Generally, an atmospheric water harvesting system useful in harvesting water from surrounding air. Specifically, a water harvester including a secondary heat exchanger operable in a first mode of the water harvester to absorb heat from the ambient environment to reduce the sensible heat penalty associated with increasing temperature to initiate desorption of water from a water capture material and in particular embodiments operable in a second mode of the water harvester to transfer heat from the desorbed water to the ambient environment.

The present invention relates to an electric and non-electric combined dehumidifier in which, even though an electric dehumidifier that consumes an allowable margin electricity is used in an industrial site where it is previously installed and has difficulty in increasing the electric capacity, a non-electric dehumidifier that does not use electricity is used together when the dehumidification performance is insufficient, thereby capable of improving dehumidification performance.

A capture vessel is provided that is configured to capture carbon dioxide (CO.sub.2) according to a thermal swing adsorption (TSA) process. The capture vessel includes capture media that are configured to adsorb CO.sub.2 from an exhaust gas during a CO.sub.2 capture stage to produce a first N.sub.2 gas that exits the capture vessel, receive a mixed stream of CO.sub.2 and water vapor during a wet regeneration stage, adsorb water from the mixed stream of CO.sub.2 and water vapor and release adsorbed CO.sub.2 during the wet regeneration stage to produce a CO.sub.2 stream, receive a first heated N.sub.2 gas and release adsorbed water due to evaporation caused by the first heated N.sub.2 gas during a drying stage, and receive a cooled gas during a cooling stage such that an absorption capacity of the capture media for CO.sub.2 capture is increased for a next CO.sub.2 capture stage.