Tube-in-Tube Ionic Liquid Heat Exchanger Employing a Selectively Permeable Tube

Bamdad Bahar (Inventor), Harish Opradishta (Inventor), Jacob Zerby (Inventor), Jason Woods (Inventor)

Research output: Patent


A tube-in-tube heat exchanger utilizes a selectively permeable tube having a selective permeable layer to allow the refrigerant to transfer into an ionic liquid to generate heating or cooling. The ionic liquid then provides heating or cooling to a heat transfer fluid through a non-permeable layer or tube. The system may be configured as a shell and tube design, with the third fluid free to flow on the outside of the shell, or as a shell and tube-in-tube, with a central tube containing a first liquid, a second tube containing a second liquid, and an outer shell containing the third liquid. The selectively permeable tube may include an anion or cation selectively permeable layer and this layer may be supported by a support layer or tube.
Original languageAmerican English
Patent number11,454,458 B1
Filing date27/09/22
StatePublished - 2022

NREL Publication Number

  • NREL/PT-5500-84302


  • perfluorosulfonic acid polymer
  • selectively permeable layer
  • shell and tube exchanger design


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