IP Library › Granted Patent US 12,276,436
Granted Patent B2
US 12,276,436 · App. 18/646,505 · Granted Apr 15, 2025

Ultra low flow desiccant air conditioning systems devices and methods

Inventors: Philip Farese (New Canaan, CT); Rachel Ellman (Cupertino, CA); Kristopher Toivola (Sunnyvale, CA)
Assignee: Mojave Energy Systems, Inc.
F24F3/1429F24F3/1417F24F2003/1458
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Quick Facts
Patent No.
US 12,276,436
App. No.
18/646,505
Filed
Apr 25, 2024
Granted
Apr 15, 2025
Kind
B2
Art Unit
1776
USPC
95/44
Abstract

Systems and methods for conditioning air streams are described herein. In some embodiments, a system can include an absorber and a desorber. The absorber configured to receive a supply air stream including moisture at a first moisture concentration and expose it to a liquid desiccant to remove moisture from the supply air stream and produce a conditioned air stream. The desorber configured to receive a regeneration stream at a first mass flow rate and at least a portion of the liquid desiccant from the absorber and having at least one salt at a first weight percent. The desorber includes an array of emitters configured to direct the portion of the liquid desiccant at a second mass flow rate to a desorber media to facilitate removing moisture from the portion of the liquid desiccant and produce a concentrated liquid desiccant with the at least one salt at a second weight percent.

Claims (63)

1. A method of regenerating a liquid desiccant with a desorber, the desorber including a housing defining an interior volume, and a distributor component including a conduit and an array of emitters disposed along the conduit, the method comprising:

directing a gas at a first mass flow rate having a predetermined temperature and humidity across a media bed disposed within the interior volume of the housing;

receiving the liquid desiccant at the conduit, the liquid desiccant including water and a salt at a first salt concentration by weight;

dispensing, through each emitter of the array of emitters, the liquid desiccant to the media bed at a second mass flow rate such that the liquid desiccant wets the media bed and water is transferred from the liquid desiccant to the gas; and

after the dispensing, directing the liquid desiccant out of the housing via an outlet port,

wherein the first mass flow rate is selected so that when the water is transferred to the gas with the liquid desiccant dispensed at the second mass flow rate, the liquid desiccant at the outlet port becomes regenerated and includes the salt at a second salt concentration by weight, the second salt concentration being larger than the first salt concentration.

2. The method of claim 1 , wherein the predetermined temperature is at least about 65° F. and the predetermined humidity is no more than about 0.012 kg of water content per kg of gas.

3. The method of claim 1 , wherein the predetermined temperature is at least about 85° F. and the predetermined humidity is no more than about 0.025 kg of water content per kg of gas.

4. The method of claim 1 , wherein the second salt concentration is at least 1% greater than the first salt concentration.

5. The method of claim 1 , wherein a temperature and a water vapor pressure of the liquid desiccant at the outlet port approaches equilibrium with the gas entering the desorber.

6. The method of claim 1 , wherein a temperature and a water vapor pressure of the liquid desiccant at the outlet port approaches within 5 degrees Fahrenheit and 0.25 psi water vapor pressure of the gas entering the desorber.

7. The method of claim 1 , wherein the desorber is configured to be operably incorporated into a liquid desiccant system including an absorber; and an amount of heat transported by the liquid desiccant to a process air stream in the absorber after exiting the housing via the outlet port is minimized by minimizing the second mass flow rate.

8. The method of claim 7 , wherein the amount of heat transported by the liquid desiccant to the process airstream is no more than at least one of 2 kW or 2% of a cooling capacity of the liquid desiccant system.

9. The method of claim 8 , wherein an amount of heat required to regenerate the liquid desiccant in the desorber is minimized by minimizing the second mass flow rate.

10. The method of claim 9 , wherein the amount of heat required is no more than about 20 kW.

11. The method of claim 1 , wherein the second mass flow rate is selected to maximize an effectiveness of the desorber.

12. The method of claim 1 , wherein the second mass flow rate is selected to be a predetermined value that is high enough to prevent sputtering and low enough to prevent jetting thereby preventing carryover of the liquid desiccant into the gas.

13. The method of claim 1 , wherein the desorber is configured to be operably incorporated into a liquid desiccant system, the liquid desiccant transfers heat to a supply airflow of the liquid desiccant system after exiting the housing via the outlet port, and the second mass flow rate is selected such that the heat transferred to the supply airflow reduces the efficiency of the system by no more than about 1%.

14. The method of claim 1 , wherein the first mass flow rate is at least about 20 times the second mass flow rate.

15. The method of claim 1 , wherein each emitter from the array of emitters includes:

a casing defining an interior volume;

an inlet orifice disposed on the casing and configured to fluidically couple the conduit to the interior volume; and

an outlet orifice disposed on the casing and configured to dispense the liquid desiccant to the media bed at the second mass flow rate,

wherein a pressure drop between the inlet orifice and the outlet orifice of each emitter from the array of emitters being at least equal to a pressure drop across the conduit.

16. The method of claim 15 , wherein a density of the array of emitters is selected to maximize the effectiveness of the media bed.

17. The method of claim 16 , wherein the density of the array of emitters is greater than about 1 emitter per square foot.

18. The method of claim 15 , wherein the pressure drop between the inlet orifice and the outlet orifice of each emitter from the array of emitters is at least three times a pressure drop across the conduit.

19. The method of claim 15 , wherein the pressure drop between the inlet orifice and the outlet orifice of each emitter from the array of emitters is at least about 1 psi.

20. A method of regenerating a liquid desiccant with a desorber, the desorber including a housing defining an interior volume, and a distributor component including a conduit and an array of emitters disposed along the conduit, the array of emitters disposed along the conduit and having a density greater than about 1 emitter per square foot, the method comprising:

directing a gas at a first mass flow rate having a predetermined temperature and humidity across a media bed disposed within the interior volume of the housing;

receiving the liquid desiccant at the conduit at a first concentration by weight;

dispensing, through each emitter of the array of emitters, the liquid desiccant to the media bed at a second mass flow rate such that the liquid desiccant wets the media bed and water is transferred from the liquid desiccant to the gas; and

after the dispensing, directing the liquid desiccant out of the housing via an outlet port,

wherein the first mass flow rate is selected so that when the water is transferred to the gas with the liquid desiccant dispensed at the second mass flow rate, the liquid desiccant at the outlet port becomes regenerated and includes the salt at a second salt concentration by weight, the second salt concentration being larger than the first salt concentration.

21. The method of claim 20 , wherein the predetermined temperature is at least about 65° F. and the predetermined humidity is no more than about 0.012 kg of water content per kg of gas.

22. The method of claim 20 , wherein the second salt concentration is at least 1% greater than the first salt concentration.

23. The method of claim 20 , wherein the first mass flow rate is at least about 20 times the second mass flow rate.

24. A method of regenerating a liquid desiccant with a desorber, the desorber including a housing defining an interior volume, and a distributor component including a conduit and an array of emitters disposed along the conduit, the method comprising:

directing a gas at a first mass flow rate having a predetermined temperature and humidity across a media bed disposed within the interior volume of the housing;

receiving the liquid desiccant at the conduit, the liquid desiccant including water and a salt at a first salt concentration by weight;

dispensing, through each emitter of the array of emitters, the liquid desiccant to the media bed at a second mass flow rate such that the liquid desiccant wets the media bed and water is transferred from the liquid desiccant to the gas; and

after the dispensing, directing the liquid desiccant out of the housing via an outlet port,

wherein (a) the first mass flow rate is selected so that when the water is transferred to the gas with the liquid desiccant dispensed at the second mass flow rate, the liquid desiccant at the outlet port becomes regenerated and includes the salt at a second salt concentration by weight, the second salt concentration being larger than the first salt concentration, and (b), the first mass flow rate is at least 20 times the second mass flow rate.

25. The method of claim 24 , wherein the predetermined temperature is at least about 85° F. and the predetermined humidity is no more than about 0.025 kg of water content per kg of gas.

26. The method of claim 24 , wherein each emitter from the array of emitters includes:

a casing defining an interior volume;

an inlet orifice disposed on the casing and configured to fluidically couple the conduit to the interior volume; and

an outlet orifice disposed on the casing and configured to dispense the liquid desiccant to the media bed at the second mass flow rate,

wherein a pressure drop between the inlet orifice and the outlet orifice of each emitter from the array of emitters being at least equal to a pressure drop across the conduit.

27. The method of claim 26 , wherein the pressure drop between the inlet orifice and the outlet orifice of each emitter from the array of emitters is at least three times a pressure drop across the conduit.

28. A method of regenerating a liquid desiccant with a desorber, the desorber including a housing defining an interior volume, and a distributor component including a conduit and an array of emitters disposed along the conduit, the distributor component directly coupled to an outlet port of an absorber, the method comprising:

directing a gas at a first mass flow rate having a predetermined temperature and humidity across a media bed disposed within the interior volume of the housing;

receiving, via the outlet port of the absorber, the liquid desiccant at the conduit, the liquid desiccant including water and a salt at a first salt concentration by weight;

dispensing, through each emitter of the array of emitters, the liquid desiccant to the media bed at a second mass flow rate such that the liquid desiccant wets the media bed and water is transferred from the liquid desiccant to the gas; and

after the dispensing, directing the liquid desiccant out of the housing via an outlet port,

wherein the first mass flow rate is selected so that when the water is transferred to the gas with the liquid desiccant dispensed at the second mass flow rate, the liquid desiccant at the outlet port becomes regenerated and includes the salt at a second salt concentration by weight, the second salt concentration being larger than the first salt concentration.

29. The method of claim 28 , wherein each emitter from the array of emitters includes:

a casing defining an interior volume;

an inlet orifice disposed on the casing and configured to fluidically couple the conduit to the interior volume; and

an outlet orifice disposed on the casing and configured to dispense the liquid desiccant to the media bed at the second mass flow rate,

wherein a pressure drop between the inlet orifice and the outlet orifice of each emitter from the array of emitters being at least equal to a pressure drop across the conduit.

30. The method of claim 28 , wherein the conduit of the distributor component is disposed within the desorber according to a pattern including at least one of an s-shaped pattern, a spiral pattern, a wave-like pattern, or a concentric circles pattern.

31. The method of claim 28 , wherein the receiving includes receiving the liquid desiccant at the conduit from the absorber without entering any storage tank after exiting the absorber.

Assignments (2)
SECURITY INTEREST Recorded Sep 9, 2026
From: MOJAVE ENERGY SYSTEMS, INC.
To: CELTIC BANK CORPORATION
Reel/Frame 075957/0743 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 8, 2024
From: FARESE, PHILIP; ELLMAN, RACHEL; TOIVOLA, KRISTOPHER
To: MOJAVE ENERGY SYSTEMS, INC.
Reel/Frame 068838/0379 →
Continuity (3)
Continuation PCTUS2024023423 · Apr 5, 2024
Provisional Application 63457984 · Apr 7, 2023
Related Publication 20240337393A1 · Oct 10, 2024
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