Use of Porous Materials for Enhanced Night Cooling of Naturally Ventilated Building

This project is about the investigation of the use of porous material for enhanced night cooling of naturally ventilated building with the aid of reducing or eliminating the air conditioning system which leads to energy consumption reduction and thus energy saving. The theoretical model simulates a single room in a multi-room office building using a written excel program. It is suppose to make use of a one-dimensional form of heat transferring through the fabric i.e. the temperature varies with distance only in the x direction. The heat transfer between rooms and also the thermal storage of the internal walls are negligible. It is been trying to read the present researches in the same field of the present thesis in order to take the advantages of them. The present researches are investigated the dynamic insulation, night cooling, naturally ventilated building and its configuration. In the next step the theoretical approaches and mathematical methods using for the excel program are explaining, and the current software needs to modify in order to include the velocity value of the air. Some calculation must be done considering a range of conditions such as data specification, external temperature (considering the hot climate region), dimensions of the wall, thermal properties of wall, ventilation rate and time, and the internal heat gain for porous and non-porous materials. The office is running from 8 in the morning and 6 in the evening, while an extract vent has been considered for the room. The supply system is going to have a positive value for ventilation rate and the extract system will be with a negative value. Finally, the results achieved from the calculations are comparing together and investigate the performance of the porous material. It is necessary to consider the air temperature profile and fabric temperature in order to find the accurate result.

Keywords:

Natural ventilation , Energy , Porous materials , Night cooling , Dynamic insulation