DESIGNING NEW THERMAL INSULATION SYSTEMS BASED ON NATURAL MATERIALS FOR THE VERTICAL WALLS OF BUILDING

The purpose of this article is to propose a range of natural-based external thermal insulation (ETI) \nsystems for the vertical walls of a residential building located in the Southwest region of Algeria \n(Bechar), which represents the real case of the majority of constructions existing in the area. To \nachieve this, a combination of thermal insulation systems was realized, using natural origin materials \nsuch as wood wool, cellulose wadding, expanded cork, hemp fiber, and sheep wool. The evaluation \nof energy consumption (heating and air conditioning) was carried out using a dynamic thermal \nsimulator \"TRNSYS\". In order to establish a precise estimate of the savings achieved and the payback \nperiod on investment, a techno-economic study was conducted for all the tested systems. The results \nobtained show a considerable efficiency of the proposed natural-based systems compared to \nsynthetic-based system for the thermal insulation of vertical walls, allowing significant energy \nsavings in the form of annual benefits while improving the energy performance of the studied building \nas well as the quality of life of its occupants.