公开(公告)号：US20230096162A1

公开(公告)日：2023-03-30

申请号：US18072592

申请日：2022-11-30

申请人： GE-Hitachi Nuclear Energy Americas LLC

发明人： Eric P. Loewen ,  Scott E. Rasmussen

IPC分类号： F01K7/38 ,  G21D5/16 ,  F22B1/02 ,  F01K19/00 ,  F01K7/34 ,  F01K7/44 ,  F01K11/02 ,  G21D5/12 ,  G21D1/00

摘要： Steam generators in power plants exchange energy from a primary medium to a secondary medium for energy extraction. Steam generators include one or more primary conduits and one or more secondary conduits. The conduits do not intermix the mediums and may thus discriminate among different fluid sources and destinations. One conduit may boil feedwater while another reheats steam for use in lower and higher-pressure turbines, respectively. Valves and other selectors divert steam and/or water into the steam generator or to other turbines or the environment for load balancing and other operational characteristics. Conduits circulate around an interior perimeter of the steam generator immersed in the primary medium and may have different cross-sections, radii, and internal structures depending on contained. A water conduit may have less flow area and a tighter coil radius. A steam conduit may include a swirler and rivulet stopper to intermix water in any steam flow.

公开(公告)号：US11578622B2

公开(公告)日：2023-02-14

申请号：US17164286

申请日：2021-02-01

申请人： MALTA INC.

发明人： Raj Apte ,  Philippe Larochelle

IPC分类号： F01K3/02 ,  F02C9/24 ,  F02C1/05 ,  F02C1/10 ,  F01K13/00 ,  F02C1/04 ,  F02C6/16 ,  F02C6/14 ,  F01K3/12 ,  F01K13/02 ,  B01D53/26 ,  F02C1/08 ,  F28D20/00 ,  F01K3/10 ,  F01K3/06 ,  F01K3/18 ,  F01K7/38 ,  F01K25/10 ,  F22B1/00 ,  F01K25/06

摘要： Systems and methods relating to use of external air for inventory control of a closed thermodynamic cycle system or energy storage system, such as a reversible Brayton cycle system, are disclosed. A method may involve, in a closed cycle system operating in a power generation mode, circulating a working fluid may through a closed cycle fluid path. The closed cycle fluid path may include a high pressure leg and a low pressure leg. The method may further involve in response to a demand for increased power generation, compressing and dehumidifying environmental air. And the method may involve injecting the compressed and dehumidified environmental air into the low pressure leg.

公开(公告)号：US11512613B2

公开(公告)日：2022-11-29

申请号：US17164295

申请日：2021-02-01

申请人： MALTA INC.

发明人： Philippe Larochelle ,  Raj Apte

IPC分类号： F01K13/02 ,  F01K7/16 ,  F01K25/10 ,  F25B13/00 ,  F25B9/00 ,  F25B25/00 ,  F25B9/06 ,  F01K3/06 ,  F01K3/12 ,  F01K3/18 ,  F01K7/38 ,  F22B1/00 ,  F01K3/02 ,  F01K25/06

摘要： Extra heat in a closed cycle power generation system, such as a reversible closed Brayton cycle system, may be dissipated between discharge and charge cycles. An extra cooling heat exchanger may be added on the discharge cycle and disposed between a cold side heat exchanger and a compressor inlet. Additionally or alternatively, a cold thermal storage medium passing through the cold side heat exchanger may be allowed to heat up to a higher temperature during the discharge cycle than is needed on input to the charge cycle and the excess heat then dissipated to the atmosphere.

公开(公告)号：US11280224B2

公开(公告)日：2022-03-22

申请号：US16828955

申请日：2020-03-25

申请人： Raymond Zhou Shaw ,  Bin Wu ,  Xiaoqing Pan

发明人： Raymond Zhou Shaw ,  Bin Wu ,  Xiaoqing Pan

IPC分类号： F01K9/00 ,  F28B9/06 ,  F01K7/38 ,  F01K11/02 ,  F28B1/02 ,  F28B7/00

摘要： A pre-booster pumping system for increasing power generation of a turbine of a thermal power plant includes a booster pump system including an inlet end, an output end and at least one booster pump; the inlet end of the booster pump system being connected to the air draining end of the turbine through an input tube; each booster pump including an air inlet and an air outlet; the waste gas drained from the air draining end of the turbine being inputted to the booster pump; the vapor pressure being increased in the booster pump and then the vapor being outputted from the output end; and a condenser having an input end; the output end of the booster pump system being connected to the condenser through the output tube; the condenser serving to receive the waste gas from the booster pump system and cool the waste vapor as water.

公开(公告)号：US20220082032A1

公开(公告)日：2022-03-17

申请号：US17419815

申请日：2020-05-08

申请人： YARA INTERNATIONAL ASA

发明人： Danny FRANCEUS ,  Lino Giovanni PORRO

IPC分类号： F01K7/38 ,  F01K15/00 ,  F01K7/12 ,  C07C273/04 ,  C01C1/04

摘要： A steam network assembly for a plant including an ammonia-producing unit and a urea-producing unit, including a high-pressure steam line, two medium-pressure steam lines and first and second turbines supplied with high-pressure steam by the high-pressure steam line; wherein the first turbine is a condensing-type turbine with extraction into one of the two medium-pressure steam lines, and is configured to deliver power to a syngas compressor in the ammonia-producing unit of the plant, and the second turbine is a counter-pressure type turbine with extraction connected to the two medium-pressure steam lines and is configured to deliver power to a CO2 compressor in the urea-producing unit of the plant. A method to distribute high-pressure steam in a steam network assembly for a plant including an ammonia-producing unit and a urea-producing unit and a method to revamp the steam network assembly for a plant including an ammonia-producing unit and a urea-producing unit.

公开(公告)号：US11236633B2

公开(公告)日：2022-02-01

申请号：US17279569

申请日：2019-06-22

申请人： XI'AN JIAOTONG UNIVERSITY

发明人： Junjie Yan ,  Yongliang Zhao ,  Ming Liu ,  Daotong Chong

IPC分类号： F01D15/10 ,  F01K7/38 ,  F22D1/18 ,  F22D5/34 ,  F24S20/20 ,  F22D1/50 ,  H02J3/38 ,  F22D11/06 ,  F03G6/00 ,  F03G6/06

摘要： A solar aided coal-fired power generation system participating in primary frequency regulation and a control method thereof propose a system configuration with two regulation schemes by coupling medium-low-temperature solar collectors and a coal-fired generation unit. The two regulation schemes are a high-pressure feedwater bypass scheme and a low-pressure condensate bypass scheme. The present invention formulates a primary frequency regulation control logic, so as to efficiently and accurately participate in the primary frequency regulation, thereby keeping the power grid frequency rapidly stable. The present invention also formulates a working fluid outlet temperature control logic for the solar aided coal-fired thermal system, which adjusts a heat exchange working fluid flow of the solar collectors to ensure that the temperature in each section is stable during the primary frequency regulation. The present invention uses operation matching of the turbine system and the solar collectors to improve effectiveness of the primary frequency regulation.

公开(公告)号：US20210310365A1

公开(公告)日：2021-10-07

申请号：US17279569

申请日：2019-06-22

申请人： XI'AN JIAOTONG UNIVERSITY

发明人： Junjie Yan ,  Yongliang Zhao ,  Ming Liu ,  Daotong Chong

IPC分类号： F01D15/10 ,  F01K7/38 ,  F22D1/18 ,  F22D5/34 ,  F22D11/06 ,  F24S20/20 ,  F22D1/50 ,  H02J3/38

摘要： A solar aided coal-fired power generation system participating in primary frequency regulation and a control method thereof propose a system configuration with two regulation schemes by coupling medium-low-temperature solar collectors and a coal-fired generation unit. The two regulation schemes are a high-pressure feedwater bypass scheme and a low-pressure condensate bypass scheme. The present invention formulates a primary frequency regulation control logic, so as to efficiently and accurately participate in the primary frequency regulation, thereby keeping the power grid frequency rapidly stable. The present invention also formulates a working fluid outlet temperature control logic for the solar aided coal-fired thermal system, which adjusts a heat exchange working fluid flow of the solar collectors to ensure that the temperature in each section is stable during the primary frequency regulation. The present invention uses operation matching of the turbine system and the solar collectors to improve effectiveness of the primary frequency regulation. With rational utilization of different temperature zones of different heat collectors, irreversibility is reduced, and economic efficiency of various thermal system adjustment schemes is further improved. As a result, operation flexibility of the transient process of a supplementary power generation unit can be greatly improved.

公开(公告)号：US20210180472A1

公开(公告)日：2021-06-17

申请号：US17164295

申请日：2021-02-01

申请人： MALTA INC.

发明人： Philippe LAROCHELLE ,  Raj APTE

IPC分类号： F01K13/02 ,  F01K7/16 ,  F01K25/10 ,  F25B13/00 ,  F25B9/00 ,  F25B25/00 ,  F25B9/06 ,  F01K3/06 ,  F01K3/12 ,  F01K3/18 ,  F01K7/38 ,  F22B1/00 ,  F01K3/02

摘要： Extra heat in a closed cycle power generation system, such as a reversible closed Brayton cycle system, may be dissipated between discharge and charge cycles. An extra cooling heat exchanger may be added on the discharge cycle and disposed between a cold side heat exchanger and a compressor inlet. Additionally or alternatively, a cold thermal storage medium passing through the cold side heat exchanger may be allowed to heat up to a higher temperature during the discharge cycle than is needed on input to the charge cycle and the excess heat then dissipated to the atmosphere.

公开(公告)号：US10968784B2

公开(公告)日：2021-04-06

申请号：US17043675

申请日：2019-06-22

申请人： XI'AN JIAOTONG UNIVERSITY

发明人： Hui Yan ,  Ming Liu ,  Daotong Chong ,  Jinshi Wang ,  Weixiong Chen ,  Junjie Yan

IPC分类号： F01K11/02 ,  F01K17/02 ,  F01D15/10 ,  F01K13/02 ,  F01K7/38 ,  F01K7/22 ,  F01K7/40 ,  F01K7/36

摘要： A flexible coal-fired power generation system includes a thermal system for coal-fired power generating unit and a high-temperature heat storage system connected in parallel, wherein: the heat storage system includes a heat storage medium pump (17), a cold heat storage medium tank (18), a hot heat storage medium tank (20), multiple valves, and a heat storage medium and feedwater heat exchanger (21). A heat storage medium heater (16) locates in the boiler (1) and is connected with both the cold heat storage medium tank (18) and the hot heat storage medium tank (20). Through the heat storage medium pump (17), the flow of heat storage medium that enters the heat storage medium heater (16) is adjusted to reduce the output of the steam turbine when the boiler (1) is stably burning.

公开(公告)号：US10941677B2

公开(公告)日：2021-03-09

申请号：US16700142

申请日：2019-12-02

申请人： Mitsubishi Power, Ltd.

发明人： Tomoya Tomiyama

IPC分类号： F01K13/02 ,  F01K7/40 ,  F01K7/38 ,  F01K17/02 ,  F01K17/06

摘要： A power plant comprises a boiler, a turbine, a condenser, a feed water heater, a deaerator, a deaerator water level control valve, an extraction system which introduces the steam extracted from the turbine into the feed water heater, an extraction valve, an auxiliary steam introduction system which introduces auxiliary steam into the feed water heater, an auxiliary steam control valve and a control device. When a rapid load increase request is made, the control device controls, to orient the extraction valve in a closing direction, to maintain an opening of the deaerator water level control valve, and to orient the auxiliary steam control valve in an opening direction.