Comparative Study of Various Thermal Analyses of Smart Windows in Cubic Building Design

Abstract

This paper presents a thermal analysis of compounds called smart windows in typical building design; such windows are covered with a vanadium dioxide film doped with tungsten and are characterized by their phase transition which makes the transmission coefficient high for low temperatures and low for high temperatures. This leads to the natural optimization of thermal comfort in summer and winter through a decrease in solar radiation transmission in the summer and an increase in it in the winter. A comparative study of four types of glass has been carried out both in summer and winter: simple glass SiO2, dioxide of vanadium un-doped glass, vanadium dioxide glass doped with 3% tungsten and 5% tungsten in order to evaluate their effect on the interior temperature of the building. For these reasons, a thermal model in the dynamic state has been developed to assess the thermal performance in such a building and to evaluate the effect of these windows on thermal comfort in terms of heat flow, density and internal temperature. The analysis was carried out having taken into account the external weather conditions of Fez, such as radiation, natural convection, air exchange, and the outdoor temperature as well as different parameters of the building envelope.

Review of Window Performance in A Hot and Humid Climate

“…Acoustic metamaterial windows were investigated in relation to ventilated tunables (Kumar et al, 2020). An investigation of thermal behaviour in hot and cold seasons did not report a specific smart window shape (El Khattabi et al, 2018). The authors of a study on basic window frames focused on the frame surface temperature (Nota et al, 2017), while a study of wood-aluminium window frames involved an investigation of the thermal properties related to the window-to-wall ratio (Misiopecki et al, 2018).…”

Precise Design of VO2Thin Films for Smart Windows by Employing Thickness‐Dependent Refractive Index

“…[9,27] Furthermore, many research reports have been published recently (and within past couple few years) which show the importance of this excellent optical material. [28][29][30][31][32] As explained, the transmission in smart windows coated with VO 2 can be controlled if the ambient temperature varies. The light transmission through such windows depends on the ambient and a critical temperature.…”

“…[ 9,27 ] Furthermore, many research reports have been published recently (and within past couple few years) which show the importance of this excellent optical material. [ 28–32 ]…”

Heat integration applied on low thermal energy system: Building complex case study

“…M. Jerman et al [7] have investigated thermal and hygric properties of several biomaterials potentially applicable as thermal insulation boards on the interior side of historical building envelopes. According to the work of El Khattabi et al [8] in which they studied and analyzed the smart windows in typical building design, the natural optimization of thermal comfort in winter and summer can be reached by using such windows composed by special materials. Characterized by their phase transition, the materials makes sure that the transmission coefficient is lower for high temperature and higher for low one.…”