Estimating the energy consumption in building sector in Algeria using bottom-up mode

Projections of energy demand are important for energy security supply, and habitually rely on final energy consumption trends methods, limiting the opportunity for future options. Methods supported by energy services are much preferred to predict future energy demand, since they are better suited to accomplish end-users needs. Final energy can then be assessed through complementary tools, as technological models, resulting in deeper knowledge on the relation between energy services and technology options. This study presents a bottom-up methodology to project detailed energy end-uses demand of the Algeria residential building until 2040. The estimation of annual energy consumption involves the determination of the climatic zones in Algeria to determine the space load for cooling and heating due to heat transfer through the building envelope using degree days method, ArcGIS (geographic information system) and Google earth. Analyzing the results shows the importance of treating houses according to the location specifications of each climatic zone, and the required energies for heating and cooling are 6.4%, 19% for zone 1 and 16%, 1 % for zone 7. The results show that cooking, heating and hot water are the major means of energy consumption in the residential sector in Algeria and that is because of the total end-use in Algeria.