Experimental and statistical analysis of a solar desalination HDH arrangement with high-speed acceleration centrifugal sprayer

The humidification-dehumidification (HDH) technology is attractiving for limited desalination. The freshwater productivity using a centrifugal sprayer-based solar HDH system at different sprayer hole diameters and high speeds is discussed in the present work. The hole diameter and operating speeds range from 0.001 to 0.003 m and 1100–1800 rpm, respectively. Experimental data were analyzed using 120 experiments and optimized by the response surface methodology (RSM). The RSM was used to explain the effects of desalination system factors and their interaction to achieve optimum operating conditions for the highest freshwater productivity. The optimum conditions to reach the highest freshwater productivity are 0.00113 m hole diameter and 1149.48 rpm centrifugal sprayer speed at noon. Also, the optimum operating conditions obtained the highest accumulated productivity at a hole diameter of 0.001 m and a speed of 1219.76 rpm. The analysis of variance indicates that the models can predict freshwater productivity and accumulated productivity with a confidence level of over 98 %. •Centrifugal sprayer-based solar HDH desalination systems were studied.•RSM was used to characterize factor effects and their interactions.•The sprayer speed and hole diameter affect the productivity of the proposed system.•The model desirability is over 0.98 of the optimization process.