Energy Saving Analysis In Building Walls Through Thermal Insulation System

In this study, we discuss about the energy saving in different type of building walls by using optimum insulation thickness with suitable insulation material. The energy saving is maintained by reducing the energy consumption in buildings. Heat losses from building envelope have a major share in waste of energy. So it is essential to save the energy by using optimum insulation thickness. The insulation thickness and energy savings are calculated by using Life-cycle cost analysis over life time of 10 years of the building. Using proper insulation in building is most effective way of energy saving in building walls. This paper provides an analysis for determining optimum insulation thickness for the different wall types; Brick, Concrete and Stone which are used in building construction in India. Extruded polystyrene (XPS) and Expanded polystyrene (EPS) are selected as insulation material. In this paper, heat load (loss of heat) is calculated by using Degree-Day method. As a result; the optimum insulation thickness varies between 5.2 and 7.4 cm and energy saving varies between 2560 and 5510 Rs/m 2 , depending on cost of fuel, climatic conditions of Dehradun(India), cost of insulation material and its thermal conductivity.