Performance of Solar Window Film With Reference to Energy Rationalizing in Buildings.
In the last decades the growing need for comfort conditions in residential
buildings and the... See more
In the last decades the growing need for comfort conditions in residential
buildings and the severe summer conditions typical of Mediterranean climate have
led to an ever-increasing request for the installation of air-conditioning systems. This
has led to rising consumption of electricity and has influenced the cost of electricity
and the need for more power plants. Furthermore, the CO2 equivalent emissions’ factors from electricity will rise. In this study, two wooden cabinets (cabinets A and B)
were built to be a model for two rooms in a building in city of Duhok, Iraq. These
cabinets were of double-glazed window, insulated by air. Solar control window film
(SCWF) has been attached on the window of one of the cabinets (cabinet B).
Measurements of the following physical variables parameter were performed, outside
and inside the cabinets: solar radiation (SR), temperature (T), and relative humidity
(RH). The measurements were done in two different cases: one, when the surface
color (SC) of both cabinets was white and, for the other, when the SC was black.
In this study, we investigate the performance of solar control window films based
on a clear double glass window for one of the cabinets. The study is generalized for
a large-scale practical case if a window film of similar properties is applied to the
windows of rooms in a building in Duhok, Iraq. Thermal conductivity of each glass,
wood, and SCWF has been measured. The absorbance and transmittance of the
window glass as well as the solar control window film have been measured by using
the UV, VIS, and NIR spectrophotometer instruments. It was found that the
temperature of cabinets depends on surface color (SC) of the cabinet. In case of
white surface (WS) cabinet, the temperature of cabinet was approximately 10 °C
lower than black surface (BS) of cabinet, while the temperature difference between
cabinet A [CA] and cabinet B [CB] was approximately equal to 5 °C. In case of
black surface) BS) cabinet, the temperature difference between CA and CB was
about 7 °C. It was observed that the blocking capacity of thin solar control film
depends on the time of day and weather conditions. Utilizing window films in a
building will lead to reduction in heat gain from solar radiation, i.e., it will reduce the building cooling load in summer, or using the solar control window films in
buildings will lead to reduce the electrical energy consumption in summer. Also,
this will contribute in reducing CO2 and other greenhouse gases (GHG) emissions
that cause global warming in the world. Further advantages in using such film are
the reduction of glare, heat, and UV
2019-05