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Information Journal Paper

Title

Optimization of thermal performance of double skin faç ade box window type with natural ventilation in summer in Tehran

Pages

  155-174

Abstract

 Design of the faç ade in accordance with climatic conditions is crucial to improve its ventilation function and to increase energy savings. Double skin faç ade (DSF) is a popular type of faç ade in office buildings among designers. The naturally ventilated double skin faç ade (NVDSF) is notable in terms of its energy performance mechanism. The NVDSF functional mechanism is based on thermal performance and airflow in the cavity. Computational Fluid Dynamics (CFD) is used to improve the function of these faç ades. In this paper, the geometric features of NVDSF are examined to achieve the best flow simulation strategy to promote accuracy and fewer errors in results and obtain the optimal time for computer simulation calculations using FLUENT software and sensitivity analysis. Laboratory measurements of a NVDSF sample were used to verify the simulation results. The findings revealed that the results of the three-dimensional model are more accurate compared to the two-dimensional one, especially for predicting the temperature values of glass surfaces. Also, the Y+ parameter is the determinant parameter in choosing the mesh dimensions so that its value is about 1 for the first grid close to the walls. Determining the optimal scale of the three-dimensional model can reduce computation and design time. On the other hand, the cross section shape and the area of air inlets of NVDSF are effective parameters on faç ade’ s thermal performance. The results showed that increasing the width of the cavity can improve the thermal performance of the facade. Increasing the cross section of the inlet and outlet ventilation, and thus increasing the air flow in the cavity, does not necessarily lead to improving the thermal performance of the faç ade. Using low emission glass compared to ordinary glass, especially for the outer wall of the double skin faç ade, reduces the heat flux passing through the inner glass surface of Double skin facade into the building space by an average of 23. 1%. Finally, for the optimal design of Double skin facade, it is necessary to pay attention to all the variables affecting the facade performance and perform economic analysis to choose from the options with suitable thermal performance.

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    • Cite

    APA: Copy

    SADAT SIADATI, FARYAL, FAYAZ, RIMA, & NIKGHADAM, NILOOFAR. (2021). Optimization of thermal performance of double skin faç ade box window type with natural ventilation in summer in Tehran. JOURNAL OF ARCHITECTURE IN HOT AND DRY CLIMATE, 9(13 ), 155-174. SID. https://sid.ir/paper/956522/en

    Vancouver: Copy

    SADAT SIADATI FARYAL, FAYAZ RIMA, NIKGHADAM NILOOFAR. Optimization of thermal performance of double skin faç ade box window type with natural ventilation in summer in Tehran. JOURNAL OF ARCHITECTURE IN HOT AND DRY CLIMATE[Internet]. 2021;9(13 ):155-174. Available from: https://sid.ir/paper/956522/en

    IEEE: Copy

    FARYAL SADAT SIADATI, RIMA FAYAZ, and NILOOFAR NIKGHADAM, “Optimization of thermal performance of double skin faç ade box window type with natural ventilation in summer in Tehran,” JOURNAL OF ARCHITECTURE IN HOT AND DRY CLIMATE, vol. 9, no. 13 , pp. 155–174, 2021, [Online]. Available: https://sid.ir/paper/956522/en

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