A water separator comprises an axially extending airflow passage, an airflow mixer, a plurality of electric plates of alternating charge, and a mechanical separator. The airflow mixer, the plurality of electric plates, and the mechanical separator are disposed within the airflow passage. The airflow
A water separator comprises an axially extending airflow passage, an airflow mixer, a plurality of electric plates of alternating charge, and a mechanical separator. The airflow mixer, the plurality of electric plates, and the mechanical separator are disposed within the airflow passage. The airflow mixer imparts a non-axial flow component on airflow through the airflow passage. The electric plates are situated downstream of the mixer, and create an electric field region within the airflow passage. The mechanical separator is situated at or downstream of the electric field region, and is disposed to separate water droplets from air.
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1. A water separator comprises: an axially extending airflow passage;an airflow mixer disposed within the airflow passage, and configured to impart a non-axial flow component on airflow through the airflow passage;a plurality of electric plates of alternating charge, disposed within the airflow pass
1. A water separator comprises: an axially extending airflow passage;an airflow mixer disposed within the airflow passage, and configured to impart a non-axial flow component on airflow through the airflow passage;a plurality of electric plates of alternating charge, disposed within the airflow passage downstream of the airflow mixer so as to create an electric field region within the airflow passage; anda mechanical separator disposed within the airflow passage, downstream of the airflow mixer and axially at least partially within the electric field region, disposed to separate water droplets from air, wherein the mechanical separator is a swirler with a plurality of circumferentially distributed flow turning elements disposed to centrifugally separate water droplets from air. 2. The water separator of claim 1, wherein the electric plates are radially distributed annular plates. 3. The water separator of claim 2, wherein the electric plates are radially distributed such that cross-sectionals area between adjacent plates are the same. 4. The water separator of claim 1, wherein the electric plates are radially extending, circumferentially distributed vanes. 5. The water separator of claim 4, wherein the vanes are flow turning elements of the mechanical separator. 6. The water separator of claim 1, wherein the electric plates comprise a first plurality of radially extending, circumferentially distributed plates of alternating charge, and a second plurality of annular, radially distributed plates of alternating charge. 7. The water separator of claim 1, wherein the airflow mixer is a lobed mixer with an annular wave-shaped guide plate having a substantially uniform upstream radius and a downstream radius that varies as a function of circumferential position. 8. A method of separating water from humid air, the method comprising: flowing air axially through an annular air passage;introducing a non-axial flow component to airflow through the annular air passage via a mechanical mixer;polarizing and thereby coalescing water droplets downstream of the mechanical mixer via an electric field region produced by a plurality of plates of alternating electric charge; andmechanically separating coalesced water droplets via a mechanical swirler situated at least partly within the electric field region. 9. The method of claim 8, wherein polarizing water droplets comprises applying constant direct current of alternating sign to adjacent plates among the plurality of plates of alternating electric charge. 10. The method of claim 9, wherein polarizing water droplets comprises applying opposite phase alternating current to adjacent plates among the plurality of plates of alternating electric charge. 11. The method of claim 8, wherein the electric field region is a region of substantially constant electric field as a function of radius. 12. The method of claim 8, wherein the mechanical swirler includes a plurality of turning vanes, at least a subset of which are among the plurality of plates of alternating electric charge that produce the electric field region. 13. The method of claim 8, wherein introducing a non-axial component to airflow through the annular air passage comprises redirecting air via a lobed mixer with an annular wave-shaped guide plate having a substantially uniform upstream radius and a downstream radius that varies as a function of circumferential position. 14. A water separator comprises: an axially extending airflow passage;an airflow mixer disposed within the airflow passage, and configured to impart a non-axial flow component on airflow through the airflow passage;a plurality of electric plates of alternating charge, disposed within the airflow passage downstream of the airflow mixer so as to create an electric field region within the airflow passage, wherein the electric plates are radially extending, circumferentially distributed vanes; anda mechanical separator disposed within the airflow passage, downstream of the airflow mixer and axially at least partially within the electric field region, disposed to separate water droplets from air, wherein the vanes are flow turning elements of the mechanical separator.
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