Selecting the Best Windows for the Building

explanatory Essay
992 words
992 words

For selecting windows of a building, designers should notice area of window, frame type, and kind of glazing. Windows are the significant part of building for saving energy so; size, color, frame, situation, and orientation of windows should consider (Sekhar et al., 1998). The other aspect that designer often attention to it, is high degree temperature and moisture which make problems for windows like; “Thermal movement, moisture movement, Chemical damages, and UV defects” (Divsalar, 2010). Therefore, there is solution to control moisture and heat loss in windows that is double glaze windows (Lapitis, 2005).
Now days there have been many changes for technology of the building envelope and specially glass. Glazing systems have significant role to control heat and light which have influence on the energy saving and thermal comfort in the building. The U-value has important role which should be better than 1 W/m²K, chart shows thermal efficiency through glazing and differences between seven kinds of glazing system (Smith, P. F., 2001).See figure 02. Therefore, double glazing window is one of the best materials for saving energy (Milne et al., 2000).

Figure 02. Heat transfer through different type of glazing (Smith, P. F., 2001).
The other aspect that improves saving energy is natural ventilation, and day light. In order to have suitable natural ventilation in hot humid climate, size of window should be big in the building façade. Moreover, direction of wind depend on the climate zone have influence on the size and situation of windows. As result of direction of prevailing wind that is from west in Famagusta (Ozay, 2005) so, windows in west face are noticeable. And in North side, windows often are suitable for natural ventilation (...

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...d reducing heat losses. Homogeneous makes by aero gels and glass fibres, that these materials are useful for higher temperature (Kaushika, et. al., 2003). See figure 10.
Figure 10. Different types of TIM.
(Reference: Kaushika, et. al., 2003)

TI materials can apply to the wall, window, sky light, and roof. (Dolley, et al. 1994, in Kaushika, et. al. 2003). Consequently, transparent insulation (TI) used in many projects and it shows that using TI decrease the heat losses and make the building skin as heat source, to retrieve of heat loss of other parts of building (Goetzberger A., et. al. 1992).
The desire of using TIM is to collect more solar radiation across devices. The designer should consider the solar radiation transmitting and heat transfer mechanism through devices. Then, engineers perceive helpful, and cost of the TIM devices (Kaushika, et. al., 2003).

In this essay, the author

  • Explains the importance of natural ventilation and day light in reducing energy consumption. wind direction and climate zone influence the size of windows.
  • Explains the different types of shading devices: exterior, interior, fixed, motorized, between an exterior glazing, and interior façade of double-façade system.
  • Explains the importance of window size, color, frame, situation, and orientation when selecting windows of a building. glazing systems have significant role to control heat and light.
  • Explains horizontal and vertical fixed louvers are suitable for northern face, while for western and eastern vertical louvers, are desirable. horizontal and light shelves can block the direct solar.
  • Explains that transparent insulation material (tim) reduces heat loss with solar radiation and conduction. it contains a transparent cellular (honeycomb) that surrounded by air layers.
  • Explains that ti materials can be applied to the wall, window, sky light, and roof. the desire of using tim is to collect more solar radiation across devices.
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