233results about "Combination engines" patented technology

The invention relates to the technical field of peak regulation of power generation systems, in particular to a multi-mode power generation system for a new energy large base and an operation method of the multi-mode power generation system. The multi-mode power generation system comprises a thermal power station and a fused salt energy storage power station. The thermal power station comprises a boiler, a first turbine, a first water return unit and a first generator; the fused salt energy storage power station comprises a high-temperature fused salt tank, a low-temperature fused salt tank, a fused salt heating unit, a steam-water heating unit, a second water return unit, a second steam turbine and a second generator; an air inlet of the fused salt heating unit is configured to obtain steam flowing out of the boiler, and a second discharging opening of the fused salt heating unit is connected with the first water return unit; an air outlet of the steam-water heating unit is connected with the first steam turbine and the second steam turbine. The first water return unit and the second water return unit are connected with a second feeding port of the steam-water heating unit. The multi-mode power generation system can set different operation modes according to different requirements, so that the new energy large base can meet higher requirements.

An engine system for an aircraft includes a first turbofan engine and a second turbofan engine. The first turbofan engine includes a first low-pressure shaft, a first fan having a first fan shaft, and a counterclockwise gearbox assembly. The first fan shaft is drivingly coupled to the first low-pressure shaft through the counterclockwise gearbox assembly. The first low-pressure shaft rotates in a counterclockwise direction. The first fan shaft rotates in the counterclockwise direction such that the first fan rotates in the counterclockwise direction. The second turbofan engine includes a second low-pressure shaft, a second fan having a second fan shaft, and a clockwise gearbox assembly. The second fan shaft is drivingly coupled to the second low-pressure shaft through the clockwise gearbox assembly. The second low-pressure shaft rotates in the counterclockwise direction. The second fan shaft rotates in a clockwise direction such that the second fan rotates in the clockwise direction.

A gas supply system for a high-pressure gas consuming appliance and a low-pressure gas consuming appliance of a floating structure including a tank containing the gas is disclosed. The supply system includes: a first supply circuit and a second supply circuit; a gas return line; and a first heat exchanger and a second heat exchanger configured to carry out a heat exchange between the gas of the first supply circuit and the gas circulating in the return line. The first supply circuit includes an additional pump.

The invention discloses a double-turbine power generation device suitable for a thermal power generating unit, relates to the technical field of thermal power generation, and mainly aims to improve the power generation efficiency of the thermal power generating unit. According to the main technical scheme, a boiler system is connected with steam inlet valves of a first steam turbine power generation sub-set and a second steam turbine power generation sub-set through pipelines, and corresponding steam is conveyed to the two sub-sets by adjusting the opening degree of a valve to be matched with a load distribution target. After the two subsets do work, part of steam is fed into a steam extraction heat regeneration system to recover heat and is used for heating boiler feed water; and the residual exhaust steam enters the condenser system to be condensed into water, and the condensed water is conveyed to the steam extraction heat regeneration system to be heated to become boiler feed water, so that circulating power generation is realized.

The cycloid rotor electronic pump (1) according to the invention allows an electric motor (9) to be integrated into the cycloid rotor electronic pump (1) by forming permanent magnets (7) on the outer circumference (6) of an external gear (2) which can be surrounded on the outside by a stator (10) in order to form the electric motor (9). As a result, an additional connection between the electric motor (9) and the cycloidal rotor electronic pump (1) can be omitted, such that axial installation space and cost are saved. At the same time, the external gear (2) and the internal gear (3) act as a transmission, via which additional elements (not shown here) can be driven via a drive shaft (11) connected to the internal gear (3) in a rotationally fixed manner.

An air turbine and a power generation device, the air turbine comprising a chamber, a valve and a rotor. The chamber comprises a first opening communicating with the atmosphere; the air pressure in the chamber is adjustable, and the difference between the air pressure in the chamber and the atmospheric pressure comprises a first air pressure difference and a second air pressure difference; the valve is connected with the chamber and is configured to open under the action of the first air pressure difference to form a first air flow by the chamber communicating with the atmosphere through the valve and the first opening respectively, and to close under the action of the second air pressure difference to form a second air flow by the chamber communicating with the atmosphere through the first opening, the directions of the first air pressure difference and the second air pressure difference being opposite; the rotor is configured to rotate under the drive of the second air flow. The air turbine can be used for power generation to convert the kinetic energy of the rotor into electrical energy, for example, the first air pressure difference and the second air pressure difference are obtained by utilizing the fluctuation of waves, and ultimately the wave energy is converted into electrical energy.

The invention discloses a compressed air energy storage multi-stage expansion machine quick starting system and method. The compressed air energy storage multi-stage expansion machine quick starting system comprises multi-stage expansion machines which are sequentially connected in series and a main air inlet pipeline connected to the first-stage expansion machine. The main air inlet module is used for supplying and adjusting air flow to the multi-stage expansion machine in a normal operation mode; the last-stage priority starting module is used for converting a high-pressure gas source into low-pressure large-flow mixed gas flow suitable for being driven by the expansion machine in the initial starting stage, and the converted mixed gas flow bypasses the previous expansion machine and directly drives the last-stage expansion machine to rotate and accelerate; the multi-stage preheating module is used for guiding part of gas to carry out reverse-sequence preheating on the previous-stage expansion machines, reverse airflow serves as starting damping and is further used for assisting in stabilizing the rotating speed, the gas completing the preheating task is exhausted through an exhaust valve, speed increasing and reverse-sequence preheating are carried out in parallel, the starting time is greatly shortened, and the starting efficiency is improved. And the starting time of the unit from the cold state to the grid-connected condition is reduced to the minute level.

The invention relates to a multi-source cooperative steam turbine with all-working-condition efficiency reconstruction and a control method. The multi-source cooperative steam turbine comprises a multi-source cooperative steam turbine high-pressure cylinder, a multi-source cooperative steam turbine intermediate-pressure cylinder, a multi-source cooperative steam turbine intermediate-low pressure combined cylinder and a multi-source cooperative steam turbine low-pressure combined cylinder which are coaxially arranged. The gradient adaptive turbine is arranged on another shaft or coaxially arranged through a clutch, and a steam inlet of a gradient adaptive turbine cylinder is connected with a main steam output pipeline of the boiler and is provided with a gradient adaptive turbine main steam regulating valve; a steam exhaust port of the gradient adaptive turbine cylinder is divided into two paths, one path is connected to the downstream of the high-pressure regulating valve so as to lead to a steam inlet of a high-pressure cylinder of the multi-source cooperative steam turbine, the other path leads to a condenser and is provided with a gradient adaptive turbine ventilation valve, and a gradient adaptive turbine rotor is connected with a turbine generator. The steam turbine can effectively improve the circulating heat efficiency of the steam turbine under variable working conditions, and obviously improves the economy of partial load operation of a coal power unit under a novel electric power system.

The invention discloses a multi-energy complementary system based on compressed air energy storage and biomass energy, so that the advantages of the compressed air energy storage and the biomass energy are fully utilized, natural energy is utilized to the maximum extent by the system, and meanwhile, the problem that the energy utilization efficiency of a single system is low is solved. According to the technical scheme, the system comprises a compressed air energy storage unit used for conducting compressed air energy storage on input electric energy and releasing energy in compressed air through an expansion machine so as to conduct power generation and heat recovery; the biomass energy unit is used for utilizing synthesis gas generated by biomass gasification as fuel and providing electric power output and waste heat recovery through combustion; and the heat supply circulating unit is used for recovering waste heat generated by the compressed air energy storage unit and the biomass energy unit and conveying heat to an external heat user side.

The invention discloses a front-mounted steam turbine suitable for high exhaust steam pressure and a steam turbine system.The inner cylinder of the front-mounted steam turbine comprises a first inner cylinder body and a second inner cylinder body which are formed by a first interface passing through the axis, and the outer cylinder of the front-mounted steam turbine comprises a first outer cylinder body and a second outer cylinder body which are formed by a second interface perpendicular to the axis; the two sides of the cylinder walls of the first inner cylinder body and the second inner cylinder body are respectively sleeved and fixed through circular rings; annular skirt parts are respectively arranged on the inner wall surfaces of the first outer cylinder body and the second outer cylinder body and are respectively matched with the peripheral surface of the circular ring; the two annular skirt parts, the outer wall face of the inner cylinder and the inner wall face of the outer cylinder form a low-pressure cavity, and a pressure balance hole penetrating to the low-pressure cavity is formed in the cylinder wall of the outer cylinder and used for being communicated with a low-pressure area. On the basis of overall structure optimization, the bearing capacity of the outer cylinder can be effectively improved, a pressure isolation mechanism is established on the basis of the low-pressure cavity, the action range of high exhaust steam pressure is greatly reduced, and reliable technical guarantee is provided for improving the exhaust steam pressure of a unit.

An energy conversion and storage system, comprises a piston defining an enclosed volume. The piston has an inlet valve proximate a bottom of the piston and an outlet valve proximate a top of the piston. A guide having a vertical displacement is arranged so that the piston travels along the guide. The guide has a compressed gas outlet proximate a bottom of the guide and is arranged to move gas into the piston when the piston contacts the compressed gas outlet. The guide has a release valve operator disposed proximate a top of the guide and is arranged to open the outlet valve when the piston contacts the release valve operator. A source of compressed gas in communication with the compressed gas outlet. The system has means for converting motion of the piston along the guide into either (i) motion of another object or (ii) electric power.

The gas heat engine comprises an isobaric compressor (1), which is connected to the shaft of an isothermal compressor (2), and both compressors (1) and (2) are housed in a container (10). The shaft of the isothermal compressor (2) is connected on the other side through a thermal insulation coupling (8) to the shaft of a rotary isothermal engine (4) and a rotary isobaric engine (3), where both engines are housed in a container (10). The output from the isobaric compressor (1) in the container (10) is connected through a recuperator (7) and a regulator valve (6) to the isobaric engine (3) in a container (9), the output from which is connected to the input to the isothermal engine (4) in the container (9), and its output is connected via piping to the recuperator (7), with an input to the isothermal compressor (2) in the container (10), where its output is connected through a check valve (5) to the isobaric compressor (1) in the container (10).

The application discloses a kind of efficient supercritical carbon dioxide high temperature gas cooled reactor systems and its operating method, the system includes pre-cooler, main compressor, re-compressor, high temperature turbine, low temperature regenerator, high temperature regenerator, high temperature helium-supercritical carbon dioxide heat exchanger, low temperature helium-supercritical carbon dioxide heat exchanger and reactor.The application proposes the power generation system of two-stage split supercritical carbon dioxide cycle comprising high-temperature split re-compression cycle loop and low-temperature re-split reheat expansion cycle loop, by arranging high-temperature helium-supercritical carbon dioxide heat exchanger and low-temperature helium-supercritical carbon dioxide heat exchanger in power generation system, ensure the good matching of helium loop heat release temperature window and supercritical carbon dioxide power cycle loop heat absorption temperature window, realize the efficient cascade utilization of high-temperature gas cooled reactor helium loop large-span temperature interval heat.

The invention relates to the technical field of steam turbines, and discloses a steam turbine cylinder connecting device and a control method of the steam turbine cylinder connecting device.The steam turbine cylinder connecting device comprises an intermediate-pressure cylinder, a low-pressure cylinder, a first pipeline, a second pipeline and a third pipeline, the intermediate-pressure cylinder is used for being connected with a steam extraction system, and the first pipeline is provided with a first adjusting valve; the second pipeline is provided with a second adjusting valve, and the third pipeline is provided with a third adjusting valve. Wherein the first pipeline, the second pipeline and the third pipeline are respectively connected with the medium-pressure cylinder and the low-pressure cylinder. The steam cylinder connecting device enriches the steam exhaust mode of the medium-pressure cylinder and improves the stability and reliability of operation of the steam turbine.

The present invention provides an air turbine system and an operation method, including a compressed air source, which is communicated with the inlet of a high-pressure air turbine through a high-pressure inlet pipe; a high-pressure supplementary air pipe communicated with the supplementary air inlet of the high-pressure air turbine and a medium-pressure supplementary air pipe communicated with the inlet of a medium-pressure air turbine are connected in parallel on the high-pressure inlet pipe; a high-pressure supplementary air valve is arranged on the high-pressure supplementary air pipe, and a medium-pressure supplementary air valve is arranged on the medium-pressure supplementary air pipe; a high-pressure on-off valve and a high-pressure regulating valve are arranged on the high-pressure inlet pipe; a medium-pressure inlet pipe communicated with the inlet of the medium-pressure air turbine and a low-pressure inlet pipe communicated with the inlet of a low-pressure air turbine are connected in parallel at the exhaust port of the high-pressure air turbine; a medium-pressure on-off valve and a medium-pressure regulating valve are arranged on the medium-pressure inlet pipe; a first low-pressure on-off valve, a low-pressure regulating valve and a second low-pressure on-off valve are arranged on the low-pressure inlet pipe; the exhaust port of the medium-pressure air turbine is communicated with the low-pressure inlet pipe through a medium-pressure exhaust pipe; the present invention controls the connection relationship of each air turbine to ensure that the total output power remains unchanged.

A rotor-stator assembly for a rotary engine, compressor or pump, includes a rotor arranged to rotate eccentrically in a stator chamber, the geometry of the rotor being configured to provide a first fluid seal at a region of maximum proximity between the outer peripheral surface of the rotor and the inner peripheral wall of the stator chamber. A second fluid seal is provided by means of a component rotating with the rotor, one end of which is permanently connected to the inner surface of the stator chamber by means of bearings and slides along the inner surface of the stator chamber, and the other end of which is accommodated in a radially movable manner in a receptacle of the rotor, the first and second fluid seals delimiting a first chamber portion and a second chamber portion of the stator chamber.

The invention discloses a power generation system and a power generation method integrating a fourth-generation nuclear reactor and fused salt energy storage, and the power generation system integrating the fourth-generation nuclear reactor and the fused salt energy storage comprises a fused salt energy storage system which comprises a circulating heat storage working medium which is fluoride fused salt; the nuclear energy side power generation system comprises a fourth-generation nuclear reactor, a first power generation device and a second power generation device, supercritical carbon dioxide serves as a heat absorption medium of the fourth-generation nuclear reactor and flows out of a main flow path and a branch flow path, the main flow path supplies the supercritical carbon dioxide into the first power generation device, and the branch flow path supplies the supercritical carbon dioxide into the second power generation device. And supercritical carbon dioxide is introduced into the fused salt energy storage system for heat exchange through the branch flow path. Therefore, the temperature upper limit of a traditional circulating medium can be broken through, the energy conversion efficiency is improved, and meanwhile under the condition that the nuclear energy side power generation system stops running, high-temperature heat stored by the fused salt energy storage system can still maintain running.

A high-power and efficient gas expander provided by the present invention includes: a first rotor shaft and a second rotor shaft connected coaxially, and multiple stages of moving blades are provided on both the first rotor shaft and the second rotor shaft; a first expansion cylinder is sleeved on the first rotor shaft, and an air inlet / outlet communicating with the outside is provided on the first expansion cylinder, and the first rotor shaft rotates in the first expansion cylinder to output work; a second expansion cylinder is sleeved on the second rotor shaft, and an air inlet / outlet communicating with the outside is provided on the second expansion cylinder, and the second rotor shaft rotates in the second expansion cylinder to output work; multiple stages of nozzle rings are provided in both the first expansion cylinder and the second expansion cylinder, and the nozzle rings and the moving blades are arranged alternately. The double-cylinder and single-shaft system structure of the present invention realizes multi-stage expansion, achieves a greater power output, has a large power density and a low unit power cost; the high-power output enables the rotational speed of the shaft system to directly meet the requirements of the grid frequency, eliminating the need for a gearbox to change the output rotational speed, reducing mechanical energy loss, and having a high energy conversion efficiency.

This invention provides a segmented cross-bridge steam seal, method, and steam turbine for reducing steam leakage, applicable to steam turbines. The steam turbine includes an intermediate-high pressure outer cylinder, an integral high pressure inner cylinder, an intermediate pressure inner cylinder, a segmented cross-bridge steam seal, and an intermediate-high pressure rotor. The integral high pressure inner cylinder and intermediate pressure inner cylinder are both located within the intermediate-high pressure outer cylinder, and the segmented cross-bridge steam seal is located between the integral high pressure inner cylinder and the intermediate pressure inner cylinder. The segmented cross-bridge steam seal has several cross-bridge steam seal outlet rectifier chambers, and the integral high pressure inner cylinder includes several high pressure cylinder extraction chambers. The several cross-bridge steam seal outlet rectifier chambers are respectively connected to the several high pressure cylinder extraction chambers. In this invention, the main steam leaking from the segmented cross-bridge steam seal enters the integral high pressure inner cylinder through the make-up steam chamber, realizing the reuse of the main steam leaking from the segmented cross-bridge steam seal. This solves the problems of large steam leakage from the cross-bridge steam seal, waste of heat energy in high-quality steam, and high overall heat consumption rate of the turbine.

An energy recovery system 10 for a fluid (for example hydrogen, natural gas, nitrogen, air) network 12 comprises a multi-stage expander 16 having a plurality of expander stages 26a-c. The multi-stage expander has a controllable valve 60 between each adjacent expander stage which includes a valve member 72, a valve seat 70, and a valve actuator for producing a relative movement between the valve member and valve seat to open and close the valve. Expansion cylinders of each expander stage have a larger swept volume in sequence. A power output means 18 for extracting a power output from the multi-stage expander 20 is also provided. There may be an interstage reheater 32 provided between each adjacent expander stage. There may be an interstage scrubber 30 provided between each adjacent expander stage. The energy recovery system may generate electrical power at 50Hz or 60Hz.

Propulsion system (1) for an aircraft, comprising - at least one gas turbine (2), - at least one fluid system (4) for providing a heated fluid (6), - comprising an external auxiliary power unit (40) - wherein the at least one gas turbine (2) and the at least one fluid system (4) are coupled and arranged in such a fluid-conducting manner that at least one section (30, 34, 36) of the gas turbine (2) is supplied with the heated fluid (6), - wherein the fluid system (4) comprises a combustion unit (12) designed separately from the auxiliary engine (40), which is configured to produce the heated fluid (6) by burning fuel, - characterized in that a fluid supplied to the combustion unit (12) is bleed air from the auxiliary engine (40).

The invention provides a full-load adjustable state reconstruction type steam turbine set, a design method and an operation method thereof. The full-load adjustable state reconstruction type steam turbine set comprises a first low-pressure cylinder and a second low-pressure cylinder which are arranged in series, and a steam exhaust port of the first low-pressure cylinder communicates with a steam inlet of the second low-pressure cylinder; the dynamic rotating speed adjusting system is configured to adjust the rotating speed of the second low-pressure cylinder in real time according to the unit operation state, so that the rotating speed of the second low-pressure cylinder is independent of the rated rotating speed of the first low-pressure cylinder; the load matching mechanism is connected with the output end of the second low-pressure cylinder and used for transmitting mechanical work under the variable rotating speed. By dynamically adjusting the rotating speed of the second low-pressure cylinder, the blade linear speed tracks the change of the steam flow speed in real time, the stability of the speed ratio is reconstructed, under the low-load working condition, the rotating speed is synchronously reduced when the steam flow speed is reduced, and the speed ratio is forced to return to a design efficient area; a sectional rotating speed control strategy is adopted, steady-state operation is maintained in a rotating speed interval, the dynamic process duration is shortened by discretization rotating speed switching, and the alternating stress cycle number is restrained.

A multifuel closed-loop thermal cycle piston engine, system and method. An externally-fired continuous combustion piston-driven engine configured to employ water injection post combustion to maintain a temperature of exhaust gas at a set point to form a closed-loop thermal cycle. A multifuel closed-loop thermal cycle piston engine includes a drive stage, a compression stage separate from the drive stage, the compression stage including a pressure- operated exhaust valve of a compression cylinder, an externally-fired continuous combustion chamber configured to conduct continuous combustion of a nonselective fuel, the combustion chamber comprising a water injection stage succeeding the fuel burner chamber, the water injection stage configured to inject water into the combustion chamber post-combustion, and wherein a quantity of water injected post-combustion is configured to maintain engine exhaust at or below a temperature set point.

This invention belongs to the field of energy storage and power generation technology, and particularly relates to an integrated compressed air energy storage system and method that combines gas and thermal storage. The system includes a compression subsystem, an expansion subsystem, and a double-layered air storage tank. The double-layered air storage tank comprises an inner tank and an outer tank nested together, with a sealed interlayer between them. The sealed interlayer is filled with a thermal storage medium. The air inlet of the compression subsystem and the air outlet of the expansion subsystem are both connected to the external atmospheric environment. The air outlet pipeline of the compression subsystem and the air inlet pipeline of the expansion subsystem pass through the outer tank and connect to the inner tank. The outer tank wall is covered with insulation material. This invention has a small footprint, reduces energy loss during compressed air energy storage, and significantly improves the conversion efficiency between electrical energy and the internal energy of compressed air.

The invention relates to a method for operating an air system (1) for supplying at least one fuel cell stack (2) with air, comprising an air supply path (3) and an air compression system (4) integrated into the air supply path (3) with two electrically operated air compression units (4.1, 4.2) connected in series, wherein at least the downstream second air compressor unit (4.2) comprises a compressor impeller (5.1, 5.2) which is coupled via a shaft (6.1, 6.2) to a turbine impeller (7.1, 7.2) of a turbine (9.1, 9.2) arranged in an exhaust air path (8). According to the invention, in order to limit an axial force acting on the second air compressor unit (4.2) while maintaining the air mass flow and the pressure in the supply air path (3), the intermediate pressure between the turbine (9.2) of the second air compressor unit (4.2) and a downstream of the turbine (9.2) further throttling device (10) integrated into the exhaust air path (8) in the form of a further turbine (9.1) connected to the first air compressor unit (4.1) or in the form of a pressure regulating valve is modified, in particular raised. The invention further relates to a control unit for carrying out the method or for carrying out steps of the method.

A car having: at least one electric motor connected to the two drive wheels; a first generation assembly having a first electric generator and a first internal combustion engine, which is mechanically connected only to the electric generator and, therefore, is mechanically independent of the drive wheels; a second generation assembly having a second electric generator, which is mechanically independent of the first electric generator, and a second internal combustion engine, which is mechanically connected only to the electric generator and, therefore, is mechanically independent of the drive wheels; and one single common outlet pipe, which ends with an emission opening, through which exhaust gases are released into an external environment and which receives exhaust gases from both exhaust ducts of the two internal combustion engines.

The application discloses a supercritical carbon dioxide cycle power generation system and a working method and a solar thermal power generation system, and relates to the technical field of power generation. The supercritical carbon dioxide cycle power generation system comprises a compressor, a cooler, a first regenerator, a heat exchanger, a first turbine, a second regenerator, a second turbine and a third turbine; the compressor is connected with the low-temperature side inlet of the first regenerator; the low-temperature side outlet of the first regenerator is connected with the low-temperature side inlet of the heat exchanger; a part of carbon dioxide working medium flowing out of the low-temperature side outlet of the heat exchanger flows through the first turbine, the low-temperature side of the second regenerator and the third turbine; another part of the carbon dioxide working medium flows through the high-temperature side of the second regenerator and the second turbine; the carbon dioxide working medium flowing through the third turbine and the carbon dioxide working medium flowing through the second turbine are combined and then enter the high-temperature side of the first regenerator; the high-temperature side of the first regenerator is connected with the high-temperature side of the cooler; and the high-temperature side of the cooler is connected with the compressor. The application improves the supercritical carbon dioxide cycle power generation efficiency, does not increase the heat storage cost and improves the heat storage temperature difference.

The utility model provides a diesel generating set sharing a heat dissipation mechanism, which comprises a first power unit and a second power unit which are backup for each other, and further comprises a heat exchanger, and the heat exchanger comprises a first heat exchange piece; the first heat exchange part is provided with a liquid inlet pipe and a liquid outlet pipe, the liquid inlet pipe is connected with a first flow dividing pipe, the first flow dividing pipe is connected with a first water valve and a first standby water valve, the liquid outlet pipe is connected with a second flow dividing pipe, and the second flow dividing pipe is connected with a second water valve and a second standby water valve. The first water valve and the second water valve are connected to the first power unit through pipelines respectively, and the first standby water valve and the second standby water valve are connected to the second power unit through pipelines respectively. The device has the advantages that the equipment cost is reduced, and the occupied space is reduced.