Dehumidification system

Patent metadata

Field	Value
Publication number	US-12410923-B2
Application number	US-202117995746-A
Country	US
Kind code	B2
Filing date	Apr 27, 2021
Priority date	Apr 27, 2020
Publication date	Sep 9, 2025
Grant date	Sep 9, 2025

Abstract

A dehumidification system for removing water vapors from an air is disclosed. The system includes a dehumidification core defining an air channel and at least one vapor channel separated from the air channel by a membrane to facilitate a removal of moisture from the air flowing through the air channel and is selectively permeable to water and water vapor and impermeable to air. The dehumidification system further includes a water ejector having a throat portion fluidly coupled to the vapor channels and adapted to create a relatively lower pressure of water vapor within the vapor channels than in the air channel The water ejector also includes an outlet portion disposed downstream of the throat portion and configured to increase the pressure of water to facilitate a condensation of the water vapors received from the vapor channels.

First claim

What is claimed is:

1. A dehumidification system for removing water vapors from an air, the dehumidification system comprising:
at least one dehumidification core defining an air channel and at least one vapor channel separated from the air channel and including
a membrane separating the at least one vapor channel from the air channel and adapted to facilitate a removal of moisture from the air flowing through the air channel, wherein
the membrane is selectively permeable to water and water vapor and impermeable to air,
wherein the membrane includes an ion exchange capacity of at least 1.0 milliequivalents per gram;

a liquid ejector having:
a throat portion fluidly coupled to the at least one vapor channel and adapted to create a relatively lower pressure of water vapor within the at least one vapor channel than in the air channel, and
an outlet portion disposed downstream of the throat portion and configured to increase the pressure inside the liquid ejector to facilitate a condensation of the water vapors received from the at least one vapor channel;

a reservoir for storing a liquid and configured to receive the liquid from the liquid ejector; and
a pump fluidly connected to the liquid ejector and the reservoir and configured to supply the liquid from the reservoir to the liquid ejector.

2. The dehumidification system of claim 1 , wherein the reservoir includes a drain valve for facilitating a drainage the liquid from the reservoir when a level of the liquid inside the reservoir reaches above a first threshold level.

3. The dehumidification system of claim 1 , further including a heat exchanger fluidly connected to the liquid ejector and configured to receive at least a portion of the liquid exiting the liquid ejector, wherein the heat exchanger is configured to cool the received liquid.

4. The dehumidification system of claim 3 , wherein the heat exchanger is disposed upstream of the reservoir and supply the cooled liquid to the reservoir.

5. The dehumidification system of claim 1 , wherein the relatively lower pressure of water vapor is up to −960 mbar gage pressure.

6. The dehumidification system of claim 1 , wherein the liquid ejector is a water ejector adapted to receive liquid water from the pump.

7. The dehumidification system of claim 1 , wherein the membrane comprises a sulfonated block copolymer having one or more copolymer block configurations corresponding to any of A-B-A, A-B-A-B-A, (A-B-A) n X, (A-B) n X, A-D-B-D-A, A-B-D-B-A, (A-D-B) n X, (A-B-D) n X or mixtures thereof, where n is an integer from 2 to 30, X is a coupling agent residue, and wherein the sulfonated polymer has a degree of sulfonation of >25.

8. The dehumidification system of claim 1 , further including a booster pump arranged between the dehumidification core and the liquid ejector to reduce the pressure inside the vapor channels to a pressure below a partial vapor pressure of water.

9. The dehumidification system of claim 8 , the booster pump facilitates in reducing the pressure to a value less than equal to 31.7 mbarA at 25° C.

10. The dehumidification system of claim 9 , wherein the booster pump facilitates in reducing the pressure to <150 mbarA, or to 10 mbarA-40 mbarA.

11. An air-cooling system, comprising the dehumidification system of claim 1 , and an evaporative cooler for cooling the air by facilitating an absorption of water into the air, wherein the evaporative cooler is disposed downstream or upstream of the at least one dehumidification core.

12. An air-cooling system, comprising:
at least one dehumidification core defining an air channel and at least one vapor channel separated from the air channel and including
a membrane separating the at least one vapor channel from the air channel and adapted to facilitate a removal of moisture from the air flowing through the air channel,
wherein the membrane is selectively permeable to water and water vapor and impermeable to air,
wherein the membrane includes an ion exchange capacity of at least 1.0 milliequivalents per gram;

a water ejector having
a throat portion fluidly coupled to the at least one vapor channel and adapted to create a relatively lower pressure within the at least one vapor channel than in the air channel, and
an outlet portion disposed downstream of the throat portion and configured to increase the pressure of water to facilitate a condensation of the water vapors received from the at least one vapor channel;

a reservoir for storing water and configured to receive the water from the water ejector;
a pump fluidly connected to the water ejector and the reservoir and configured to supply the water from the reservoir to the water ejector; and
an evaporative cooler for cooling the air by facilitating an absorption of water into the air, the evaporative cooler is disposed downstream or upstream of the at least one dehumidification core.

13. The air-cooling system of claim 12 , wherein the reservoir includes a drain valve for facilitating a drainage of the liquid water from the reservoir when a level of the liquid water reaches above a first threshold level.

14. The air-cooling system of claim 12 , further including a heat exchanger fluidly connected to the water ejector and configured to receive at least a portion of the liquid water exiting the water ejector, wherein the heat exchanger is configured to cool the received liquid water.

15. The air-cooling system of claim 12 , wherein the heat exchanger is disposed upstream of a reservoir and supply the cooled liquid water to the reservoir, and wherein the heat exchanger is an air to liquid heat exchanger.

16. The air-cooling system of claim 12 , further including a booster pump arranged between the dehumidification core and the water ejector to reduce the pressure inside the vapor channels to a pressure below a partial vapor pressure of water.

17. The air-cooling system of claim 16 , wherein the booster pump facilitates in reducing the pressure to a value <=31.7 mbarA, or <150 mbarA, or between 20 mbarA and 40 mbarA at 25° C.

18. The air-cooling system of claim 12 , wherein the evaporative cooler is a first evaporative cooler disposed upstream of the dehumidification core and adapted to cool the air flowing to the dehumidification core, the air-cooling system further includes a second evaporative cooler disposed downstream of the dehumidification core and configured to cool the air received from the dehumidification core.

Assignees

• Kraton Polymers Llc
• Notark Corp

Inventors

• Mhetar Vijay
• Tocchetto Roger

Classifications

• F24F2003/144

  by dehumidification only · CPC title

• F24F2003/1435

  comprising semi-permeable membrane · CPC title

• F24F5/0035

  using evaporation · CPC title

• B01D53/268

  by diffusion · CPC title

• B01D53/265

  by refrigeration (condensation) · CPC title