Optimization of Process Parameter for Passive Type Double Slope Solar Still–Taguchi Method

An eco-friendly method that shows promise for turning brackish water into pure water is the still, in that the best widely available substitute energy source is solar energy. Since the sun doesn’t exist at night, solar energy is sporadic in nature. Its overall availability value varies seasonally and is dependent on local weather conditions. Solar energy is therefore an unstable energy source. Thus, heat energy storage is required to store solar energy while there is no load or when solar energy is ample and to compensate for energy deficits when the load requires energy. To store this energy and meet daytime and nighttime energy demands, highly efficient storage materials are essential. Here, sensible heat-storage elements include: Red brick, seashells, basalt stone, and quartzite rock were involved in experimentation. To maximize the performance of solar still, sensible heat storage materials were employed. A number of parameters were assessed, including the water’s depth, the material’s size, quantity, and material type. The Taguchi method was employed to determine the solar still’s control parameter influence and to maximize the experimentation conditions based on a small number of trials and the participation of a single parameter. At the ideal reaction conditions, a maximum of 728 ml of output water was produced with 750 g of red quartzite rock at a depth of 25 mm. Compared to other conventional energy storage materials, the quartzite rock exhibits good storage of energy ability.