Climate-based Performance Evaluation of Double Skin Facades by Building Energy Modelling in Central Europe

Double skin façades are façade technologies that have the perspective of reducing energy use and improving comfort in buildings due to their adaptable nature. Exhaust-air façades offer the possibility to utilize solar energy by recovering heat from the façade cavity. However, the cavity overheating can be detrimental on the summer performance. Predicting performance and optimizing the system during the design phase is a challenge, especially when the cavity-air is integrated into the HVAC system. Whole-building energy simulation (BES) software tools are an adequate tool for calculating whole building performance, although these can have limitations in the accurate replication of complex building elements. The paper analyses the available and applied modelling approaches within a BES tool, and compares the outputs in terms of cavity temperature, horizontal and vertical temperature profiles, and heat flux through the façade. The sensitivity of the results on the modelling approach is evaluated. Results can serve as a guide for practitioners on the selection of the modelling approach for a given task.

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Aerodynamic shape optimization of rectangular and elliptical double-skin façades to mitigate wind-induced effects on tall buildings

Journal of Wind Engineering and Industrial Aerodynamics ◽

10.1016/j.jweia.2021.104586 ◽

2021 ◽

Vol 213 ◽

pp. 104586 ◽

Cited By ~ 1

Author(s):

Mohammad Jafari ◽

Alice Alipour

Keyword(s):

Shape Optimization ◽

Tall Buildings ◽

Aerodynamic Shape Optimization ◽

Aerodynamic Shape ◽

Double Skin ◽

Double Skin Facades

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Predicting airflow in naturally ventilated double-skin facades: Theoretical analysis and modelling

Renewable Energy ◽

10.1016/j.renene.2021.07.135 ◽

2021 ◽

Author(s):

Yao Tao ◽

Xiang Fang ◽

Michael Yit Lin Chew ◽

Lihai Zhang ◽

Jiyuan Tu ◽

...

Keyword(s):

Theoretical Analysis ◽

Double Skin ◽

Double Skin Facades

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The Role of Wind on Double Skin Facades in High Rise Office Building

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.787.711 ◽

2013 ◽

Vol 787 ◽

pp. 711-716

Author(s):

Daryanto ◽

Eko Budihardjo ◽

Wahyu Setyabudi ◽

Gagoek Hardiman

Keyword(s):

Energy Conservation ◽

Building Envelope ◽

Office Buildings ◽

Thermal Discomfort ◽

High Rise ◽

Double Skin ◽

The Subject ◽

Air Conditioning Systems ◽

Double Skin Facades

There was an indication that high rise buildings in Jakarta was not designed based on energy conservation principles. The most important aspects of the high-rise buildings is energy saving technology located in the building envelope design. Building envelope with a full glass design functions for widening view and enhancing natural lights, even though but it is also increasing energy consumption and thermal discomfort due to the intensity of solar radiation in hot humid climates. During the current decade, the development of double building envelope type (Double Skin Façade: DSF) seemed more just to improve the aesthetics and the use of natural light, while the wind and thermal performance aspects were still lack of serious consideration. Those aspects will be chosen as the subject matter in this research. The research was aimed to investigate and compare the value of heat transfer in the building envelope of high-rise office buildings. Samples were taken from five DSF buildings, with closed and open cavity. CFD software is used for simulation of the five different models of DSF. The research proves that the high-rise office buildings as the research object in Jakarta do not apply energy conservation principle. The utilization of wind in the DSF cavity can reduce temperature and relieve the burden of air conditioning systems that is energy save. An important finding of the research is the need for ventilation in the design of a double skin at high-rise office buildings in the humid tropics.

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Study on the Influence of Mounting Dimensions of PV Array on Module Temperature in Open-Joint Photovoltaic Ventilated Double-Skin Façades

Sustainability ◽

10.3390/su13095027 ◽

2021 ◽

Vol 13 (9) ◽

pp. 5027

Author(s):

Wenjie Zhang ◽

Tongdan Gong ◽

Shengbing Ma ◽

Jianwei Zhou ◽

Yingbo Zhao

Keyword(s):

Heat Dissipation ◽

Temperature Drop ◽

Vertical Direction ◽

Wind Pressure ◽

Pv Array ◽

Pv Module ◽

Pv Modules ◽

Double Skin ◽

Open Joint ◽

Double Skin Facades

In building integrated photovoltaics (PV), it is important to solve the heat dissipation problem of PV modules. In this paper, the computational fluid dynamics (CFD) method is used to simulate the flow field around the open-joint photovoltaic ventilated double-skin façades (OJ-PV-DSF) to study the influence of the mounting dimensions (MD) of a PV array on the module temperature. The typical summer afternoon meteorological parameters, such as the total radiation (715.4 W/m2), the outdoor temperature (33.1 °C), and the wind speed (2.0 m/s), etc., are taken as input parameters. With the DO (discrete ordinates) model and the RNG (renormalization-group) k − ε model, a steady state calculation is carried out to simulate the flow of air in and around the cavity under the coupling of hot pressure and wind pressure, thereby obtaining the temperature distribution of the PV array and the wall. In addition, the simulation results are compared with the onsite experimental data and thermal imaging to verify the accuracy of the CFD model. Then three MD of the open joints are discussed. The results show that when the a value (represents the distance between PV modules and wall) changes from 0.05 to 0.15, the temperature drop of the PV module is the most obvious, reaching 2.0 K. When the b value (representing the distance between two adjacent PV modules in the vertical direction) changes from 0 to 0.1, the temperature drop of the PV module is most obvious, reaching 1 K. When the c value (represents the distance between two adjacent PV modules in the horizontal direction) changes from 0 to 0.1, the temperature of the PV module is lowered by 0.8 K. Thus, a = 0.1–0.15, b = 0.1 and c = 0.1 are recommended for engineering applications to effectively reduce the module temperature.

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Double-Skin Façades: Boundary Conditions, Challenging Examples and Developments

ce/papers ◽

10.1002/cepa.914 ◽

2018 ◽

Vol 2 (5-6) ◽

pp. 103-112

Author(s):

Fabian Schmid ◽

Xenia Cseh ◽

Emil Rohrer ◽

Martien Teich

Keyword(s):

Boundary Conditions ◽

Double Skin ◽

Double Skin Facades

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