Water recovery for sorbent bed by virtue of hot link

Abstract

The invention relates to water recovery for a sorbent bed by virtue of a hot link, and particularly relates to a water recovery system. The water recovery system comprises a sorption bed, a desorption bed, a heat pump and a controller, wherein the sorption bed is used for receiving a first fluid flow and absorbing and / or adsorbing water from the first fluid; the desorption bed is aligned with the sorption bed and connected to the sorption bed, and used for receiving a second fluid flow and desorbing water to the second fluid flow; the heat pump is arranged between the sorption bed and the desorption bed, and used for transferring heat to the desorption bed from the sorption bed; and the controller is used for distributing a power to the heat pump so as to keep that the temperature of an area close to the outlet of the desorption bed is greater than the temperature of the area aligned by the area close to the outlet of the desorption bed, of the sorption bed. A method for recovering water form a fluid flow comprises the step of guiding the fluid flow to penetrate through the water recovery system.

Description

Background technique Water recycling is an important process in spacecraft environments and some other confined air environments. Dry air streams are desired or required for some basic spacecraft processes like carbon dioxide removal. Some carbon dioxide removal systems (molecular sieves) cannot tolerate moisture in the incoming fluid stream. Others (amine sorbents) undesirably lose moisture content in the fluid stream. For example, on short-duration spacecraft missions, moisture recovery may not be critical and amine sorbents can function adequately. However, on longer missions, it may be necessary to recover the water so that it can be reused. In these cases, water recovery typically precedes carbon dioxide removal. In current practice, water recovery from process air utilizes a desiccant medium that is cyclically loaded and unloaded by removing water from the wet process stream , while the unloading takes place by heating to desorb the adsorbed water and return it to th...

AI Technical Summary

Problems solved by technology

Therefore, current water removal systems are inherently large in size and require large amounts of energy to operate

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