Assessment of the impact of aerogel materials on the energy consumption of hotels under the coastal Mediterranean climate

G. Kihal, D. Rouag Saffidine, Y. Laraba, O. Sotehi


With the increasing emphasis on sustainable development and climate change issues, there is an urgent need to address the issue of greenhouse gas emissions induced by the misuse of energy appliances in buildings. In Algeria, the building sector is the most energy-intensive, with the tertiary sector representing a very important fraction given its enormous energy consumption. As hotel construction is a current project in the country, they are addressed in this research which aims to highlight their needs for heating, cooling, lighting. More precisely, an investigation combining experimental work (air and surface temperature measurements and thermography) and numerical simulation (using TRNsys V17) was conducted on a prototype (an urban hotel) in Algiers, a city with a coastal Mediterranean climate. A diagnosis of the actual thermal comfort conditions and the results revealed that the envelope is not protective from external climatic agents mainly due to heat loss through walls, roofs, and floors, windows. To overcome this challenge, a proposal to integrate new insulation materials based on aerogels (silica aerogels) allowed a significant reduction in energy loads. This allowed reaching comfort levels in the study rooms (more than 53% reduction for heating needs and 43% for cooling needs compared to non-insulated rooms).

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