Evaporative cooling pad systems are recognized by their eco-friendly aspect in achieving a cooling effect. They are made of different materials that are imported from abroad. For Morocco and other low-and middle-income countries, the cost of the importing and shipping the systems may lead to high acquisition cost. To reduce this cost, using local materials is an important option. Within this context, the study of the performance of a new direct evaporative cooling pad based on pottery tubular rods is investigated experimentally. The current cooling pad is designed and constructed locally; it consists of tubular rods arranged in a staggered configuration. The length, the diameter and the space between the rods are 25 cm, 2 cm, and 2 cm respectively. The main performance indicators of this system such as the coefficient of performance, the saturation efficiency, the cooling efficiency, the convective heat, and mass transfer coefficient are deducted experimentally. Under the investigated conditions, the experimental findings show that the effect of the volumetric airflow rate on the energy-thermal-mass indicators is significant.

The evaporative cooling pad system permits to cool buildings with less consumption of the electricity and without any use of refrigerant gases. A good evaporative cooling pad system must have a higher coefficient of performance and a lower rate of water consumption. In this study, the Taguchi method is used to investigate the effect of the velocity, the thickness of the pad, and the type of pads on the performances of cellulosic cooling pads. It was found that the velocity has more influence on the coefficient of performance and the water consumption while the pad thickness is the more significant parameter on the outlet temperature. For the three indicators, the best combinations of the influencing parameters are identified. The obtained results are confirmed by ANOVA analysis, and for fast sizing of the considered cooling pads, a regression model was presented for the aforementioned performance indicators.

Despite to their impact on the environment and energy consumption, compression machines (direct expansion) are the most used air conditioner system in the residential sector. This large use is due to the low cost of this system compared to other technologies: absorption machine, ejection machine and adsorption machine. This paper evaluate the performance of solar assisted direct expansion air conditioner under the climate conditions of Rabat-Morocco. The results show that the system can save 20% of energy consumption and 645 Kg of CO ₂ emission mitigated compared to a conventional air conditioner.