A comparative study about the energetic impact of dryland residential buildings with the integration of photovoltaic system

Nowadays, the Algerian energy consumption among the residential sector ranks first. The national energetic consumption is growing in an inordinate way because the Algerian state has launched a massive plan of housing construction without taking in consideration the legislation of energy performance. In addition, the simultaneous change of users requirements to maintain their comfort, especially in summer, which leads to a large amount of electricity consumption through using air conditioning. In the actual study, we focused on the seasonal consumption of air conditioning system that varies according to the degree of comfort and air-conditioned area. In Ouargla city, in the south of Algeria, the analysis of historical energetic data shows that the cooling system of the building consumes more than 63% of the total energy per year in the average. To decrease this considerable seasonal energy consumption, the building energy performance should be improved by two solutions. The passive solution is through the optimization of the envelope, while the active solution is the integration of PV system. Obtained results, through the analysis of simulation showed that 172 kWh/m(2) is consumed by the cooling system which represents more than 70% of the total energy consumption in Hollow Brick envelope. However, in the performance envelope (3D panel) the integration of photovoltaic panels in the roof can reduce seasonal energy consumption until to 87.4 kWh/m(2) per year which represents more than 50% of the total energy consumption. In the case of (3D panel) we can save the half 50% of the total energy consumption. (C) 2017 The Authors. Published by Elsevier Ltd.