Effect of window-to-wall-area ratio on thermal performance of building wall materials in Elazığ, Turkey

Abstract

In this study, the effect of glazing-to-total-wall-area ratio on the thermal performance of different wall materials is numerically investigated in terms of heat transmission load. The investigation was performed for a South-facing wall in Elazığ, Turkey. The heat transmission load through walls and windows are determined separately for summer and winter climate conditions. In this analysis, the frame area of the window is not considered. Therefore, whereas the glazing area on uninsulated and insulated walls is increased from 0% to 100%, the heat gain and losses are calculated separately according to the glazing type. The transmission loads through the wall are determined by an implicit finite difference procedure under steady periodic conditions. Concrete, briquettes, bricks, and autoclaved aerated concrete are selected as structure materials. Results show that in the uninsulated wall, the wall material affected the glazing area, whereas in the insulated wall, the effect of wall material on glazing area is insignificant.

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“…5), thus an increase in the wall area would result in an increase in solar gains into the building and then an increase in the energy demand for cooling. These results are consistent with the findings in Ozel and Ozel's [13] research in Turkey. In the research [13] it was observed that the glazing area of the AAC wall can be made larger for both summer and winter conditions when the wall was not insulated; while for the insulated wall, the wall material did not have any significant effect on the glazing area.…”

“…These results are consistent with the findings in Ozel and Ozel's [13] research in Turkey. In the research [13] it was observed that the glazing area of the AAC wall can be made larger for both summer and winter conditions when the wall was not insulated; while for the insulated wall, the wall material did not have any significant effect on the glazing area. However, these findings differ from the results in the research carried out by Sene et al in 2017.…”

“…The research revealed that increasing the window-to-wall ratio raises thermal discomfort but reduces the energy needed for lighting [12]. The reason for these marked differences in the results obtained by [12] and [13] is the difference in the methods used. Sene et al only focused on the impact of window-to-walls ratios of a single glazed IOP Publishing doi:10.1088/1755-1315/1054/1/012039 8 window and a single wall material on thermal comfort and energy consumption in the tropical zone.…”

“…Ozel and Ozel [13], researched two glazing types (single and double glazing) and four different wall materials (both insulated and uninsulated). The uninsulated wall was made up of a "2 cm outer plaster, 20 cm structure material, and 2 cm inner plaster".…”

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“…Windows and other similar installations enable the usage of sunlight to minimize artificial lighting and improve indoor aesthetics. Yet, solar radiation through windows is responsible for 40–70% of the cooling load in buildings …”