14 results about "Rankine cycle" patented technology

A system for providing mechanical and / or electric power from heat power. A heat medium is arranged in a flow circuit comprising: a condensation channel, a pump channel, an evaporation channel and a turbine channel, substantially in a Rankine cycle. Heating power is provided for evaporation of the heat medium and cooling power is provided for condensation of the heat medium. The pump channel is arranged in the liquid phase portion and a turbine device is arranged in the gas phase portion. The pump channel generates a pressure due to the rotation. The turbine channel comprises a turbine device. The flow circuit is closed so that no heat medium may escape to the surroundings.

The application relates to the technical field of hypersonic aircrafts, and particularly discloses a heat protection and power generation integrated system and method based on a semi-open Rankine cycle, which comprises a water storage tank, a hydrogen storage tank, an electrolytic cell, a steam turbine, a heat exchanger, a hydrogen turbine and a combustion chamber. The system uses liquid water to absorb heat at the leading edge of the aircraft, vaporizes into water vapor to drive the steam turbine to generate power, realizes active heat protection and waste heat conversion; the water vapor after work exchanges heat with liquid hydrogen in the heat exchanger to condense, preheats the fuel while completing the Rankine cycle; the vaporized hydrogen drives the hydrogen turbine to generate power again, improving the power generation efficiency; the condensed water can be introduced into the electrolytic cell to be electrolyzed into hydrogen and oxygen, and the generated hydrogen directly supplements the fuel. The system realizes efficient heat protection, continuous power generation, in-situ production and supplement of fuel through structure coupling, and effectively reduces the mass of the homeward journey system by converting water into fuel in the middle and later stages of flight, thereby improving the endurance and high-altitude performance of the aircraft.

The disclosure provides a hybrid energy storage system, wherein the Brayton cycle unit comprises a first compressor, a first air-salt heat exchanger and an air-air heat exchanger forming a circulation loop, the cold side of the first air-salt heat exchanger is provided with a first inlet and a first outlet, the cold side of the air-air heat exchanger is provided with a second inlet and a second outlet, and the second inlet is used for air entering; the energy storage unit comprises a molten salt heat storage unit, the molten salt heat storage unit is connected with the first inlet and the first outlet to form a circulation loop; a Rankine cycle unit is connected with the molten salt heat storage unit to generate power by obtaining heat; and the processing unit comprises a first unit, the first unit comprises a compression section and an expansion section connected with the compression section, the compression section is connected with the second outlet, has a gas compression function, and is connected with the molten salt heat storage unit to deliver first temperature heat to the molten salt heat storage unit and second temperature compressed air smaller than the first temperature to the expansion section, and the expansion section has a gas expansion function to generate power.

This invention provides a regenerative reverse Rankine cycle dual high-temperature heat pump system. The heat pump system includes: a first heat exchanger, a first compressor, a first regenerator, a second heat exchanger, and a first expansion valve. The first heat exchanger is connected to the first compressor via the first regenerator. The second heat exchanger is connected to the first compressor. The first expansion valve is connected to the first heat exchanger, and the second heat exchanger is connected to the first expansion valve via the first regenerator. By setting up the first regenerator, heat exchange is performed between the working fluid before throttling and before compression, thereby increasing the subcooling before throttling and significantly reducing throttling losses. At the same time, increasing the superheat at the outlet of the first heat exchanger avoids the damage to the compressor caused by wet compression due to ultra-high temperature dry working fluid, which helps to ensure the service life and high reliability of system components.

The application mainly applies to the technical field of cold quantity production, and discloses a refrigeration system of a two-stage low-temperature Rankine cycle unit capable of outputting electric energy, which comprises a first heat exchanger, a first gas storage tank, a first expansion generator set, a second heat exchanger, a first liquid storage tank, a first low-temperature pump, a second gas storage tank, a second expansion generator set, a third heat exchanger, a first compressor, a fourth heat exchanger, a fifth heat exchanger, a throttle valve, a gas-liquid separator, a second liquid storage tank and a second low-temperature pump. The application creatively uses the first law and the second law of thermodynamics to construct a system capable of outputting electric energy while producing cold quantity. The application has high refrigeration efficiency, greatly saves energy, is a high-efficiency green energy production technical system, and is worth popularization and application.

The application provides a Rankine cycle system and a pressure reduction control method. The Rankine cycle system comprises a circulation pipeline, a liquid storage tank, an evaporator, an expander and a condenser. The liquid storage tank, the evaporator, the expander and the condenser are sequentially arranged on the circulation pipeline. The Rankine cycle system further comprises a fluidic device having a flow inlet, a flow outlet and a suction inlet. The flow inlet is connected with a first communication port of the circulation pipeline. The first communication port is located between an inlet of the expander and an outlet of the liquid storage tank. The flow outlet is connected with a second communication port of the circulation pipeline. The second communication port is located between an outlet of the expander and an inlet of the condenser. The suction inlet is connected with a gas outlet of the liquid storage tank. The Rankine cycle system solves the problem that in the prior art, due to incomplete condensation of working medium after the condenser of the Rankine cycle system, gaseous working medium enters the liquid storage tank, thereby causing the pressure in the liquid storage tank to increase.

A system of waste management includes a steam gasification unit to convert municipal solid waste to a syngas. A molten carbonate fuel cell (MCFC) unit receives the syngas at an anode and an industrial exhaust gas at a cathode to generate electrical energy and separate a first carbon dioxide gas. An oxygen combustion unit receives remaining syngas from the anode and combusts the remaining syngas with oxygen to generate a heated gas stream. A steam Rankine cycle unit captures a first thermal energy from the heated gas stream. A carbon capture unit separates water and a second carbon dioxide gas from a resulting cooled gas stream. An electrolysis unit uses the electrical energy from the MCFC unit to split water into the oxygen gas for the oxygen combustion unit and a second hydrogen gas for the anode.

This disclosure proposes a Rankine cycle system for a solar thermal power plant coupled with a heat pump energy storage system. The system includes a photovoltaic power plant (01), a solar thermal power plant (02), a heat pump energy storage system, and a Rankine cycle system. The photovoltaic power plant (01) provides electricity to the heat pump energy storage system; the solar thermal power plant (02) provides a low-grade heat source to the heat pump energy storage system; and the heat pump energy storage system drives the Rankine cycle system to generate electricity. Based on this system, low-cost photovoltaic electricity can be used to drive the heat pump energy storage system to convert the low-grade heat source generated by the solar thermal power plant into a high-grade heat source. The high-temperature heat source stored in the heat pump energy storage system generates high-quality steam to drive the Rankine cycle system to generate electricity, achieving improved thermal energy quality and value, reducing solar curtailment, lowering the coal consumption level of the Rankine cycle system, and contributing to the green and low-carbon transformation of the new power system.

This invention discloses a self-powered liquid CO2 pipeline cooling system based on the cascade utilization of LNG cold energy, belonging to the field of LNG cold energy comprehensive utilization and liquid CO2 pipeline cooling technology. Addressing the existing technical problems of low LNG cold energy utilization, large cooling losses during pipeline cooling, and reliance on external power grids for cooling replenishment, this invention constructs a comprehensive system—employing a low-temperature Rankine cycle unit to recover high-grade cold energy from LNG in the cryogenic temperature range to generate electricity, providing self-powered power for the system; the remaining medium- and low-grade cold energy of LNG is transferred to CO2 in a cascade manner through a cold energy exchange unit to liquefy it; the chilled liquid CO2 is transported to a cold industry park for cooling through a liquid CO2 cooling supply unit, with electrically compressed cooling sub-units installed along the pipeline as needed for relay cooling. This invention achieves efficient cascade utilization of LNG cold energy across the entire temperature range and stable long-distance cooling of liquid CO2. The system is completely self-powered and integrates cooling and power generation, significantly improving overall energy efficiency and cooling stability, and is suitable for large-scale low-temperature cooling scenarios in cold industry parks.

This invention discloses a combined Brayton and Rankine cycle waste heat power generation system and method. It includes a flue gas system, a Rankine cycle power generation system using water as the working fluid, and a Brayton cycle power generation system using supercritical CO2 as the working fluid. The Brayton and Rankine cycle power generation systems are connected in series on the flue gas system's piping, sequentially utilizing the heat provided by the flue gas system to generate electricity. This invention utilizes the properties of supercritical CO2 and water as working fluids, employing a Brayton cycle in the high-temperature portion of the waste heat from the annular cooler to improve power generation efficiency, and a steam Rankine cycle in the low-temperature portion to reduce the exhaust gas temperature and increase waste heat recovery. The combined use of these two cycles achieves energy utilization based on quality, improving the efficiency of sintering waste heat power generation.

The utility model belongs to evaporator technical field in ranken cycle, provide a kind of evaporator for ranken cycle.The utility model of a kind of evaporator for ranken cycle, it include: plate heat exchanger main part;Heat-conducting fin;The heat-conducting fin is equipped with multiple, and is evenly installed on the outer wall of the plate heat exchanger main part, and one end of the heat-conducting fin is fixedly connected with the plate heat exchanger main part;Cold liquid assembly, the cold liquid assembly includes cold liquid tank, return line and liquid pump;The cold liquid tank has flow liquid chamber and ice making chamber;Liquid is injected in the flow liquid chamber, another end of the heat-conducting fin extends into the flow liquid chamber, and is immersed below liquid level;Return line is installed at both ends of the flow liquid chamber, and liquid pump is installed in the return line;And ice making assembly, the ice making assembly is connected with the cold liquid assembly, and is communicated with the ice making chamber, and the ice making assembly is used to prepare ice block in cold liquid tank.

The present invention discloses an expansion engine that, by means of a cycle similar to the Carnot cycle, converts thermal energy in general, and solar energy in particular, so as to transform the heat from a hot source and a cold source into mechanical work and subsequently into electrical energy. There is no economically viable means in the prior art for converting heat resulting from small temperature differences into work. This applies both to systems based on the Rankine cycle and to those based on the Stirling cycle. The present invention generates useful energy from an inexhaustible source such as the sun, using an abundant resource such as water, in a closed circuit. When applied to the utilization of solar energy, the expansion engine has the notable advantage of using virtually the entire spectrum of solar radiation, from infrared and visible light to ultraviolet, and not just a fraction of the visible spectrum, as is the case with photovoltaic panels. The invention is aimed at the production of energy from vast heat sources resulting from small temperature differences, such as those available in geothermal sources, from the temperature difference between surface water and deep-sea water, or from water heated by solar thermal radiation. The present invention enables the production of energy at the required locations and in the required amounts, thereby eliminating the need for electrical distribution networks. The present invention encompasses a system for storing large amounts of energy.

The application discloses a high-temperature centrifugal heat pump unit, and has the technical scheme as follows: a core circulating system module, a constant-pressure air supplement adjusting system module, a waste heat adaptive input system module, a high-temperature heat energy output system module, an intelligent closed-loop control system module, a safety protection and fault early warning system module and a multi-end collaborative communication system module; the core circulating system module is a basic carrier for heat energy upgrading and transfer, and is sequentially and closed-loop connected by a centrifugal compression unit, a condensation heat exchange unit, a throttling adjusting unit and an evaporation heat exchange unit through a sealed pipeline, high-temperature environment-friendly working medium is filled in the closed loop, and the working medium compression, condensation heat release, throttling pressure reduction and evaporation heat absorption full process of the reverse Rankine cycle are completed. The application adopts a modular layered architecture, and the quality is improved through system collaboration and adaptability. The application adopts a layered modular architecture with clear function boundaries and clear collaborative logic.

A power generation system and related method for repowering a fossil-fueled power plant using a carbon-free nuclear steam supply system (NSSS) which replaces the existing fossil plant steam generator which burns fossil fuel such as coal, oil, or natural gas. The existing fossil plant energy conversion system including the turbine-generator (turbogenerator) and auxiliary components of the Rankine cycle is retained. The NSSS may include a small modular reactor (SMR) unit comprising a reactor vessel with nuclear fuel core and steam generator which receives heated primary coolant from the reactor to produce main steam to operate the Rankine cycle. The main steam output by the SMR unit is compressed in a steam compressor to increase its pressure to a level necessary to operate the turbogenerator. The compressor may be operated via a portion of the main steam. An intercooler of the compressor may be used for main steam reheating.