摘要:
A method for optimizing the efficiency of a solar powered hydrogen generation system is disclosed. The system utilizes photovoltaic modules and a proton exchange membrane electrolyzer to split water into hydrogen and oxygen with an efficiency greater than 12%. This high efficiency for the solar powered electrolysis of water was obtained by matching the voltage generated by photovoltaic modules to the operating voltage of the electrolyzer. Optimizing PV-electrolysis systems makes solar generated hydrogen less expensive and more practical for use as an environmentally clean and renewable fuel.
摘要:
Exemplary embodiments include methods and devices for storing and recovering renewable solar (photovoltaic) energy in batteries by using circuits that automatically connect batteries in parallel during charging and in series when discharging and to build battery strings that automatically resist overcharging and excessive discharging. Other embodiments may include methods for optimizing the efficiency of solar charging by varying the number of battery cells in series to match the battery voltage to the photovoltaic maximum power point voltage.
摘要:
One embodiment of the invention includes a photovoltaic system that provides both electricity and low-grade heat, together with many options of utilizing the energy. The electricity may efficiently be used to drive a high-pressure electrolyzer that produces hydrogen. The hydrogen pressure may be boosted to a final compression of at least 700 bar. In one embodiment the pressure may be boosted using a metal-hydride compressor and stored. The stored high pressure hydrogen may be used to fill fuel-cell electric vehicle (FCEV) tanks. The electricity can also be used to efficiently charge the batteries in an extended range electric vehicle (EREV).
摘要:
A product includes a vehicle battery, capable of being charged using solar energy, a plurality of photovoltaic cells, arranged in at least one of series or parallel, forming an array that produces a self-regulated voltage and current for charging the vehicle battery using solar energy, and an electrical connection linking the array to the vehicle battery.
摘要:
A soil sampler assembly for obtaining undistrubed soil samples having an outer corer member for coring the soil during sampling and including first and second ends and also having an inner sampling member having first and second ends with the inner sampling member being removably disposed within the outer corer member for receiving a soil sample and adapted to be removed from the outer corer means without disturbing the soil sample.
摘要:
A high pressure proton exchange membrane based water electrolyzer system that may include a series of proton exchange membrane (PEM) cells that may be electrically coupled together and coupled to a proton exchange membrane to form a membrane electrode assembly (MEA) that is spiral wound onto a conductive center post, wherein an innermost PEM cell of the MEA may be electrically connected with the conductive center post, or center electrode, and wherein an outermost PEM cell of the MEA may be electrically coupled to pressure vessel cylinder, or outer electrode. Each PEM cell may include an anode portion and a cathode portion separated by a portion of the PEM membrane. In addition, a non-permeable separator layer may also be spiral wound around the conductive center post and separates the wound portions of the PEM core.
摘要:
One embodiment of the invention includes a process comprising transmitting electrical power produced by a PV array to an electrolyzer and transferring heat from the PV array to the electrolyzer. The resulting process produces renewable hydrogen from solar energy at a lower cost per kg.
摘要:
One embodiment of the invention includes a PV array and an electrolyzer operatively connected together and each operatively connected to a utility power grid so that electricity produced by the PV array is selectively delivered to the utility power grid and the electrolyzer. The resulting process increases the efficiency of the solar-hydrogen production process, and results in lower-cost renewable hydrogen.
摘要:
In a preferred method, a spilled fluid, lighter than and immiscible with water, is removed from the subsurface by first penetrating through the fluid zone and at least partially through the groundwater zone to provide a bore in communication therewith. Then, at suitable intervals, an amount of fluid is extracted from the fluid zone through the bore at a selected rate. In addition, at suitable intervals, an amount of water from the groundwater zone is extracted through the bore at a selected rate. Meanwhile, a vacuum is applied to one or more selected portions of the subsurface to draw air therethrough, to volatilize volatilizable components of the fluid, and to induce movement of the volatile (vapor) and liquid and heavy components of the fluid into the bore for extraction. A recovery well has a perforated first tube in the bore and a second tube which moves axially within the first tube to expose a varying portion of the perforated axial extent of the second tube to the vacuum, whereby the vacuum is applied to a selected portion of the subsurface directing movement of air therethrough to volatilize light components and to induce movement of the vapor and liquid components to and through the tubes and to the top surface.
摘要:
A method is disclosed for the use of an aqueous surfactant solution to remove water-insoluble, organic contaminant from subsurface soil layers. The process is carried out continuously with the application of the surfactant solution and the removal of the leachate from a recovery well within the treatment area. It is contemplated that the leachate will be treated above ground to remove the dispersed contaminant.