Water is an essential resource for life and indispensable for human survival. However, due to the uneven distribution of water resources, the impacts of climate change, and rapid population growth, ensuring sufficient quantities of drinking water remains a major global challenge. One promising approach to addressing this problem is atmospheric water harvesting (AWH), as a large amount of water is present in the Earth's atmosphere primarily in the form of water vapour. This master's thesis investigates an AWH system using a hygroscopic material, focusing primarily on the desorption of water from the hygroscopic material and the influence of solar optical concentration on the performance of the device. The study examines the influence of temperature conditions within the system on the desorption of water vapour and the efficiency of the water harvesting process. The experimental part of the study was conducted under different illumination conditions of the device, while key operational parameters, including temperature, relative humidity, and the amount of harvested water, were monitored. The distribution and intensity of solar radiation were first characterised for different optical configurations, using one and two flat mirrors and a parabolic concentrator. The experimental measurements with the SAWH device were conducted in two configurations, one without additional illumination and the other with two flat mirrors.
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