Analytical model of semi-transparent photovoltaic double-skin façade system (STPV-DSF) for natural and forced ventilation modes

Heat conduction in anisotropic materials is quite different from that in isotropic materials. Heat flux vector is commonly not perpendicular to the isothermal surface in anisotropic materials. The advantage and disadvantage of anisotropic materials were analyzed in this paper. The thermal conductivities at one point are not equal in all directions for anisotropic materials. The technique of double skin facade has been successfully applied in many building designs. The application of combining building envelope of anisotropic materials and double skin facade was proposed to avoid its disadvantage. Basing on the combination of anisotropic materials and double skin facade in building envelope, the indoor cooling and heating load decrease in summer and winter respectively. Especially in summer, the effect of energy saving is obvious since the partial magnitude of conductive heat in the envelope made of anisotropic materials could be brought out from the cavity of double skin facade by natural or forced ventilation through it.

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Technical Characteristics and Energy Performance of Double Skin Faces: A Review

E3S Web of Conferences ◽

10.1051/e3sconf/202124801029 ◽

2021 ◽

Vol 248 ◽

pp. 01029

Author(s):

Cui Xu ◽

Qiao Xi ◽

Qingsong Ma

Keyword(s):

Energy Saving ◽

Engineering Application ◽

Energy Performance ◽

Economic Benefits ◽

Curtain Wall ◽

Industry Standards ◽

Ventilation Modes ◽

Double Skin ◽

Saving Effect ◽

Heat Preservation

Double Skin Facades (DSFs) have the advantages of heat preservation, heat insulation, noise reduction and energy saving. Therefore, DSFs are gradually developing into a new direction of environmental protection and energy saving of the curtain wall. This article mainly introduces the technical characteristics of DSFs from two aspects: the geometric structures of the hot aisles and the ventilation modes. And this article systematically reviews more than twenty articles which have dealt with the energy performances: thermal performances and ventilation performances. The paper finishes with some conclusions: The unique structure of DSFs makes DSFs outstanding in terms of energy saving, ventilation. However, DSFs also have some shortcomings: the initial investment and maintenance costs are relatively high, the fire protection design is relatively difficult, and the industry lacks industry standards. Therefore, it is necessary to estimate the overall energy-saving effect in advance, continue to in-depth optimization research on the engineering application value of DSFs, and ultimately bring good social and economic benefits.

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Experimental Study on Airflow and Temperature Predicting in a Double Skin Façade in Hot and Cold Seasons in Romania

Applied Sciences ◽

10.3390/app112412139 ◽

2021 ◽

Vol 11 (24) ◽

pp. 12139

Author(s):

Monica Lilioara Cherecheș ◽

Nelu Cristian Cherecheș ◽

Adrian Alexandru Ciobanu ◽

Sebastian Valeriu Hudișteanu ◽

Emilian Florin Țurcanu ◽

...

Keyword(s):

Renewable Energy Sources ◽

Building Design ◽

Cold Season ◽

Climatic Conditions ◽

Mechanically Ventilated ◽

Heating Efficiency ◽

Ventilation Modes ◽

Measurement Methodology ◽

Double Skin ◽

And Performance

In the context of energy conservation and sustainable development, building design should take into account the energy efficiency criteria by using renewable energy sources. Double-skin facades (DSF) represent innovative energy-efficient techniques that have gained increasing interest worldwide. The present study reports the results of an experimental campaign performed on a full-scale double-skin façade using the in-situ measurement methodology. The thermodynamic behavior of the façade is studied under real exterior climatic conditions in Romania in hot and cold seasons, and performance indicators in terms of pre-heating efficiency and dynamic insulation efficiency were determined. Three summer periods are analyzed corresponding to the outdoor air curtain scenario for three ventilation modes in naturally or mechanically ventilated single-story DSF. Results revealed that the third ventilation scenario, which combines horizontal and vertical openings, gives the best efficiency of 71.3% in the double skin façade functioning. During the cold season, the channel façade behaved like a thermal buffer between the building and the exterior air, ensuring the thermal energy for partial or integral heating of the building.

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