Extraction of water from air moisture using underground temperature (case study: Examine the performance of the system in Bandar Abbas)

Background and objectives: Maintaining water resources as well as economic and fair exploitation of it is a global issue. Today, Due to the lack of water resources in many parts of the world, Disputes over the access to water resources pass national borders and access to these resources has become a strategic objective in interacting between countries. Based on the statistics released by the World Resources Institute in 2015, 33 countries will face the water stress in 2040in which Iran ranked 13. Considering the rainfall average of Iran, the amount of water resources, and per capita consumption of the country, Iran can be considered as the countries facing the lack of physical water resources. The objective of this research is to provide the safe water for agricultural use as the most widely used water sector in the country as well as beverage consumption without the use of fresh water sources, and only by exploiting the humidity of air.

Materials and methods: In this research, designing a new system to extracting the clean water through the air moisture is considered. The methods applied in this research are the library method, statistical method, and analytical method. In this system, a part of the air humidity is separated and appears in the form of droplets of water on the channel wall. Then. The obtained water stored in a tank and use for the considered purpose.
Results: The total amount of water obtained at a depth of 3 meters is equivalent to 67.53 in 4 meters 73.16 and in 5 meters 62.05 liters in 12 hours (total hours at 15th of every month). In general, the amount of water obtained by this method is varied depending on the climate and other conditions. In this research, the system is studied in Bandar Abbas. So, the water obtained ranged between 5 and 20 liters per hour in warm months.
Conclusion: The results show by applying the stated method, especially in warm and humid areas, the acceptable levels of clean water can be achieved. It is necessary to note that all calculations in this paper are based on theoretical relations. So, the clean water obtained through the designed system may not be equal to the numerical value obtained. However, due to the water crisis in the country, achieving half of this amount could also be an acceptable contribution to reducing the water crisis and solving the problem of water scarcity.