188results about "Steam regeneration" patented technology

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, there are thermal energy storage units that provide existing power plants with greater system efficiency, safety, and reduced fuel consumption.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 900° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, thermal energy storage systems are used to improve efficiency and reduce carbon emissions associated with processing materials or other industrial applications.

A system for generating steam for industrial heat. The system may include a plurality of heat pump cycles in thermal communication with each other and in thermal communication with a steam generation cycle. The plurality of heat pump cycles may include first and second heat pump cycles. The first heat pump circulates a first a working fluid and includes a first heat exchanger. The second heat pump cycle circulates a second working fluid and includes a second heat exchanger. The first heat exchanger transfers heat from the first to the second working fluid. The second heat exchanger transfers heat to a third working fluid in the steam generation cycle.

A process for the production of hydrogen comprising the steps of: (i) subjecting a gaseous mixture comprising a hydrocarbon and steam to steam reforming in reformer followed by autothermal reforming with an oxygen-rich gas to generate a reformed gas mixture, (ii) increasing the hydrogen content of the reformed gas mixture by subjecting it to one or more water-gas shift stages in a water-gas shift unit to provide a hydrogen-enriched reformed gas, (iii) passing the hydrogen-enriched reformed gas and an oxygen-rich gas to an oxidation unit containing an oxidation catalyst that converts carbon monoxide present in the hydrogen-enriched reformed gas to carbon dioxide, to form a carbon-dioxide enriched gas mixture, (iv) cooling the carbon dioxide-enriched gas mixture and separating condensed water therefrom, and (v) passing the carbon dioxide enriched gas mixture to a carbon dioxide separation unit to provide a carbon dioxide gas stream and a hydrogen product gas stream.

A master-slave type multi-unit cooperative decoupling system comprises a master unit thermodynamic system, a slave unit thermodynamic system and a decoupling steam supply main pipe. Each of the driving unit and the subordinate unit is a thermodynamic system composed of a boiler, a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder. A hot end outlet of the boiler reheater of the active unit is connected with a decoupling steam supply main pipe, and the decoupling steam supply main pipe is connected with a cold end inlet of the reheater of the slave unit; the driving unit assists the subordinate unit in performing machine-boiler decoupling operation by outputting reheated steam; on the basis, if machine-furnace decoupling transformation is carried out on the active unit, whole-plant decoupling can be achieved; the system is simple in configuration, reliable in switching and good in cost performance; and under the decoupling working condition, the decoupling high bypass is opened, the flow is large, the steam turbine flow is small, and when the steam turbine jumps, the original high bypass flow is small, and the impact degree on the boiler is weakened.

According to the power generation, refrigeration and hot steam supply system based on CO2, steam is generated by recycling waste heat of high-temperature CO2 behind a turbine, the function of a refrigeration compressor is achieved through an ejector, meanwhile, a separator is introduced into a refrigeration system to separate non-condensable impurity gas, and therefore the purity of CO2 is improved; steam generated in the steam generator flows to a steam user, and chilled water generated in the CO2 evaporator is used for cold supply. The CO2 power generation cycle and the refrigeration cycle are deeply coupled through the ejector, high-temperature CO2 is used for preparing steam to achieve heat supply, power is provided for the refrigeration cycle, the comprehensive utilization rate of system energy is increased, and the operation cost can be greatly reduced.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the energy storage system provides higher-temperature heat to a conventional lower-temperature heat source to boost the temperature of a thermal power cycle working fluid to a turbine, thereby increasing efficiency of the power cycle.

Waste heat cascade utilization system for the synergistic recovery of heat energy from heat exchange and milling heat, characterized in that it includes a mechanical heat recovery device, a primary preheating device, a secondary steam generation device and a tertiary low-temperature utilization device; wherein the mechanical heat recovery device connects the heat-generating components of the blower mill to the dry pipe inlet air duct in order to absorb the heat generated by the heat-generating components of the blower mill and transfer it to the dry pipe inlet air duct; wherein the primary preheating device, the secondary steam generating device and the tertiary low-temperature utilization device are arranged sequentially in the flue gas duct at the dry pipe flue gas outlet; wherein the heat outlet of the primary preheating device is connected to the combustion air duct of the boiler in order to preheat the combustion air of the boiler; wherein the steam outlet of the secondary steam generating device is connected to the steam inlet of a steam turbine to assist the turbine in driving a generator for electricity generation; and wherein the tertiary low-temperature utilization device is connected to the process water line to regulate the process water temperature and to assist the plant heating.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

The invention provides an energy supply system based on Mars in-situ resources, which is suitable for supplying energy to a Mars base and comprises an energy conversion unit and a Mars atmosphere trapping unit. The energy conversion unit comprises a carrier gas device suitable for containing the Mars atmosphere and being heated by an external heat source; and the heat energy conversion device is connected with the gas carrying device and is suitable for converting at least part of heat energy of the Mars atmosphere into mechanical energy and / or electric energy and outputting the Mars atmosphere at the first temperature. And the Mars atmosphere trapping unit is communicated with the energy conversion unit and is suitable for trapping the Mars atmosphere on the Mars in situ and supplementing the Mars atmosphere to the energy conversion unit.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the energy storage system provides higher-temperature heat to a conventional lower-temperature heat source to boost the temperature of a thermal power cycle working fluid to a turbine, thereby increasing efficiency of the power cycle.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

The utility model discloses a positive pressure shaft seal system for a steam turbine, which comprises the steam turbine, a heat exchanger, a low pressure section seal and a high pressure section seal, the steam turbine is a back pressure type steam turbine, the steam turbine comprises a cylinder and a rotor, the cylinder is connected with a steam inlet pipe and a steam exhaust pipe, the rotor is arranged in the cylinder, and two ends of the rotor are connected with a main shaft. Low-pressure section seals and high-pressure section seals are installed on the main shaft, the low-pressure section seals on the two sides are both connected with steam leakage connecting pipes, the steam leakage connecting pipes on the two sides are both connected with a heat exchanger, and a circulating water pipeline, a condensate water pipeline and an atmosphere exhaust pipe are further installed on the heat exchanger. The shaft end steam leakage amount of the steam turbine is effectively reduced, the working steam amount consumed by the shaft seal steam extractor for establishing negative pressure is reduced, the internal pressure of the heat exchanger is positive, a water seal does not need to be arranged, and the civil engineering cost is effectively reduced.

The present invention discloses a supercritical Brayton cycle power generation system and method with shunt throttling cooling, the system comprises a heat source, a supercritical Brayton cycle system, a cooling tower and a CO2 compressor intermediate shunt throttling refrigeration system connected in sequence; the present invention effectively controls the temperature of the working fluid entering the CO2 compressor through the refrigeration system, so that the cold end temperature of the supercritical Brayton cycle power generation system can also be cooled to a lower level during high temperatures in summer, maintaining stable and reliable operation of the system. In addition, the existing equipment in the system is utilized to the maximum extent, saving costs.

The invention provides a thermodynamic cycle system applied to a steam turbine. The thermodynamic cycle system comprises a boiler, the steam turbine and a vortex tube. The boiler generates steam with first temperature; the steam turbine discharges a first path of steam with second temperature to the vortex tube, a second path of steam with second temperature is discharged to the liquid inlet of the boiler, the vortex tube separates the first path of steam into hot steam with third temperature and cold steam with fourth temperature, and the hot steam with third temperature is recycled to the steam turbine; the steam turbine drives mechanical equipment through hot steam with the third temperature, cold steam with the fourth temperature is discharged to the liquid inlet of the boiler, the third temperature is higher than the second temperature, and the fourth temperature is lower than the second temperature; wherein the cold steam with the fourth temperature cools the second path of steam to generate cooling liquid, the cooling liquid enters the boiler from a liquid inlet of the boiler, the steam with the first temperature is generated after heating, a vacuum water ring pump and a condenser are omitted, and energy is saved.

An integrated hermetic device for Combined Heat and Power (CHP) energy generation arrangements, such as Heller- type thermal cycles, which integrates within a hermetic and sealed module in a vertical and aligned manner at least one vapor expander, an electric generator, a direct contact condenser and at least one pump, arranged in conjunction with a volume compensator vessel and flow control arrangement, providing this device with innovative and advantageous features in terms of costs, ease of installation and maintenance, and operational simplicity, while not requiring extra lubricating agents in the bearings, operating only with the same working fluid, whereby the tightness of the internal conduits is no longer critical. This integration enables working in thermodynamic vacuum conditions without exposing the rest of the installation to such condition, minimizing the possibility of non- condensable gases ingress, such as air, and avoiding the working fluid losses to the environment.

The invention provides an electrolyser system (10) comprising a heat storage unit (14) and an electrolyser (16). The heat storage unit (14) comprises at least one heat source infeed. The electrolyser (16) comprises at least one electrolyser cell (20), a steam inlet and at least one off-gas outlet. The off-gas outlet is connected to the heat source infeed to heat the heat storage unit (14). The heat storage unit (14) is configured to use its stored heat to produce steam for feeding into the steam inlet and for generating electrical power, either one at a time or both at the same time. The invention also provides a system comprising an intermittent or variable electricity source (12) and an electrolyser system (10) as defined above. The intermittent or variable electricity source (12) can be configured to power the electrolyser (16) and to heat the heat storage unit (14) via a heating element, either both at the same time or individually.

Systems, methods, and apparatuses for utilizing heat are provided. A flash vessel structure includes a first flash chamber and a second flash chamber opposite the first flash chamber. The flash vessel structure is configured to receive a liquid media flow via the first flash chamber, flash evaporate a portion of the liquid media flow to generate a vapor, and drain the liquid media flow via a liquid outlet on the second flash chamber. Adjacent flash chambers are separated by a separator structure including a liquid opening submerged within the liquid media flow. Each flash chamber includes a vapor orifice configured to stay above the liquid media flow. The flash chambers are arranged along a horizontal direction that is substantially perpendicular to gravity. Compressors are coupled via a vapor channel to the flash structure to compress the vapor received from the respective flash chamber.

The present application discloses a cogeneration system based on a liquid-vapor ejector and a water turbine power generation device, which includes a boiler, an intermediate pressure cylinder of a steam turbine, a low-pressure cylinder of the steam turbine, a condenser and a feed water pump connected in sequence through pipelines, and a liquid-vapor ejector, a water turbine power generation device and a heat network heater connected in sequence through pipelines. The steam outlet of the intermediate pressure cylinder of the steam turbine or the extraction port of the low-pressure cylinder of the steam turbine is connected to the liquid-vapor ejector through a pipeline; the intermediate tap of the feed water pump is connected to the liquid-vapor ejector through a pipeline, the liquid-vapor ejector is connected to the fluid inlet of the water turbine power generation device through a pipeline, and the water turbine power generation device is connected to the water inlet of the heat network heater through a pipeline. The high-pressure water coming out of the intermediate tap of the feed water pump entrains the steam outlet of the intermediate pressure cylinder of the steam turbine or the pressurized high-temperature steam coming out of the extraction port of the low-pressure cylinder of the steam turbine to form high-temperature and high-pressure water to drive the water turbine power generation device to generate electricity, and then the high-temperature and high-pressure water becomes high-temperature and low-pressure water for heating, reducing the steam heat exchange loss.

An apparatus for converting thermal energy into mechanical energy by a cycle, having a heat exchanger, a reservoir for an operating medium, a feed line, a turbine, and a return line having at least one recovery device. To utilize waste heat for the generation of electrical energy, the turbine is embodied as a disc rotor turbine with full condensation of the operating medium, whereby a separate condenser can be eliminated.

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.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the energy storage system provides higher-temperature heat to a steam cracking furnace system for converting a hydrocarbon feedstock into cracked gas, thereby increasing the efficiency of the temperature control.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the TES provides higher-temperature heat through non-combustible fluid to an alumina calcination system used to remove impurities or volatile substances and / or to incur thermal decomposition to a desired product.

A thermal energy storage system with fluid flow insulation, the system including heated thermal storage blocks positioned within a housing, and a method for operating the thermal energy storage system, including providing a flow of fluid into the housing, the fluid convectively extracting heat from a top region, a side region and a bottom region of the thermal energy storage system, to generate heated fluid that insulates the thermal storage blocks from the housing and a foundation of the thermal energy storage system.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 900° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, thermal energy storage systems are used to improve efficiency and reduce carbon emissions associated with processing materials or other industrial applications.

The present invention discloses a high-parameter industrial steam supply system and method suitable for large coal-fired units, including a superheater, a temperature and pressure reducer, a high-pressure cylinder, a low-pressure cylinder, a high-pressure heater, a booster pump and a flash device: the outlet of the superheater is respectively connected to the inlet of the high-pressure cylinder and the temperature and pressure reducer; the temperature and pressure reducer reduces the temperature and pressure of the main steam and then supplies high-pressure gas to the outside; the outlet of the high-pressure cylinder is sequentially connected to the reheater, the medium-pressure cylinder and the low-pressure cylinder; the condensate return water or make-up water is respectively connected to the temperature and pressure reducer, the flash device and the inlet of the reheater through a booster pump. The present invention does not require irreversible modification of the heating surface of the boiler reheater, and there is no obvious modification risk; finally, the system of the present invention is simple, reliable in operation, and can flexibly adapt to the situation of fluctuations in steam supply, reduction in supply or even suspension of supply, ensuring that the outlet steam temperature of the boiler reheater is maintained in a relatively stable range, and ensuring that the safety of the unit operation is not affected by fluctuations in steam supply.

The present invention relates to a method for recovering energy comprising the steps of: a) Providing a hot fluid stream; b) Thermally contacting the hot fluid stream with an aqueous condensate in a heat exchanger, thereby transferring heat from the hot fluid stream to the aqueous condensate and vaporizing at least part of the aqueous condensate to obtain a steam stream having a temperature T1 and a pressure p1; c) Subjecting the steam stream to at least one compressing step(s) to obtain a compressed steam stream having a pressure p2; and d) Using the compressed steam stream for energy recovery thereby obtaining a stream comprising an aqueous condensate, wherein—the ratio of pressure p2 to pressure p1, p2 / p1, is 5 to 50; a facility for recovering energy comprising one or more means for compressing the steam stream having a temperature T1 and a pressure p1 to obtain a compressed steam stream having a pressure p2, and the use of one or more means for compressing a steam stream connected in series in said method or facility for compressing a steam stream having a temperature T1 and a pressure p1 to obtain a compressed steam stream having a pressure p2 for direct energy recovery.

A reaction turbine operates on the heat released from the condensation of steam, combined with inherent steam pressure and temperature heads. A series of rotors, each containing multiple curved internal channels, provide compressive boosts between successive stages, while avoiding excessive self-compression. Compressive effects and shock waves generated within these channels provide high levels of condensation, thereby releasing immense amounts of heat. The resulting hot vapor and condensate droplets are then ejected tangentially at the periphery of the rotors to generate thrust. The exhaust steam from the last stage is then compressed and returned to the engine inlet to be mixed with the incoming fresh steam, thereby efficiently completing the system cycle without the need of large cooling towers for condensation.

Power and cooling systems (100; 400) including a drive system (106; 406; 500), a power generation unit (102; 402; 514), and a cooled fluid generation unit (104; 404; 518). A primary working fluid that is expanded within a turbine (114; 412; 504) of the drive system (106; 406; 500) and compressed within compressors (116, 118; 506, 508, 510) in a closed-loop cycle. The power generation unit (102; 402; 514) includes a generator (132; 414) and a heat source configured to heat the primary working fluid prior to injection into the turbine (114; 412; 504). T cooled fluid generation unit (104; 404; 518) includes an ejector (140; 420) downstream of the compressors (116, 118; 506, 508, 510) and a separator (142) arranged downstream of the ejector (140; 420) and configured to separate liquid and gaseous portions of the primary working fluid. The gaseous portion is directed to the compressors (116, 118; 506, 508, 510) and the liquid portion is directed to an evaporator heat exchanger (144; 428) to generate cooled fluid.

The invention relates to an arrangement and a method for converting waste heat into mechanical energy using supercritical sCO2, comprising a pump arrangement (1) for increasing the pressure of the CO2 through a line (2), two heat exchangers, a pre-heating device (7) and a main heating device (12), for transferring waste heat from a waste heat stream in a line (14, 15, 16) to the CO2 as working medium, such that the CO2 can be present in the supercritical state, an engine (17) for generating mechanical energy by means of the sCO2, and an absorption cooling system for controlled cooling of the CO2 from the engine (17), comprising an expeller (23) and an evaporator (31), wherein a line for the CO2 (19) exiting the engine (17) goes from the engine (17) to the expeller (23) and to the evaporator (31) of the absorption cooling system. According to the invention, the absorption cooling system keeps the temperature at the inlet of the pump arrangement (1) constantly below the critical temperature, a recuperator (6) is arranged between the engine (17) and expeller (23) for the transfer of heat from the CO2 exiting the engine (17) to the sCO2 going to the engine (17), and a flow divider (3) is arranged between the pump arrangement (1), the recuperator (6) and the pre-heating device (7) to divide the stream of CO2 into a first partial stream to the recuperator (6) and a second partial stream for the transfer of waste heat by means of the two heat exchangers (7, 12).