketch of the PF (left) and the VF (right) system. PF, Plain Façade; VF, Ventilated Façade [Colour figure can be viewed at wileyonlinelibrary.com] the need for further research on façade fire tests 21 ; the identified priority research issues are related to the effect of environmental factors, fuel type, measuring equipment, heat exposure, external fire scenarios, façade components and building techniques.…”

Section: Fire Risks Associated With Ventilated Façadesmentioning

confidence: 99%

Performance of a ventilated‐façade system under fire conditions: An experimental investigation

2020

View full text Add to dashboard Cite

Summary During a fire event, ventilated facade systems may contribute to external fire spreading to the upper floors of a building via the facade, thus representing a significant risk. In this frame, the performance of a typical ventilated façade system under fire conditions is experimentally investigated, using a full‐scale compartment‐facade test rig. Two alternative façade configurations are examined and comparatively assessed, namely a plain façade (PF) and a ventilated façade (VF) system. Emphasis is given on the estimation of the thermal characteristics of the developed Externally Venting Flames (EVF) and the thermal boundary conditions developing on the façade's exposed surface. An extensive set of sensors was installed at the interior of the fire compartment, the façade systems and the exterior of the test configurations. Analysis of the experimental data suggests that even though gaseous combustion products managed to penetrate the air cavity of the VF system, no consistent flaming conditions were established. On the unexposed face of both PF and VF systems, temperatures remained constantly below 180°C throughout the duration of both fire tests. The Eurocode correlations are assessed against the obtained experimental data; certain parameters, such as EVF length, width and centreline temperature, are found to be under‐estimated by the Eurocode methodology.

show abstract

“…The basic requirements for facade systems in the European Union, including in the context of their application to the modernization of existing buildings, they were presented in [1]. Requirements for hygrothermal, acoustic and fire resistance properties have been compared and commented.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the temperature distribution in the place of fixing the ventilated facade

Ujma

Pomada

2019

E3S Web Conf.

View full text Add to dashboard Cite

Designers more and more often choose facade systems with ventilated layers for external walls, especially in the case of new buildings. They are also used to modernize existing buildings. Mechanical connectors are a characteristic element of these constructions. Often, they are ignored in calculating the heat balance of rooms and the entire building. Because they pierce the thermal insulation layer they cause point thermal bridges. The influence of thermal point bridges, usually made of aluminum, i.e. a material with very high thermal conductivity, for heat transfer turns out to be significant. Such thermal bridges significantly increase heat losses through building partitions. This situation increases the heat demand in the rooms to compensate for the heat loss. The article presents the results of the analysis of the impact of mechanical fasteners in ventilated facade systems on heat transfer in the building envelope. The influence of various materials and constructional solutions on the thermal conditions in these walls was investigated.

show abstract

Ventilated Facades: Requirements and Specifications Across Europe

Cited by 16 publications

References 0 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

Performance of a ventilated‐façade system under fire conditions: An experimental investigation

Analysis of the temperature distribution in the place of fixing the ventilated facade

Contact Info

Product

Resources

About