water purification system to transfer water vapor using temperature difference at sub-atmospheric pressure

This study provides a method for natural desalination and water transportation by using initial costs without having to consume a lot of energy to run. the study examines the state of the flow control of the transmission pipes and proposes a three-stage mechanism for water production in evaporation, transport, and condensation. because of the temperature difference between evaporation and condensation, the pressure difference causes steam flow from the evaporation part to the condensation part. the study used a pipeline diameter of 1 and 2 meters to transmit vapor to the tochal mountain in northern tehran and the height of the mountain at an altitude of 3963 m, 8 km from the underground waters of tajrish. the results indicate that the differences in diameter, transportation length, and temperature are the most influential factors for the efficiency of the transportation of sub-atmospheric vapor, respectively. based on the results, the amount of distilled and transported water is calculated for a one-meter diameter transmission pipe of 10,000 cubic meters per year and for a 2-meter diameter pipe, 66,000 cubic meters.