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公开(公告)号：US20170089611A1
公开(公告)日：2017-03-30
申请号：US15279852
申请日：2016-09-29
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： Jamal S. Yagoobi
CPC classification number: F25B1/10 , F04B17/00 , F04B19/006 , F25B1/00 , F25B31/00 , F28F2250/08 , H02K44/02 , H02K44/04 , H02N11/006
Abstract: An electrohydrodynamic (EHD) pump increases refrigerant flow rate and the resulting pressure in a vapor compression based cooling system for permitting reduced compressor sizes and power demands. The EHD pump disposes electrodes in a liquid path of the refrigerant flow, and increases fluid flow and resulting pressure by an induced liquid flow between a pair of asymmetric electrodes. Voltage applied to these electrodes results in a conduction pumping mechanism associated with heterocharge layers in the vicinity of the electrodes based on disassociation of a neutral electrolyte species in the refrigerant fluid and recombination of the generated ions. The induced flow draws the liquid due to a net fluid flow toward one of the electrodes based on the asymmetry of the electrode pair. Electrodes are disposed on an inner surface of a refrigerant vessel, in communication with an annular liquid film that forms around the inner circumference in two-phase fluid systems.
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公开(公告)号：US20230088399A1
公开(公告)日：2023-03-23
申请号：US17949469
申请日：2022-09-21
Applicant: Worcester Polytechnic Institute Road
Inventor： Jamal S. Yagoobi , Mengqiao Yang
IPC: F26B23/04
Abstract: An electrohydrodynamic (EHD) drying apparatus includes a non-uniform electric field resulting from an electric field source operable for a high potential, and an electric field source operable for a low potential. A power source is connected to the electric field sources for producing the non uniform electric field for inducing dielectrophoresis (DEP) in an article within the uniform electric field. In particular configurations, the applied non-uniform electric field is for separating a vapor phase being formed during drying from the liquid phase. The electric field source defines a polarizer adapted to produce dielectrophoresis, and the electric field induces coupled electrostatics and momentum for disposing liquid towards the high electric field for drying.
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公开(公告)号：US10132527B2
公开(公告)日：2018-11-20
申请号：US15279852
申请日：2016-09-29
Applicant: WORCESTER POLYTECHNIC INSTITUTE
Inventor： Jamal S. Yagoobi
Abstract: An electrohydrodynamic (EHD) pump increases refrigerant flow rate and the resulting pressure in a vapor compression based cooling system for permitting reduced compressor sizes and power demands. The EHD pump disposes electrodes in a liquid path of the refrigerant flow, and increases fluid flow and resulting pressure by an induced liquid flow between a pair of asymmetric electrodes. Voltage applied to these electrodes results in a conduction pumping mechanism associated with heterocharge layers in the vicinity of the electrodes based on disassociation of a neutral electrolyte species in the refrigerant fluid and recombination of the generated ions. The induced flow draws the liquid due to a net fluid flow toward one of the electrodes based on the asymmetry of the electrode pair. Electrodes are disposed on an inner surface of a refrigerant vessel, in communication with an annular liquid film that forms around the inner circumference in two-phase fluid systems.
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Patent Agency Ranking
公开(公告)号：US11872504B2
公开(公告)日：2024-01-16
申请号：US17853152
申请日：2022-06-29
Applicant: Worcester Polytechnic Institute
Inventor： Jamal S. Yagoobi , Mengqiao Yang , Mehrnoush F. Dardashti
CPC classification number: B01D1/18 , B01D1/20 , B01J2/02 , B05B17/0607 , B05B17/0623 , B05B17/0646
Abstract: An atomizing spray dryer employs one or more stages defined by ultrasonic transducers in close proximity to a liquid feed opening forming a path of an atomization flow for producing uniform droplets from a close tolerance with the transducer. The atomization flow exits a gap between the transducer and an outer edge of the opening, such that the passed liquid is responsive to an oscillation of the transducer for forming the droplets. A conical or other suitably shaped transducer engages a substantially round liquid feed opening. Subsequent stages may include a circular, ring, or other suitable shape aligned to receive the atomization flow from a circumference of the conical base, or may also take any suitable shape, preferably to receive droplets directed by the first stage.
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公开(公告)号：US20230001321A1
公开(公告)日：2023-01-05
申请号：US17853152
申请日：2022-06-29
Applicant: Worcester Polytechnic Institute
Inventor： Jamal S. Yagoobi , Mengqiao Yang , Mehrnoosh F. Dardashti
Abstract: An atomizing spray dryer employs one or more stages defined by ultrasonic transducers in close proximity to a liquid feed opening forming a path of an atomization flow for producing uniform droplets from a close tolerance with the transducer. The atomization flow exits a gap between the transducer and an outer edge of the opening, such that the passed liquid is responsive to an oscillation of the transducer for forming the droplets. A conical or other suitably shaped transducer engages a substantially round liquid feed opening. Subsequent stages may include a circular, ring, or other suitable shape aligned to receive the atomization flow from a circumference of the conical base, or may also take any suitable shape, preferably to receive droplets directed by the first stage.
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公开(公告)号：US12209806B2
公开(公告)日：2025-01-28
申请号：US18103794
申请日：2023-01-31
Applicant: Worcester Polytechnic Institute
Inventor： Jamal S. Yagoobi , Mengqiao Yang , Mehrnoush F. Dardashti
Abstract: An atomizing spray dryer employs one or more stages defined by ultrasonic transducers in close proximity to a liquid feed opening forming a path of an atomization flow for producing uniform droplets from a close tolerance with the transducer. The atomization flow exits a gap between the transducer and an outer edge of the opening, such that the passed liquid is responsive to an oscillation of the transducer for forming the droplets. A conical or other suitably shaped transducer engages a substantially round liquid feed opening. Subsequent stages may include a circular, ring, or other suitable shape aligned to receive the atomization flow from a circumference of the conical base, or may also take any suitable shape, preferably to receive droplets directed by the first stage.
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公开(公告)号：US20230175774A1
公开(公告)日：2023-06-08
申请号：US18103794
申请日：2023-01-31
Applicant: Worcester Polytechnic Institute
Inventor： Jamal S. Yagoobi , Mengqiao Yang , Mehrnoosh F. Dardashti
CPC classification number: F26B3/12 , F26B25/002 , F26B2200/18
Abstract: An atomizing spray dryer employs one or more stages defined by ultrasonic transducers in close proximity to a liquid feed opening forming a path of an atomization flow for producing uniform droplets from a close tolerance with the transducer. The atomization flow exits a gap between the transducer and an outer edge of the opening, such that the passed liquid is responsive to an oscillation of the transducer for forming the droplets. A conical or other suitably shaped transducer engages a substantially round liquid feed opening. Subsequent stages may include a circular, ring, or other suitable shape aligned to receive the atomization flow from a circumference of the conical base, or may also take any suitable shape, preferably to receive droplets directed by the first stage.
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公开(公告)号：US20230132688A1
公开(公告)日：2023-05-04
申请号：US17975437
申请日：2022-10-27
Applicant: Worcester Polytechnic Institute
Inventor： Jamal S. Yagoobi
Abstract: A combined electrohydrodynamic (EHD) and dielectrophoretic (DEP) cooling approach for a processor or similar electronics in a zero gravity environment is beneficial in space exploration. An EHD pumping mechanism is defined by an array of alternating, polarized electrodes surrounding a heat sink coupled to the processor for heat exchange, such as a thermally conductive layer or coating. The array may be circular, rectangular, or any suitable geometry, generally guided by a shape of the heat sink/processor. Cooling fluid is drawn or pumped towards the heat sink by EHD electrodes, and a dielectrophoretic (DEP) electrode disposed above the center of the heat sink extracts the generated vapor bubbles away from the heated surface with a diverging electrical field. One configuration calls for a radial arrangement of EHD electrodes drawing the cooling fluid towards a centrally located heat sink.
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