The effects of carbon fuel consumption on the environment have stimulated development of a ‘net-zero’ energy measurement in buildings envelope for sustainable buildings a net-zero energy is key to reducing energy use and saving money .For several decades, low-income citizens in Moroccan cities have been suffering from thermal inequality, energy poverty and thermal comfort constraints.The article presents the integrated the mechanical solar ventilation and phase change materials into the building envelope using the simulation software of the thermal behavior in dynamic regime TRNSYS, this project aims at the design of a single- family house whose energy balance over one year of operation. In particular when the air temperature is close to the melting temperature 22 °C . A global building model consisting of a building envelope modeled and simulated in TRNSYS and EnergyPlus and the modeled exchanger Mechanic solar ventilation air/PCM fan system is simulated under climate (CASABLANCA NOUSSEUR).The energy consumption related to the specific uses of electricity is taken into account in the annual energy balance. The results show that the Mechanical solar ventilation with the phase change materials (PCM+MSV) reduces the operating temperature of the house significantly and relative humidity and maintain the demand energy from HVAC system. Indeed, the Mechanical solar ventilation has decreased its average operating temperature by about 2.7°C-3°C and created the fresh and comfort space.
Keywords Phase change material, Mechanical solar ventilation, Desingbuilder, Trnsys, Comfort, Thermal performance, Energy efficiency