Numerical assessment of natural air conditioning in building with double skin facade in hot arid climate

Document Type : Research


1 Ph.D. Candidate, Department of Civil Engineering, K.N. Toosi University of Technology, Tehran, Iran.

2 Assistant Professor, Department of Architectural Engineering, Payam-e-Noor University of Tehran, Tehran, Iran.

3 M. A. Student, Department of Architecture, Payam-e-Noor University of Tehran, Tehran, Iran.

4 Professor, Department of Hydraulic and Water Resources Engineering, K.N. Toosi University of Technology, Tehran, Iran.


These days, there is more need for natural air conditioning, which means there is more demand for air conditioning by open windows. Perhaps this is a reaction to the “Sick Building Syndrome” that is frequently used to describe irregular HVAC use. In the buildings, implementation of such mechanical systems to improvise a continuous comfort shows the lack of awareness and no consideration towards environmental issues including the enormous energy wastes. The results of all the conducted research conclude that the façades require a greater design in a way that is well equipped to encounter the elements including wind, rain, heat, and humidity. In this regard, Dual Skin Facades, which have recently become widespread in European architecture, provide the possibility of natural ventilation while regulating sound, wind, and rain. Heat, cold, light, wind, and outside noise may all be adjusted and compensated with Dual Skin Facades, allowing residents to be more comfortable without energy losses. The purpose of the following paper is to perform a numerical investigation of natural air conditioning in various Dual Skin Façade systems. The buildings under consideration are located in Iran's "Hot and Arid" climate in the city of Kerman, and they will benefit from natural air conditioning in the most months of the year. Also the parameters impacting the flow field, such as velocity and temperature in winter and summer, as well as throughout the day and night, were studied in this study for various opening sizes. The results of modeling showed that regarding the climatic conditions, the appropriate selection of the dual skin facade system, the air-gap width, the ventilation method, the location, and the dimensions of the openings, significantly made the buildings with dual skin facade unnecessary from mechanical heating and cooling facilities. And leads to energy saving. 


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