Abstract
The building envelope is the barrier between the interior and exterior environments. It has many important functions, including protecting the interior space from the climatic variations through its envelope materials and design elements, as well as reduction of energy consumption and improving indoor thermal comfort. Furthermore, exterior building sidings, in addition to their aesthetic appearance, can have useful textures for reducing solar gains and providing good thermal insulation performance. This research examined and evaluated the effect of external siding texture and geometry on energy performance. For this objective, a field in situ testing and investigation of surface temperature was carried out on four samples (test boxes) with different exterior textures and different orientations, under the climate zone of Constantine–Algeria during the summer period. The results indicated significant dependability between the exterior texture geometry, the percentage of shadow projected, and external surface temperature. The second part of the research involved a similar approach, exploring the effect of three types of particles with the same appearance but with different thermal characteristics. It was concluded that the natural plant aggregates “palm particles” had the best performance, which contributed to a significant reduction of external surface temperature reaching 4.3 °C, which meant decreasing the energy consumption.
Highlights
At 9:00 a.m., the air temperature (AT) recorded by the weather station (Oregon Scientific) was 33.3 ◦ C, the relative humidity was around 20%, and the solar radiation on a vertical plane recorded by the pyranometer was approximately 224 (W/m2 )
The crystal texture represented the lowest value of external surface temperature (EST) = 28.5 ◦ C
With a difference of 2.7 ◦ C compared to RTB1 and 4.3 ◦ C compared to RTB2. These results prove that the use of palm particles in several densities can significantly reduce the external surface temperature (EST) at the level of the rough texture, of which we noticed a difference of EST up to 4.3 ◦ C
Summary
Climate change is one of the most debated topics of the 21st century. The planet has experienced phenomena caused by this change, such as rising temperatures, heat waves, rising sea levels, more intense storms, and forest fires. Since 1930, Over 100,000 new chemical compounds have been developed, and there has been missing information on the health assessment of such chemicals, of which a large portion are used in construction products. Portland cement concrete, which is the most widely used material on the planet (10,000 million tons/year, and which, in the 40 years, will increase by about 100%), contains chemicals used to modify their properties, fresh or hardened, whose effects on health and the environment are not yet fully understood [1]
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