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This study focused on the optimal production feasibility of distilled water from the concentrate of a reverse osmosis device using an evacuated tube collector basin solar still. The characteristic effect of the device's condenser on the produced freshwater volume was evaluated to improve the performance of the solar still, resulting in productivity enhancement. The direct contact of two faces of the cubic condenser with water vapor results in the doubling of the effective surface area. However, freshwater production was decreased by eight times compared to the case where only one face of the condenser is in contact with water vapor. This reduction was attributed to the shorter path taken by the condensed droplets. At the bottom of the evacuated tube collector, some building mineral pumice was used to prevent the formation of large water vapor bubbles. According to this methodology, the average daily production of distilled water from the concentrate of the reverse osmosis unit with a total dissolved solids of 15200 ppm was achieved at 4.58 ± 0.12 L. m − 2 . The quality of produced distilled water revealed that solar desalination using an evacuated tube collector basin solar still can be a notable and economical solution for the concentrate treatment of reverse osmosis. [Display omitted] • The longer the droplets' path on the glass condenser's surface, the higher the freshwater production rate. • The movement path of liquid droplets to the outlet with angles of θ = 0 ° is equal to the length of the condenser. • The ETC has the potential to transfer part of the salty water by the rise of large water vapor bubbles. • Building mineral pumice can be used to prevent the formation of large vapor bubbles at the bottom of the ETC. • Modified ETC basin solar still can be a considerable solution for the desalination of RO concentrate. [ABSTRACT FROM AUTHOR]

One of the problems with the gas turbine is the reduction of output power and thermal efficiency with an increase in the ambient temperature. This problem is serious, especially in hot and dry areas. To solve this problem, in this study, the connection of the steam jet refrigeration (VJRS) unit to a gas turbine is investigated. By designing a VJRS as an open cycle in this connection, in addition to cooling the inlet air, it is also possible to inject steam into the turbine as a steam-injected gas turbine (STIG) system. So in this process reducing the compressor power consumption and increasing the turbine output power are done simultaneously. With the possibility of injecting most of the steam into the turbine, in addition to the possibility of removing the condenser in the VJRS, the need for cooling water is also eliminated in this process. Therefore, by using a saltwater source to generate steam using the waste heat of the gas turbine, it is possible to increase its output power without the consumption of fresh water. Also compared to a combined cycle, is shown the ability of this process to increase the output power without needing to install additional expensive equipment. • Connecting the vapor jet refrigeration system to the steam injected gas turbine. • The steam is used for making of cooling and injecting to the turbine parallelly. • Reducing compressor power consumption and rising turbine output power parallelly. • Possible to delete condenser from vapor jet refrigeration system in this process. • No consuming freshwater by producing steam from a saltwater source. [ABSTRACT FROM AUTHOR]