163results about "Electricity cogeneration" patented technology

The present invention provides a method and system for efficiently producing hydrogen that can be supplied to a fuel cell. The method and system of the present invention produces hydrogen in a reforming reactor using a hydrocarbon stream and water vapor stream as reactants. The hydrogen produced is purified in a hydrogen separating membrane to form a retentate stream and purified hydrogen stream. The purified hydrogen can then be fed to a fuel cell where electrical energy is produced and a fuel cell exhaust stream containing water vapor and oxygen depleted air is emitted. In one embodiment of the present invention, a means and method is provided for recycling a portion of the retentate stream to the reforming reactor for increased hydrogen yields. In another embodiment, a combustor is provided for combusting a second portion of the retentate stream to provide heat to the reforming reaction or other reactants. In a preferred embodiment, the combustion is carried out in the presence of at least a portion of the oxygen depleted air stream from the fuel cell. Thus, the system and method of the present invention advantageously uses products generated from the system to enhance the overall efficiency of the system.

An apparatus, system, and method are disclosed to manage the generation and use of hybrid electric power. A monitoring module receives signals from one or more sensors. The signals comprise power level information of an electric energy storage device, power level information of one or more energy converters, and power level information of an electric load. A determination module compares the signals to determine whether electric power from the energy converters satisfies the electric load. A regulation module adjusts the electric power from the energy converters in response to a determination by the determination module that the electric power from the energy converters does not satisfy an electric load threshold.

A system for supplying electric power includes: a plurality of electric motors coupled to well treatment pumps; a mobile substation that receives power from a utility electric grid; a plurality of mobile electric power generating units; a controller configured to (i) receive a total required flow rate of the liquid; (ii) calculate a total amount of electric power required to achieve the required total flow rate; (iii) receive an amount of power available from the utility electric grid; (iv) direct the substation to provide electric power to the plurality of electric motors; and (v), direct one or more electric power generating units in the plurality of electric power generating units to provide electric power to the plurality of electric motors according to a priority order to meet the total amount of electric power, if the required amount of electric power exceeds the amount of power available from the utility grid.

An energy optimization method and control apparatus may be used in a single building or a group of buildings to optimize utility-supplied and renewable sources in order to minimize the total energy cost. Simultaneously, it may also produce and store energy, such as electricity or hydrogen, that can be used to fuel vehicles, provide a means for independent production of household energy needs, or both. Various factors, such as the production of thermal energy and electricity from the renewable sources, the current store of stored energy, the current and expected thermal and electricity requirements of the building (based on a profile), the current and expected electricity loads of the equipment used to process stored energy, the expected thermal and electricity generating capacity of the renewable sources and other factors can be used to determine the mix of renewable-based and utility-based energy that minimizes the total energy cost.

An integrated power production system including a fossil fuel power plant for processing fossil based fuel such as coal or natural gas arranged in tandem with a carbonate fuel cell having an anode and a cathode section. The flue gas of the power plant serves exclusively as the inlet gas for the cathode section of the fuel cell. Anode exhaust gas leaving the anode section of the fuel cell is subjected to processing including sequestration of the carbon dioxide in the exhaust gas.

An energy storage and recovery system includes a renewable power source, a hydrogen generation device in electrical communication with the renewable power source, a hydrogen storage device in fluid communication with the hydrogen generation device, a hydrogen fueled electricity generator in fluid communication with the hydrogen storage device, and a pressure regulator interposed between and in fluid communication with the hydrogen fueled electricity generator and the hydrogen storage device. The pressure regulator is set at an operating pressure of the hydrogen fueled electricity generator.

A fuel cell and heat engine hybrid system using a high-temperature fuel cell having an anode compartment adapted to receive fuel from a fuel supply path and to output anode exhaust gas and a cathode compartment adapted to receive oxidant gas and to output cathode exhaust gas. A heat engine assembly is adapted to receive oxidant gas and a further gas comprising one of the anode exhaust gas and a gas derived from the anode exhaust gas and to cause oxidation of the further gas and generate output power, the heat engine also generating heat engine exhaust including oxidant gas. The heat engine exhaust is then used to provide oxidant gas to the cathode compartment of the fuel cell.

An energy distribution network is provided including an energy source; a hydrogen production facility connected to the energy source; a recipient for hydrogen from the hydrogen production facility; and a controller. The controller controls the production of hydrogen by the hydrogen production facility based on inputs including energy resource availability.

A hydrogen-electricity co-production (HECP) system utilizes a fuel cell to produce hydrogen, electricity, or a combination of both hydrogen and electricity. In a first mode, the fuel cell performs an electrochemical reaction by reacting a hydrogen-containing fuel with oxygen to produce electricity, water and heat. In a second mode, the fuel cell utilizes heat released by an electrochemical reaction of the fuel cell to reform a hydrogen-containing fuel to produce hydrogen rich gas. In a third mode, both hydrogen and electricity are co-produced by the fuel cell. The HECP system can control an amount of hydrogen and / or electricity produced and switch between modes by varying an electrical load on the system.

A method and apparatus for providing a source of power, comprising: a solid oxide fuel cell system and a thermo photovoltaic device. The solid oxide fuel cell system provides a first source of power, wherein the solid oxide fuel cell system produces heat waste when the solid oxide fuel cell is providing the first source of power. The thermo photovoltaic device provides a second source of power and the thermo photovoltaic device provides the second source of power from the heat waste of the solid oxide fuel cell system which is further heated by a combustor in order to provide the second source of power.

A hybrid welding device including a fuel cell and an energy storage device that cooperate to power a welding operation and / or an auxiliary operation are provided. In some embodiments, the hybrid welding device may also include an engine coupled to a generator that is configured to supplement the power provided by the fuel cell and / or the energy storage device. The hybrid welding device may be adapted to provide power for a welding operation and / or an auxiliary operation when operated as a standalone unit and / or when connected to a primary source of utility power.

A hybrid fuel cell system having a fuel cell and a heat engine having an expansion cycle and a compressor cycle and which is further adapted to include a bypass assembly for segmenting expanded oxidant supply gas from the expansion cycle of the heat engine into a first expanded oxidant supply gas portion and a second expanded gas portion and in which the first expanded oxidant supply gas portion is used for the fuel cell and the second expanded gas portion bypassed around the fuel cell.

A battery comprising powdered active materials and capable of storing a large power, and equipment or device having the battery as parts of its structure, wherein an anode cell (2) of two vessels connected via an ion-passing separator (1) is filled with an anode powdered active material and an electrolytic solution (4), a cathode cell (3) is filled with a cathode powdered active material and an electrolytic solution (5) and conductive current collectors (6, 7) in contact with the powdered active materials are provided in the two vessels.

A fuel cell is placed in parallel with a battery via a mechanical switch. The voltage is held nearly constant by the battery and the power flow is controlled by adjusting the fuel cell operating parameters (such as temperature or air flow) and by opening and closing the mechanical switch. The result is a system that operates at nearly constant voltage without the need for an expensive power conditioning system. The output of the system can then be processed via a traditional power conditioning system such as an inverter or dc-to-dc converter without the need for a wide range of input operating voltages. This reduces the cost and size of the fuel cell power conditioning system.

The present invention includes a power system that is designed to provide reliable electrical power to a facility, and specifically to a telecommunications facility. The system includes a number of proton exchange membranes (PEMs) adapted to provide DC power. The system is configured so that the PEMs receive fuel from a header that is supplied by a number of hydrogen generators. Storage tanks are also included to provide hydrogen to the header if the hydrogen generators fail. The hydrogen generators receive electricity initially from an array of photovoltaic panels. If the photovoltaic panels fail then AC power from a commercial utility is provided to the hydrogen generators. Finally, the system includes a number of super capacitors that are operable to maintain power during the time required to change between power sources.

Inductively coupled plasma (ICP) reforming converts carbonaceous compounds into a fuel for use in generating electrical power. Energy rich hydrocarbon fuels, such as coal, marine diesel, oils, and hydrocarbon wastes are employed as a feedstock for the ICP, which transforms the feedstock into a fuel that can be used by fuel cells and gas turbines for the production of electricity. The overall efficiency of an ICP-based electrical power system can be increased by providing partial oxidation within the reaction vessel. The partial oxidation conditions consume a small amount of the reformed fuel gas, thereby liberating sufficient thermal energy to reduce the electrical power requirements of the ICP to maintain desired reactor temperatures, and providing an increase in the overall net electrical power production. The integrated power production system can also adjust to meet an increased requirement for process heat and steam by balancing the effect of partial oxidation.

The present inventive subject matter is drawn to a hybrid ultra reliable power generating system for supplying continuous reliable power at remote locations comprising: a primary power unit producing electric power that is supplied to a load. Also a secondary power unit is included in the form of a closed cycle vapor turbine (CCVT) system that is capable of producing 100% of the electric power that is produced by the primary power unit and which is heated in hot standby by rejected heat of the primary power unit, wherein the vaporizer of the CCVT is maintained during hot standby at a temperature above its nominal operating temperature and the vapor turbine of the CCVT is preferable maintained at idle during hot standby at a rotating speed. Furthermore, the present inventive subject matter is drawn to an apparatus that combines a fuel efficient primary power generation unit system such as a high temperature fuel cell with a secondary power unit that is a very high reliability closed cycle vapor turbine (CCVT) which operates according to a Rankine cycle using organic working fluid that is capable of producing approximately 5-15% of the electric power that is produced by the primary power unit and which is heated by rejected heat of the primary power unit, wherein working fluid in the vaporizer of the CCVT is heated by the heat rejected by the primary power unit.

Disclosed is a method of supplying DC power to equipment using proton exchange membranes (PEMs). PEMs run on hydrogen to produce DC electrical power. In the disclosed embodiment these PEMs are used as an alternative source of power to AC sources. One of these other sources is generated by an array of gas turbines. Another source is provided by a commercial utility. AC from these sources is converted using rectifiers. Capacitors are used to bridge when switching between energy sources.

Apart from electrical energy, nowadays the main engines also supply pneumatic and hydraulic energy to the aircraft, using corresponding media. Apart from mechanical disadvantages this results in reduced engine efficiency in relation to thrust, fuel consumption and weight. According to an, embodiment of the present invention an energy supply system for aircraft is provided, comprising a fuel cell arrangement and an electrical energy distribution device. In this way it is possible to replace all the energy generating systems of the engines, which provide energy for the aircraft systems, except for the starter generator, as a result of which the efficiency of the individual engines is improved. Furthermore, the efficiency of onboard energy generation is improved, which in the final analysis results in reduced fuel consumption.

A hybrid fuel cell-gas turbine system and method efficiently generates power using a combination of separate power generating components. The system includes a turbine system having an air compressor and a turbine, and a fuel cell. By-product waste heat from the fuel cell is used within the fuel cell to heat the cathode air.

Coal is reacted in a furnace 22 to obtain a coal gasification gas. The coal gasification gas is cooled by a gas cooler 23, passed through a porous filter 24, and desulfurized by a desulfurizer 25 to produce a CO-containing gas as an anode. The CO gas-containing gas is subjected to an exothermic reaction in a shift reactor 26 to form H2 and CO2, and the anode gas containing H2 is supplied to an anode 7 of MCFC 2. Thus, in the absence of an extra heat source and a heat exchange source, a desired anode gas is obtained from the coal gasification gas, and with heat buildup of the MCFC 2 being inhibited and its performance being maintained, reduction of CO2 is taken into consideration. A power generating plant equipped with the MCFC 2 capable of using a coal gasification fuel substantially containing a CO gas is thus achieved.

A cogeneration system having flexible and controllable cogeneration loops. There is a first cogeneration loop to recover heat from a fuel cell power module, thereby producing a heat to electricity ratio between 0 and approximately 1.0. There is a second cogeneration loop to produce supplemental thermal energy for hot water generation and / or space heating. This loop can be connected or disconnected via switching valves depending on the thermal demands of hot water and / or space heating. This loop can also be useful to control the fuel processor temperature to prevent it from being overheated in cases when the fuel cell has low fuel utilization efficiency. With this second loop, it becomes possible to adjust the heat to electricity ratio at any desirable levels such as more than 2. It is also possible to produce the hot water at a higher temperature or superheated steam, which would have been difficult if only the first loop is used.

A fuel cell system is provided for storing energy created from the reaction of residual gases at shutdown of a fuel cell stack. This energy can then be used for powering a component of the fuel cell stack and enables air to be used to purge the anode gas.

A power generation system includes a fuel cell including an anode that generates a tail gas. The system also includes a hydrocarbon fuel reforming system that mixes a hydrocarbon fuel with the fuel cell tail gas and to convert the hydrocarbon fuel and fuel tail gas into a reformed fuel stream including CO2. The reforming system further splits the reformed fuel stream into a first portion and a second portion. The system further includes a CO2 removal system coupled in flow communication with the reforming system. The system also includes a first reformed fuel path coupled to the reforming system. The first path channels the first portion of the reformed fuel stream to an anode inlet. The system further includes a second reformed fuel path coupled to the reforming system. The second path channels the second portion of the reformed fuel stream to the CO2 removal system.