公开(公告)号：US20190137198A1

公开(公告)日：2019-05-09

申请号：US16236977

申请日：2018-12-31

Applicant: HAMILTON SUNDSTRAND CORPORATION

Inventor： Abbas A. Alahyari ,  Miad Yazdani ,  Craig R. Walker

IPC: F28F13/04 ,  F28F17/00 ,  F28F19/02 ,  F28D1/04 ,  F28F13/16 ,  F28F27/00 ,  F28B9/08

CPC classification number: F28F13/04 ,  F25B21/02 ,  F28B9/08 ,  F28D1/04 ,  F28F13/16 ,  F28F17/00 ,  F28F17/005 ,  F28F19/02 ,  F28F27/00 ,  F28F2245/00 ,  F28F2245/04

Abstract: A method of operating a heat exchanger is disclosed in which an electric field is applied to a hydrophobic surface having condensed water droplets thereon to reduce a contact angle between the individual droplet surfaces and the hydrophobic surface, and to increase droplet surface energy to a second surface energy level. The electric field is removed to increase the contact angle between the individual droplet surfaces and the hydrophobic surface, and to reduce droplet surface energy to a third surface energy level. The third surface energy level is greater than the first surface energy level and greater than a surface energy level for a free droplet. A portion of the droplet surface energy is converted to kinetic energy to detach droplets from the hydrophobic surface. The detached droplets are removed from the heat rejection side fluid flow path.

公开(公告)号：US20170370660A1

公开(公告)日：2017-12-28

申请号：US15631657

申请日：2017-06-23

Applicant: HAMILTON SUNDSTRAND CORPORATION

Inventor： Abbas A. Alahyari ,  Miad Yazdani ,  Craig R. Walker

IPC: F28F13/04 ,  F28B9/08 ,  F28F13/16 ,  F25B21/02

CPC classification number: F28F13/04 ,  F25B21/02 ,  F28B9/08 ,  F28D1/04 ,  F28F13/16 ,  F28F17/00 ,  F28F17/005 ,  F28F19/02 ,  F28F27/00 ,  F28F2245/00 ,  F28F2245/04

Abstract: A method of operating a heat exchanger is disclosed in which an electric field is applied to a hydrophobic surface having condensed water droplets thereon to reduce a contact angle between the individual droplet surfaces and the hydrophobic surface, and to increase droplet surface energy to a second surface energy level. The electric field is removed to increase the contact angle between the individual droplet surfaces and the hydrophobic surface, and to reduce droplet surface energy to a third surface energy level. The third surface energy level is greater than the first surface energy level and greater than a surface energy level for a free droplet. A portion of the droplet surface energy is converted to kinetic energy to detach droplets from the hydrophobic surface. The detached droplets are removed from the heat rejection side fluid flow path.

公开(公告)号：US20180356169A1

公开(公告)日：2018-12-13

申请号：US15620433

申请日：2017-06-12

Applicant: Hamilton Sundstrand Corporation

Inventor： Abbas A. Alahyari ,  Craig R. Walker ,  Scott Alan Eastman ,  Catherine Thibaud

IPC: F28F21/06 ,  F28D1/053 ,  F28F1/12 ,  F28F1/32

Abstract: A heat exchanger includes a metal tube and a composite polymer fin in thermal contact with the metal tube. The fin is formed of a polymer and a thermally conductive filler such that the fin has a thermal conductivity greater than or equal to 0.5 Watts per meter Kelvin.

公开(公告)号：US10767940B2

公开(公告)日：2020-09-08

申请号：US16236977

申请日：2018-12-31

Applicant: HAMILTON SUNDSTRAND CORPORATION

Inventor： Abbas A. Alahyari ,  Miad Yazdani ,  Craig R. Walker

IPC: F28F13/04 ,  F28B9/08 ,  F28D1/04 ,  F28F13/16 ,  F28F17/00 ,  F28F19/02 ,  F28F27/00 ,  F25B21/02

Abstract: A method of operating a heat exchanger is disclosed in which an electric field is applied to a hydrophobic surface having condensed water droplets thereon to reduce a contact angle between the individual droplet surfaces and the hydrophobic surface, and to increase droplet surface energy to a second surface energy level. The electric field is removed to increase the contact angle between the individual droplet surfaces and the hydrophobic surface, and to reduce droplet surface energy to a third surface energy level. The third surface energy level is greater than the first surface energy level and greater than a surface energy level for a free droplet. A portion of the droplet surface energy is converted to kinetic energy to detach droplets from the hydrophobic surface. The detached droplets are removed from the heat rejection side fluid flow path.

公开(公告)号：US10197342B2

公开(公告)日：2019-02-05

申请号：US15631657

申请日：2017-06-23

Applicant: HAMILTON SUNDSTRAND CORPORATION

Inventor： Abbas A. Alahyari ,  Miad Yazdani ,  Craig R. Walker

IPC: F28F13/04 ,  F28F13/16 ,  F28B9/08 ,  F25B21/02 ,  F28F17/00 ,  F28F19/02 ,  F28F27/00 ,  F28D1/04

Abstract: A method of operating a heat exchanger is disclosed in which an electric field is applied to a hydrophobic surface having condensed water droplets thereon to reduce a contact angle between the individual droplet surfaces and the hydrophobic surface, and to increase droplet surface energy to a second surface energy level. The electric field is removed to increase the contact angle between the individual droplet surfaces and the hydrophobic surface, and to reduce droplet surface energy to a third surface energy level. The third surface energy level is greater than the first surface energy level and greater than a surface energy level for a free droplet. A portion of the droplet surface energy is converted to kinetic energy to detach droplets from the hydrophobic surface. The detached droplets are removed from the heat rejection side fluid flow path.

公开(公告)号：US10704846B2

公开(公告)日：2020-07-07

申请号：US15620433

申请日：2017-06-12

Applicant: Hamilton Sundstrand Corporation

Inventor： Abbas A. Alahyari ,  Craig R. Walker ,  Scott Alan Eastman ,  Catherine Thibaud

IPC: F28F21/06 ,  F28D1/053 ,  F28F1/12 ,  F28F1/32 ,  F28F21/08 ,  F28F13/18 ,  F28D7/00 ,  F22B37/10 ,  F28F3/02

Abstract: A heat exchanger includes a metal tube and a composite polymer fin in thermal contact with the metal tube. The fin is formed of a polymer and a thermally conductive filler such that the fin has a thermal conductivity greater than or equal to 0.5 Watts per meter Kelvin.