Abstract: The present disclosure discloses a flash tank for an HVAC system that minimizes liquid carryover and make its size be smaller. The flash tank includes a housing that houses one or more flashing units. The flashing unit comprises an inner shell, an outer shell maintaining a gap with the inner shell, and one or more inlets to direct flow of refrigerant through the gap to aid partial evaporation of the refrigerant.

Abstract: A state determination device for a fuel cell stack includes: a fuel cell stack including at least one cell; and a control device that performs a state determination of the fuel cell stack by applying a measurement load waveform to the cell. The control device: generates a learning waveform; generates a measurement load waveform to be used this time by using, as reference values, membrane resistance, charge transfer resistance, and diffusion resistance in a relationship between a measurement frequency and an impedance that are generated based on the learning waveform; applies, to the cell, a waveform with an amplitude and frequencies that are calculated based on the measurement load waveform; and performs the state determination by measuring an alternating-current impedance by discharging, from the cell, a current or a voltage corresponding to a frequency of the measurement load waveform.

Abstract: A fuel cell system includes: an anode gas intake path that is linked to a hydrogen circulation path to feed anode gas to an anode of a fuel cell; an anode gas discharge path linked to the anode; a cathode gas intake path for feeding cathode gas to a cathode of the fuel cell; a cathode gas discharge path linked to the cathode; a bypass flow path that links the hydrogen circulation path to the cathode gas intake path and/or the cathode gas discharge path; a circulating pump on the hydrogen circulation path; on-off valves on the anode gas intake path, the anode gas discharge path, and the bypass flow path; and a control device configured to control the on-off valves and the circulating pump. The control device is configured to cause the circulating pump to rotate in a normal or reverse direction selectively to discharge water or water vapor.

Abstract: A state determination device for a fuel cell stack includes: a fuel cell stack including at least one cell; and a control device that performs a state determination of the fuel cell stack by applying a measurement load waveform to the cell. The control device: generates a learning waveform; generates a measurement load waveform to be used this time by using, as reference values, membrane resistance, charge transfer resistance, and diffusion resistance in a relationship between a measurement frequency and an impedance that are generated based on the learning waveform; applies, to the cell, a waveform with an amplitude and frequencies that are calculated based on the measurement load waveform; and performs the state determination by measuring an alternating-current impedance by discharging, from the cell, a current or a voltage corresponding to a frequency of the measurement load waveform.

Abstract: A multi-cylindrical structure supply pipe includes at least three concentric pipes that couple a stationary fuel cell system that is stationary and an in-vehicle fuel cell system mounted on a fuel cell vehicle. The at least three concentric pipes include a hydrogen supply pipe, a liquid circulation pipe, and an electric wire pipe. The hydrogen supply pipe is configured to allow hydrogen gas to flow through the hydrogen supply pipe. The liquid circulation pipe surrounds an outer periphery of the hydrogen supply pipe. The liquid circulation pipe is configured to allow liquid to flow through the liquid circulation pipe outside the hydrogen supply pipe. The electric wire pipe surrounds an outer periphery of the liquid circulation pipe. The electric wire pipe is provided with one or more electric wires outside the liquid circulation pipe.

Abstract: A method for generating hydrogen from a mixture of nitrogen containing borane compound and active metal borohydride reactants uses a catalyst-free water vapor driven hydrothermolysis process. The method involves mechanically mixing a selected ratio of nitrogen containing borane compound such as ammonia borane and an active metal borohydride such as sodium borohydride to produce a mixture, combining the mixture with a water vapor source, and heating the mixture and water vapor source to a temperature within a near ambient temperature range of 30° C. to 104° C., until a product gas comprising hydrogen is released. The heating can be at a constant temperature or at increasing temperatures. Water vapor and impurities are removed from the product gas to produce purified hydrogen gas.

Abstract: The hydrogen storage product comprises one or more reduced-graphene oxide layers functionalized with a boron species and decorated with an alkali or alkaline earth metal. Each layer of the structure further comprises boron-oxygen functional groups comprising oxygen atoms bonded to boron atoms. The hydrogen storage product has a composition suitable for physisorption of hydrogen molecule, and operates to reversibly store hydrogen under operating conditions of low pressure and ambient temperature.

Abstract: A method for generating hydrogen from a mixture of nitrogen containing borane compound and active metal borohydride reactants uses a catalyst-free water vapor driven hydrothermolysis process. The method involves mechanically mixing a selected ratio of nitrogen containing borane compound such as ammonia borane and an active metal borohydride such as sodium borohydride to produce a mixture, combining the mixture with a water vapor source, and heating the mixture and water vapor source to a temperature within a near ambient temperature range of 30° C. to 104° C., until a product gas comprising hydrogen is released. The heating can be at a constant temperature or at increasing temperatures. Water vapor and impurities are removed from the product gas to produce purified hydrogen gas.

Abstract: The invention discloses a method for correcting screen display based on negative feedback. Correction of the G channel value, the B channel value and the R channel value in turn is marked as a correction of the working parameters of the screen. Measuring if the luminance, color temperature y-axis coordinate and color temperature x-axis coordinate of the screen display simultaneously reach the corresponding target values after correcting the working parameters for one time; if yes, the current gray scale correction is ended; otherwise, correcting the working parameters of the current gray scale again by starting from correction of the G channel value. The R channel value, the G channel value and the B channel value are corrected in a separate manner based on the feedback, and the correction process is simplified, such that the accuracy of a single correction is higher and the correction speed is improved.

Abstract: The hydrogen storage product comprises one or more reduced-graphene oxide layers functionalized with a boron species and decorated with an alkali or alkaline earth metal. Each layer of the structure further comprises boron-oxygen functional groups comprising oxygen atoms bonded to boron atoms. The hydrogen storage product has a composition suitable for physisorption of hydrogen molecule, and operates to reversibly store hydrogen under operating conditions of low pressure and ambient temperature.

Abstract: A search engine system is described herein that provides an alternative data path for collecting results provided by index servers. The alternative data path collects the results in a direct and asynchronous manner; this is in contrast to a synchronous path used to deliver search results to end users via one or more aggregator modules. An analysis system can use the alternative data path to collect a large amount of richly descriptive information regarding the performance of the search engine system, circumventing bottlenecks and other constraints that would otherwise be imposed by the synchronous data path. The analysis system can analyze the information collected from the index servers to improve the performance of the search engine system.

Abstract: A search engine system is described herein that provides an alternative data path for collecting results provided by index servers. The alternative data path collects the results in a direct and asynchronous manner; this is in contrast to a synchronous path used to deliver search results to end users via one or more aggregator modules. An analysis system can use the alternative data path to collect a large amount of richly descriptive information regarding the performance of the search engine system, circumventing bottlenecks and other constraints that would otherwise be imposed by the synchronous data path. The analysis system can analyze the information collected from the index servers to improve the performance of the search engine system.