• Energy Research
• 11. Sustainability close

International audience; The purpose of this work is to study the possibility of obtaining a net zero energy building and producing fresh water via a solar still by using a hybrid PV/T water solar collector. A solar prototype built in the city of Boussaâda is studied under the climate of Ouargla city to show the importance of the use of passive solar architecture. The results highlight the importance of using passive solar techniques to reduce heating energy needs. Energy savings are realized with passive techniques even before the use of active solar systems. It is possible to cover the energy requirements with the use of hybrid PV/T water solar collectors. High solar thermal fractions for domestic hot water are achieved during the year. Solar electricity produced is high and can cover the annual needs of domestic hot water, air conditioning and heating, lighting and household equipment of the prototype. A part of the difference in area between that used to cover the thermal requirements of domestic hot water and the total area of the PV/T collectors is used for supplying a solar still. An increase in the annual production of 2.97 times is obtained compared to passive solar still.

Abstract The aim of this study is to demonstrate the requirement to integrate the urban microclimate to predict the energy needs of buildings. To do this, an integrated approach in TRNSYS software was developed and compared with existing experimental results of a street canyon. Afterwards, a case study was carried out in the case of a street canyon located in the city of Tangier in Morocco. The impact of the aspect ratio on the temperature of the building surfaces and the radiation absorbed by them was examined. The results show that there is greater radiation absorption on the building facades in street canyons than on those of stand-alone buildings. These effects lead to higher surface temperatures in street canyons, resulting in increased cooling energy needs in summer and reduced heating energy needs in winter.