Abstract: A bipolar plate for a fuel cell, a fuel cell, and a method of designing a bipolar plate for a fuel cell having a hybrid flow field structure that includes a plurality of parallel feed flow channels fluidically connected to an inlet bipolar plate region, a plurality of parallel exit flow channels fluidically connected to an outlet bipolar plate region, and an interwoven pattern formed by a plurality of simplified periodic array flow field structure generated based on flow patterns generated by homogenized anisotropic porous media optimization. The flow field structure enhances fuel cell performance by facilitating lower pressure drop via minimized fluid flow resistance, and removal of accumulated water in the oxygen channel and the gas diffusion layer (GDL) under the ribs of the bipolar plate.

Abstract: A louvre system controls a flow of cooling air to a heat-generating element mounting inside a wing of an aircraft. The louvre system includes a louvre operably connected to the wing and structured to be rotatable to control airflow through an air intake of the wing into an interior of the wing. A louvre actuation mechanism is operably connected to the louvre and configured to control rotation of the louvre. A memory is communicably coupled to a processor and stores a louvre control module configured to autonomously control operation of the louvre actuation mechanism to control rotation of the louvre responsive to a temperature of a heat-generating element mounted in the wing interior.

Abstract: A two-phase cold plate that includes a manifold body having a fluid inlet and a fluid outlet each fluidly coupled to a fluid pathway housed within the manifold body and a vaporization structure housed within the manifold body such that the fluid pathway is disposed over the vaporization structure. The vaporization structure includes a cavity cover, a porous surface, a vapor cavity disposed between the cavity cover and the porous surface, and one or more porous feeding posts extending between the cavity cover and the porous surface. The one or more porous feeding posts fluidly coupled the fluid pathway with the porous surface of the vaporization structure and the porous surface includes a plurality of nucleation sites configured to induce vaporization of a cooling fluid and facilitate vapor flow into the vapor cavity of the vaporization structure.

Abstract: A method, computer program product, and bipolar plate structure for a fuel cell stack inside a polymer-electrolyte-membrane (PEM) fuel cell stack. The bipolar plate structure may be created, wherein creating the bipolar plate structure may include forming a z-shaped pattern for a plurality of hydrogen flow channels. Creating the bipolar plate structure may include forming a z-shaped pattern for a plurality of air flow channels. Creating the bipolar plate structure may include forming an x-shaped crossing pattern for a plurality of coolant flow channels.

Abstract: An inductor includes a magnetic core composed of a magnetic material having variable permeability characteristics based on at least one of design parameters or operational parameters of the inductor that includes one or more air gaps. A coil is wound through the one or more air gaps and is configured to be excited by an electric current.

Abstract: The present disclosure is directed to systems and methods for cooling electronic devices. The system includes a capillary cooler assembly comprising a housing, a plurality of feeding tubes within the housing, a wick within the housing, and one or more vapor outlets, a fluid feed line fluidly coupled to the plurality of feeding tubes, a fluid bypass line fluidly coupled to the fluid feed line, a fluid bypass valve fluidly coupled to the fluid feed line and the fluid bypass line, wherein the fluid bypass valve is selectively operable between at least two positions that control a flow of cooling fluid through the fluid bypass line, a vapor line fluidly coupled to the one or more vapor outlets, a condenser fluidly coupled to the fluid bypass line, the vapor line, and the fluid feed line, and a pump fluidly coupled to the condenser and the fluid feed line.

Abstract: The present disclosure is directed to systems and methods for cooling electronic devices. The system comprises a pump, a distribution manifold fluidly coupled to the pump, one or more capillary coolers fluidly coupled to the distribution manifold, one or more electronic devices coupled to the one or more capillary coolers, a vapor line fluidly coupled to the one or more capillary coolers, and a condenser comprising an inlet and an outlet, wherein the inlet is fluidly coupled to the vapor line and the outlet is fluidly coupled to the pump.

Abstract: Systems, methods, and other embodiments described herein relate to dynamic optical beam power for a light detection and ranging system. In one embodiment, a method includes detecting a first object using an optical source activated with a first power level prior to determining to reduce the first power level in response to a first detected vehicle condition. A second power level is then selected to detect a second object using the optical source.

Abstract: Systems, methods, and other embodiments described herein relate to cooling a circuit package. In one embodiment, a light detection and ranging system has a first circuit separated from a second circuit by an airflow pathway. An access mechanism may be positioned in the airflow pathway and configured to divert airflow around the first circuit and toward the second circuit via the airflow pathway until a package condition is encountered that triggers the access switch to a second cooling position allowing airflow to flow to the airflow pathway unimpeded.

Abstract: A bipolar plate for a fuel cell, a fuel cell, and a method of designing a bipolar plate for a fuel cell having a flow field structure that includes a plurality of Representative Elementary Volumes (REVs) generated based on flow patterns generated by homogenized anisotropic porous media optimization. The flow field structure enhances fuel cell performance by facilitating lower pressure drop via minimized fluid flow resistance, and removal of accumulated water in the oxygen channel and the gas diffusion layer (GDL) under the ribs of the bipolar plate.

Abstract: One or more methods of designing microchannel fluid flow networks in a fuel cell bipolar plate includes executing one or more programs on one or more computing devices having one or more processors to optimize the spatially varying orientations of homogenized anisotropic porous media by iteratively executing a gradient-based algorithm that incorporates objective functions of reaction uniformity and flow resistance, and then generate, in response to the homogenized anisotropic porous media optimization, one or more microchannel fluid flow networks by dehomogenizing the optimized anisotropic porous media.

Abstract: Systems and methods for improving the brightness of a transparent display are disclosed herein. One embodiment collects ambient light using an array of diffraction gratings disposed on an external surface of a building; filters the ambient light to produce filtered ambient light; generates primary-source light using a light-emitting-diode (LED) light source; and injects, into a transparent edge-lit liquid crystal waveguide display deployed in at least a portion of a window of the building, the primary-source light and the filtered ambient light in a color-synchronized manner. The filtered ambient light improves the brightness of the transparent edge-lit liquid crystal waveguide display.

Abstract: A ram chute assembly is provided for directing a flow of cooling air into a hollow wing structure of an aircraft. The ram chute assembly includes a ram chute body defining an interior passage, and an air inlet enabling an airflow from an exterior of the ram chute body into the interior passage. The assembly is structured to be attachable to an exterior of an engine nacelle so as to receive propeller wash air through the air inlet into the interior passage when a propeller of the engine nacelle is rotating. The ram chute assembly is also structured to discharge the propeller wash air in a direction toward an air intake opening formed in an upper surface of a hollow wing structure on which the engine nacelle is mounted.

Abstract: Systems and methods for improving the brightness of a transparent display are disclosed herein. One embodiment collects ambient light using an array of diffraction gratings disposed on an external surface of a building; filters the ambient light to produce filtered ambient light; generates primary-source light using a light-emitting-diode (LED) light source; and injects, into a transparent edge-lit liquid crystal waveguide display deployed in at least a portion of a window of the building, the primary-source light and the filtered ambient light in a color-synchronized manner. The filtered ambient light improves the brightness of the transparent edge-lit liquid crystal waveguide display.

Abstract: Methods, apparatuses and systems to provide for technology to that includes a first power electronics module including a plurality of first transistors that are diagonally offset from each other, and a second power electronics module stacked on the first power electronics module. The second power electronics module includes second transistors that are diagonally offset from each other. The second transistors are staggered relative to the first transistors.

Abstract: A method of decomposing a cured aromatic epoxy resin uses a molten salt bath at less than about 350° C. The molten salt bath includes a plurality of alkali metal hydroxides. The cured aromatic epoxy resin can be in intimate physical contact with a metal or alloy. The cured aromatic epoxy resin can be patterned by a lithographic method. The lithographic method can be multibeam interference lithography to form a three-dimensional photonic crystal template on a conductive substrate for electrodeposition of metal. Contacting the three-dimensional photonic crystal template with the electrodeposited metal with the molten salt bath can form a metal matrix device displaying a periodic pattern that is the inverse of the periodic pattern of the decomposed three-dimensional photonic crystal template.

Abstract: A method to control the density of a three-dimensional photonic crystal template involves changing the irradiation time from at least four laser beams to yield a periodic percolating matrix of mass and voids free of condensed matter from a photoresist composition. The photoresist composition includes a photoinitiator at a concentration where the dose or irradiation is controlled by the irradiation time and is less than the irradiation time that would convert all photoinitiator to initiating species such that the density of the three-dimensional photonic crystal template differs for different irradiation times. A deposition of reflecting or absorbing particles can be patterned on the surface of the photoresist composition to form a template with varying densities above different areas of the substrate.

Abstract: Systems and methods for improving the brightness of a transparent display are disclosed herein. One embodiment collects ambient light using an array of Fresnel lenses disposed on an external surface of a vehicle; collects internal light from the vehicle's headlights; filters the ambient light and the internal light to produce filtered ambient light and filtered internal light; generates primary-source light using a light-emitting-diode (LED) light source; and injects, into a transparent edge-lit liquid crystal waveguide display deployed in at least a portion of a window of the vehicle, the primary-source light, the filtered ambient light, and the filtered internal light in a color-synchronized manner. The filtered ambient light and the filtered internal light improve the brightness of the transparent edge-lit liquid crystal waveguide display.

Abstract: Systems and methods for improving the brightness of a transparent display are disclosed herein. One embodiment collects ambient light using an array of metasurface lenses disposed on an external surface of a vehicle; collects internal light from the vehicle's headlights; filters the ambient light and the internal light to produce filtered ambient light and filtered internal light; generates primary-source light using a light-emitting-diode (LED) light source; and injects, into a transparent edge-lit liquid crystal waveguide display deployed in at least a portion of a window of the vehicle, the primary-source light, the filtered ambient light, and the filtered internal light in a color-synchronized manner. The filtered ambient light and the filtered internal light improve the brightness of the transparent edge-lit liquid crystal waveguide display.

Abstract: A cooling assembly includes a housing defining a fluid chamber, wick structures arranged on an interior surface of the fluid chamber such that one or more flow channels are present therebetween, and a divider. The divider includes an outer frame comprising a first side and a second side and one or more bridging supports extending between and connecting the first side and the second side of the outer frame. The one or more bridging supports are aligned with the one or more flow channels between the wick structures. Each one of the one or more bridging supports define a plurality of vapor flow paths extending therethrough. The one or more bridging supports further define a plurality of vapor spaces between the one or more bridging supports that are aligned with the wick structures. The plurality of vapor flow paths are fluidly coupled to the vapor spaces.