Patents by Inventor Zissis A. Dardas
Zissis A. Dardas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20150375869Abstract: A method of controlling cooling in an aircraft system includes endothermically cracking a fuel to increase its cooling capacity using a catalyst that includes at least one transition metal compound of at least one of carbides, nitrides, oxynitrides, oxycarbonitrides, oxycarbides, phosphides, and combinations, and the transition metal includes at least one of zirconium, hafnium, tantalum, niobium, molybdenum, tungsten, platinum, palladium, rhodium, iridium, ruthenium, osmium, rhenium, and combinations thereof. The cracked fuel is used to cool a heat source that includes an aircraft component.Type: ApplicationFiled: September 3, 2015Publication date: December 31, 2015Inventors: Thomas Henry Vanderspurt, Zissis A. Dardas
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Patent number: 9186622Abstract: A method of separating oxygen from nitrogen involves delivering air to a first side of a membrane comprising a polymer support and a layer of zeolite nanosheet particles with thickness of 2 nm to 10 nm and mean diameter of 5 nm to 5000 nm. The delivered air provides a pressure differential between opposite sides of the membrane, thus causing oxygen in the hollow core to diffuse through the polymer support and the zeolite nanosheet layer to the second side of the membrane. The preferential diffusion of oxygen (compared to diffusion of nitrogen) through the membrane produces nitrogen-enriched air on the first side of the membrane and oxygen-enriched air on the second side of the membrane.Type: GrantFiled: June 11, 2014Date of Patent: November 17, 2015Assignee: Hamilton Sundstrand CorporationInventors: Rajiv Ranjan, Zissis A. Dardas
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Patent number: 9150300Abstract: A method of controlling cooling in an aircraft system includes providing a fluid having a cooling capacity to cool a heat source, and selectively endothermically cracking the fluid to increase the cooling capacity.Type: GrantFiled: August 5, 2011Date of Patent: October 6, 2015Assignee: United Technologies CorporationInventors: Thomas Henry Vanderspurt, Zissis A. Dardas
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Patent number: 9118054Abstract: A power system for an aircraft includes a solid oxide fuel cell system which generates electric power for the aircraft and an exhaust stream; and a heat exchanger for transferring heat from the exhaust stream of the solid oxide fuel cell to a heat requiring system or component of the aircraft. The heat can be transferred to fuel for the primary engine of the aircraft. Further, the same fuel can be used to power both the primary engine and the SOFC. A heat exchanger is positioned to cool reformate before feeding to the fuel cell. SOFC exhaust is treated and used as inerting gas. Finally, oxidant to the SOFC can be obtained from the aircraft cabin, or exterior, or both.Type: GrantFiled: November 20, 2012Date of Patent: August 25, 2015Assignee: Hamilton Sundstrand CorporationInventors: Mallika Gummalla, Jean Yamanis, Benoit Olsommer, Zissis Dardas, Robert Bayt, Hari Srinivasan, Arindam Dasgupta, Larry Hardin
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Publication number: 20140264967Abstract: A contactor configured for use in a dehumidification system is provided including a plurality of contact modules. Each contact module has a porous sidewall that defines an internal space through which a hygroscopic material flows. Adjacent contact modules are fluidly coupled to form a multipass flow path for the hygroscopic material through the contactor.Type: ApplicationFiled: January 15, 2014Publication date: September 18, 2014Applicant: Carrier CorporationInventors: Sherif Kandil, Kenneth David Smith, Zidu Ma, Rajiv Ranjan, Frederick J. Cogswell, Zissis A. Dardas, Bart A. Van Hassel
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Patent number: 8795588Abstract: A contaminant removal system is disclosed for selectively removing contaminants from a fluid stream. The contaminant removal system has a catalytic reactor of the type that is susceptible to deactivating agents, and is configured to remove contaminants from a fluid stream. The contaminant removal system has a first adsorbent device positioned upstream, with respect to the fluid stream direction, of the catalytic reactor, that is configured to chemically bind with and remove the deactivating agents from the fluid stream. The contaminant removal system can have a second adsorbent device positioned downstream, with respect to the fluid stream direction, of the catalytic reactor. The second adsorbent device is configured to remove undesirable byproducts that may be generated when the catalytic reactor removes contaminants from the fluid stream.Type: GrantFiled: May 31, 2007Date of Patent: August 5, 2014Assignee: Carrier CorporationInventors: Zissis A. Dardas, Norberto O. Lemcoff, Stephen O. Hay, Timothy N. Obee, Foster P. Lamm, Albert T. Pucino, Joseph J. Sangiovanni, Thomas Henry Vanderspurt, Wayde R. Schmidt, Treese Hugener-Campbell, Leland G. Brandes
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Publication number: 20140053570Abstract: A method for reducing emissions from an engine includes generating a light hydrocarbon fuel fraction and combusting the light hydrocarbon fuel fraction in place of the fuel. The light hydrocarbon fuel fraction is generated by heating the fuel and flowing the fuel through a plurality of hollow fiber superhydrophobic membranes in a membrane module. Each hollow superhydrophobic membrane comprises a porous support and a superhydrophobic layer free of pores that extend from one side of the superhydrophobic layer to the other. Vapor from the fuel permeates the superhydrophobic membranes and enters a distillate collection chamber, producing a distilled fuel in the distillate collection chamber and a residual fuel within the hollow fiber superhydrophobic membranes. The residual fuel is removed from the membrane module and cooled to produce a cooled residual fuel.Type: ApplicationFiled: November 5, 2013Publication date: February 27, 2014Applicant: United Technologies CorporationInventors: Zidu Ma, Joseph J. Sangiovanni, Zissis A. Dardas, Meredith B. Colket, III
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Patent number: 8603300Abstract: A method for fractionating a fuel includes heating the fuel and flowing it through hollow superhydrophobic membranes in a membrane module. Vapor from the fuel permeates the hydrophobic membranes and enters a distillate collection chamber, producing distilled fuel and residual fuel. The residual fuel is removed from the module and cooled. The cooled residual fuel is flowed through hollow tubes in the module and the distilled fuel is removed from the distillate collection chamber. Burning the distilled fuel reduces engine emissions. A fuel fractionation system includes a distillate collection chamber, hollow superhydrophobic membranes, hollow tubes and a distillate outlet. The hollow superhydrophobic membranes receive heated fuel and allow vapor from the heated fuel to permeate the membranes and enter the distillate collection chamber. The hollow tubes receive cooled residual fuel and are positioned to allow vapor in the distillate collection chamber to condense on outer surfaces of the hollow tubes.Type: GrantFiled: September 15, 2011Date of Patent: December 10, 2013Assignee: United Technologies CorporationInventors: Zidu Ma, Joseph J. Sangiovanni, Zissis A. Dardas, Meredith B. Colket, III
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Patent number: 8513157Abstract: The present disclosure relates to a fluid purification device that has a deactivation resistant photocatalyst having nanocrystallites of less than 14 nanometers (nm) in diameter with at least 200 m2 surface area/cm3 of skeletal volume in cylindrical pores of 5 nm in diameter or larger, with the mode of the pore size distribution 10 nm or more.Type: GrantFiled: June 30, 2011Date of Patent: August 20, 2013Assignee: Carrier CorporationInventors: Thomas Henry Vanderspurt, Treese Hugener-Campbell, Norberto O. Lemcoff, Stephen O. Hay, Wayde R. Schmidt, Joseph J. Sangiovanni, Zissis A. Dardas, Di Wei
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Publication number: 20130071793Abstract: A method for fractionating a fuel includes heating the fuel and flowing it through hollow superhydrophobic membranes in a membrane module. Vapor from the fuel permeates the hydrophobic membranes and enters a distillate collection chamber, producing distilled fuel and residual fuel. The residual fuel is removed from the module and cooled. The cooled residual fuel is flowed through hollow tubes in the module and the distilled fuel is removed from the distillate collection chamber. Burning the distilled fuel reduces engine emissions. A fuel fractionation system includes a distillate collection chamber, hollow superhydrophobic membranes, hollow tubes and a distillate outlet. The hollow superhydrophobic membranes receive heated fuel and allow vapor from the heated fuel to permeate the membranes and enter the distillate collection chamber. The hollow tubes receive cooled residual fuel and are positioned to allow vapor in the distillate collection chamber to condense on outer surfaces of the hollow tubes.Type: ApplicationFiled: September 15, 2011Publication date: March 21, 2013Applicant: UNITED TECHNOLOGIES CORPORATIONInventors: Zidu Ma, Joseph J. Sangiovanni, Zissis A. Dardas, Meredith B. Colket, III
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Patent number: 8394552Abstract: A power system for an aircraft includes a solid oxide fuel cell system which generates electric power for the aircraft and an exhaust stream; and a heat exchanger for transferring heat from the exhaust stream of the solid oxide fuel cell to a heat requiring system or component of the aircraft. The heat can be transferred to fuel for the primary engine of the aircraft. Further, the same fuel can be used to power both the primary engine and the SOFC. A heat exchanger is positioned to cool reformate before feeding to the fuel cell. SOFC exhaust is treated and used as inerting gas. Finally, oxidant to the SOFC can be obtained from the aircraft cabin, or exterior, or both.Type: GrantFiled: September 19, 2006Date of Patent: March 12, 2013Assignee: Hamilton Sundstrand CorporationInventors: Mallika Gummalla, Jean Yamanis, Benoit Olsommer, Zissis Dardas, Robert Bayt, Hari Srinivasan, Arindam Dasgupta, Larry Hardin
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Publication number: 20120003134Abstract: The present disclosure relates to a fluid purification device that has a deactivation resistant photocatalyst having nanocrystallites of less than 14 nanometers (nm) in diameter with at least 200 m2 surface area/cm3 of skeletal volume in cylindrical pores of 5 nm in diameter or larger, with the mode of the pore size distribution 10 nm or more.Type: ApplicationFiled: June 30, 2011Publication date: January 5, 2012Applicant: CARRIER CORPORATIONInventors: Thomas Henry Vanderspurt, Treese Hugener-Campbell, Norberto O. Lemcoff, Stephen O. Hay, Wayde R. Schmidt, Joseph J. Sangiovanni, Zissis A. Dardas, Di Wei
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Patent number: 8070860Abstract: An H2-permeable membrane system (117) comprises an electroless-deposited plating (115) of Pd or Pd alloy on a porous support (110, 110?). The Pd plating comprises face-centered cubic crystals cumulatively having a morphology of hexagonal platelets. The permeability to H2 of the membrane plating (115) on the porous support is significantly enhanced, being at least greater than about 1.3×10?8 mol·m?1·s?·Pa?0.5 at 350° C., and even greater than about 3.4×10?8 mol·m?1·s?1·Pa?0.5. The porous support (110, 110?) may be stainless steel (1100 and include a thin ceramic interlayer (110?) on which the Pd is plated. The method of providing the electroless-deposited plating includes preheating a Pd electroless plating solution to near a plating temperature substantially greater than room temperature, e.g. 60° C., prior to plating.Type: GrantFiled: September 28, 2006Date of Patent: December 6, 2011Assignee: United Technologies CorporationInventors: Thomas Henry Vanderspurt, Ying She, Zissis Dardas, Craig Walker, James D. MacLeod
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Publication number: 20110290457Abstract: A method of controlling cooling in an aircraft system includes providing a fluid having a cooling capacity to cool a heat source, and selectively endothermically cracking the fluid to increase the cooling capacity.Type: ApplicationFiled: August 5, 2011Publication date: December 1, 2011Inventors: Thomas Henry Vanderspurt, Zissis A. Dardas
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Patent number: 8015823Abstract: An aircraft system includes a heat source and a passage near the heat source for carrying fluid having a cooling capacity to cool the heat source. The passage includes a catalyst that endothermically cracks the fluid to increase the cooling capacity.Type: GrantFiled: August 21, 2006Date of Patent: September 13, 2011Assignee: United Technologies CorporationInventors: Thomas Henry Vanderspurt, Zissis A. Dardas
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Publication number: 20110117002Abstract: A contaminant removal system for selectively removing contaminants from a fluid stream. The contaminant removal system has a catalytic reactor of the type that is susceptible to deactivating agents. The catalytic reactor is configured to remove contaminants from a fluid stream. The contaminant removal system has a first adsorbent device positioned upstream, with respect to the fluid stream direction, of the catalytic reactor, that is configured to remove the deactivating agents from the fluid stream. The contaminant removal system has a second adsorbent device positioned downstream, with respect to the fluid stream direction, of the catalytic reactor. The second adsorbent device is configured to remove undesirable byproducts that may be generated when the catalytic reactor removes contaminants from the fluid stream.Type: ApplicationFiled: May 31, 2007Publication date: May 19, 2011Applicant: CARRIER CORPORATIONInventors: Zissis A. Dardas, Norberto O. Lemcoff, Susan D. Brandes, Leland G. Brandes, Stephen O. Hay, Timothy N. Obee, Foster P. Lamm, Albert T. Pucino, Joseph J. Sangiovanni, Thomas Henry Vanderspurt, Wayde R. Schmidt, Treese Hugener-Campbell
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Publication number: 20100323250Abstract: The system (40) provides for directing a hydrogen-rich reformate fuel stream from a reformer (42) through a sulfur removal bed (50) having a sulfur removal material consisting of manganese oxide secured to a support material. A regeneration fluid is intermittently directed through the bed (50) to remove sulfur and regenerate the bed. A regeneration-produced sulfur containing stream is then directed into a sulfur capture bed (54) having a heat source (60) and a flush inlet (62) and flush outlet (64). The sulfur capture bed (54) includes sulfur capture material consisting of nickel oxysulfide catalyst supported on silicon carbide. When the heat source (60) heats the sulfur capture bed (54) a flush liquid passed through the flush inlet (62), capture bed (54), and flush outlet (64) to transport elemental sulfur to a sulfur storage container (50).Type: ApplicationFiled: April 1, 2008Publication date: December 23, 2010Inventors: Thomas H. Vanderspurt, Zissis Dardas, Xia Tang, Caroline A. Newman, Ying She
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Publication number: 20100104903Abstract: The fuel processing system of the present invention supplies a flow of H2-rich reformate to a water gas shift membrane reactor, comprising a water gas shift reaction region and a permeate region, separated by an H2-separation membrane H2 formed over a catalyst in the reaction region selectively passes through the H2-separation membrane to the permeate region for delivery to a use point (such as the fuel cell of a fuel cell power plant) A sweep gas, preferably steam, removes the H2 from the permeate region The direction of sweep gas flow relative to the reformate flow is controlled for H2-separation performance and is used to determine the loading of the catalyst in the reaction region Coolant, thermal and/or pressure control subsystems of the fuel cell power plant may be integrated with the fuel processing systemType: ApplicationFiled: December 23, 2005Publication date: April 29, 2010Inventors: Mallika Gummalla, Thomas Henry Vanderspurt, Ying She, Zissis Dardas, Benoit Olsommer
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Publication number: 20100005969Abstract: An H2-permeable membrane system (117) comprises an electroless-deposited plating (115) of Pd or Pd alloy on a porous support (110, 110?). The Pd plating comprises face-centered cubic crystals cumulatively having a morphology of hexagonal platelets. The permeability to H2 of the membrane plating (115) on the porous support is significantly enhanced, being at least greater than about 1.3×10?8 mol·m?1·s?·Pa?0.5 at 350° C., and even greater than about 3.4×10?8 mol·m?1·s?1·Pa?0.5. The porous support (110, 110?) may be stainless steel (1100 and include a thin ceramic interlayer (110?) on which the Pd is plated. The method of providing the electroless-deposited plating includes preheating a Pd electroless plating solution to near a plating temperature substantially greater than room temperature, e.g. 60° C., prior to plating.Type: ApplicationFiled: September 28, 2006Publication date: January 14, 2010Applicant: UTC Power CorporationInventors: Thomas Henry Vanderspurt, Ying She, Zissis Dardas, Craig Walker, James D. MacLeod
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Patent number: 7612011Abstract: A homogeneous ceria-based mixed-metal oxide, useful as a catalyst support, a co-catalyst and/or a getter has a relatively large surface area per weight, typically exceeding 150 m2/g, a structure of nanocrystallites having diameters of less than 4 nm, and including pores larger than the nanocrystallites and having diameters in the range of 4 to about 9 nm. The ratio of pore volumes, VP, to skeletal structure volumes, VS, is typically less than about 2.5, and the surface area per unit volume of the oxide material is greater than 320 m2/cm3, for low internal mass transfer resistance and large effective surface area for reaction activity. The mixed metal oxide is ceria-based, includes Zr and or Hf, and is made by a novel co-precipitation process. A highly dispersed catalyst metal, typically a noble metal such as Pt, may be loaded on to the mixed metal oxide support from a catalyst metal-containing solution following a selected acid surface treatment of the oxide support.Type: GrantFiled: November 28, 2006Date of Patent: November 3, 2009Assignee: UTC Power CorporationInventors: Thomas Henry Vanderspurt, Fabienne Wijzen, Xia Tang, Miriam P. Leffler, Rhonda R. Willigan, Caroline A. Newman, Rakesh Radhakrishnan, Fangxia Feng, Bruce Leon Laube, Zissis Dardas, Susanne M. Opalka, Ying She