公开(公告)号：US10221775B2

公开(公告)日：2019-03-05

申请号：US15394572

申请日：2016-12-29

Applicant: Malta Inc.

Inventor： Raj Apte ,  Philippe Larochelle

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

Abstract: 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：US20250116211A1

公开(公告)日：2025-04-10

申请号：US18719424

申请日：2022-12-14

Applicant: MALTA INC.

Inventor： Bao H. TRUONG ,  Benjamin R. BOLLINGER

IPC: F01K3/02 ,  F01K3/06 ,  F02C1/05 ,  F02C1/10

Abstract: The present disclosure provides pumped heat energy storage systems that can be integrated with a Coal Fired Energy Generation Unit (CF-EGU) to repurpose CF-EGUs as thermal energy storage systems. A pumped heat energy storage system of the present disclosure can store thermal energy by operating as a heat pump with heat discharge occurring as a result of heat engine operation of the pumped heat energy storage system and/or a steam cycle of the CF-EGUs to provide heating thereto. For example, thermal energy can be exchanged via working fluids flowing between the pumped heat energy storage systems and the CF-EGUs to drive turbines that provide power to generators while repurposing equipment from the CF-EGUs to create energy.

公开(公告)号：US20250084773A1

公开(公告)日：2025-03-13

申请号：US18954842

申请日：2024-11-21

Applicant: MALTA INC.

Inventor： Benjamin R. BOLLINGER ,  Sebastian W. FREUND ,  Mert GEVECI

IPC: F01K3/12 ,  F01K3/00 ,  F01K3/06 ,  F01K3/26 ,  F01K13/02 ,  F01K25/00 ,  F02C1/10 ,  F02C6/14

Abstract: The present disclosure provides pumped thermal energy storage systems that can be used to store and extract electrical energy. A pumped thermal energy storage system of the present disclosure can store energy by operating as a heat pump or refrigerator, whereby net work input can be used to transfer heat from the cold side to the hot side. A working fluid of the system is capable of efficient heat exchange with heat storage fluids on a hot side of the system and on a cold side of the system. The system can extract energy by operating as a beat engine transferring heat from the hot side to the cold side, which can result in net work output.

公开(公告)号：US11852043B2

公开(公告)日：2023-12-26

申请号：US17777128

申请日：2020-11-16

Applicant: MALTA INC.

Inventor： Benjamin R. Bollinger ,  Mert Geveci ,  Bao H. Truong ,  Erhan Karaca ,  Sebastian W. Freund ,  David M. Brantzeg ,  James J. Underwood ,  John S. Bowen ,  Roy T. Collins

IPC: F01K3/12 ,  F01K3/00 ,  F01K3/06 ,  F01K3/26 ,  F01K13/02 ,  F01K25/00 ,  F02C1/10 ,  F02C6/14

CPC classification number: F01K3/12 ,  F01K3/006 ,  F01K3/06 ,  F01K3/262 ,  F01K13/02 ,  F01K25/00 ,  F02C1/10 ,  F02C6/14 ,  Y02E60/14

Abstract: The present disclosure provides pumped thermal energy storage systems that can be used to store and extract electrical energy. A pumped thermal energy storage system of the present disclosure can store energy by operating as a heat pump or refrigerator, whereby net work input can be used to transfer heat from the cold side to the hot side. A working fluid of the system is capable of efficient heat exchange with heat storage fluids on a hot side of the system and on a cold side of the system. The system can extract energy by operating as a heat engine transferring heat from the hot side to the cold side, which can result in net work output.

公开(公告)号：US11846197B2

公开(公告)日：2023-12-19

申请号：US17705738

申请日：2022-03-28

Applicant: MALTA INC.

Inventor： Bao H. Truong

IPC: F01D15/10 ,  F01K27/02 ,  F02C6/14 ,  F28D17/04 ,  F28D20/00

CPC classification number: F01D15/10 ,  F01K27/02 ,  F02C6/14 ,  F28D17/04 ,  F28D20/00 ,  F05D2260/213 ,  F28D2020/0026 ,  F28D2020/0069 ,  F28D2020/0078 ,  F28D2020/0082

Abstract: A system including: a pumped-heat energy storage system (“PHES system”), wherein the PHES system is operable in a charge mode to convert electricity into stored thermal energy, wherein the PHES system comprises a working fluid path circulating a working fluid through, in sequence, at least a compressor system, a hot-side heat exchanger system, a turbine system, a cold-side heat exchanger system, and back to the compressor system; and (ii) a fluid path directing a hot fluid from a heat source external to the PHES system through a reheater, wherein a portion of the working fluid path through the turbine system comprises circulating the working fluid through a first turbine, the reheater, and a second turbine, and wherein the working fluid thermally contacts the hot fluid in the reheater, thereby transferring heat from the hot fluid to the working fluid.

公开(公告)号：US20230399948A1

公开(公告)日：2023-12-14

申请号：US18237606

申请日：2023-08-24

Applicant: MALTA INC.

Inventor： Robert B. LAUGHLIN

IPC: F01D1/02 ,  F01K5/00 ,  F01L1/02

CPC classification number: F01D1/02 ,  F01K5/00 ,  F01L1/02 ,  F25B9/06

Abstract: Efficient energy storage is provided by using a working fluid flowing in a closed cycle including a ganged compressor and turbine, and capable of efficient heat exchange with heat storage fluids on a hot side of the system and on a cold side of the system. This system can operate as a heat engine by transferring heat from the hot side to the cold side to mechanically drive the turbine. The system can also operate as a refrigerator by mechanically driving the compressor to transfer heat from the cold side to the hot side. Heat exchange between the working fluid of the system and the heat storage fluids occurs in counter-flow heat exchangers. In a preferred approach, molten salt is the hot side heat storage fluid and water is the cold side heat storage fluid.

公开(公告)号：US11371442B2

公开(公告)日：2022-06-28

申请号：US17174490

申请日：2021-02-12

Applicant: MALTA INC.

Inventor： Raj Apte ,  Philippe Larochelle

IPC: F02C9/24 ,  F01K13/02 ,  F01K25/10 ,  F01D15/10 ,  F01K3/06 ,  F22B1/00 ,  F01K3/18 ,  F01K7/38 ,  F01K3/02 ,  F01K3/12 ,  F02C1/04 ,  F02C1/10 ,  F02C9/16 ,  F01K25/06

Abstract: Systems and methods for variable pressure inventory control of a closed thermodynamic cycle power generation system or energy storage system, such as a reversible Brayton cycle system, with at least a high pressure tank and an intermediate pressure tank are disclosed. Operational parameters of the system such as working fluid pressure, turbine torque, turbine RPM, generator torque, generator RPM, and current, voltage, phase, frequency, and/or quantity of electrical power generated and/or distributed by the generator may be the basis for controlling a quantity of working fluid that circulates through a closed cycle fluid path of the system.

公开(公告)号：US11286804B2

公开(公告)日：2022-03-29

申请号：US16991805

申请日：2020-08-12

Applicant: MALTA INC.

Inventor： Bao H. Truong

IPC: F01D15/10 ,  F02C6/14 ,  F28D17/04 ,  F28D20/00 ,  F01K27/02

Abstract: A system including: a pumped-heat energy storage system (“PHES system”), wherein the PHES system is operable in a charge mode to convert electricity into stored thermal energy, wherein the PHES system comprises a working fluid path circulating a working fluid through, in sequence, at least a compressor system, a hot-side heat exchanger system, a turbine system, a cold-side heat exchanger system, and back to the compressor system; and (ii) a fluid path directing a hot fluid from a heat source external to the PHES system through a reheater, wherein a portion of the working fluid path through the turbine system comprises circulating the working fluid through a first turbine, the reheater, and a second turbine, and wherein the working fluid thermally contacts the hot fluid in the reheater, thereby transferring heat from the hot fluid to the working fluid.

公开(公告)号：US20210172371A1

公开(公告)日：2021-06-10

申请号：US17174493

申请日：2021-02-12

Applicant: MALTA INC.

Inventor： Raj APTE ,  Philippe LAROCHELLE

IPC: F02C1/04 ,  F02C6/14 ,  F02C1/10 ,  H02P9/04 ,  F03G6/06 ,  F03G6/04

Abstract: Disclosed are systems and methods for pump control of a closed thermodynamic cycle system, such as a Brayton cycle. Operational parameters such as working fluid temperature, thermal fluid temperature, stream pressure, and power generation may be the basis for controlling a thermal fluid pump rate.

公开(公告)号：US10920674B2

公开(公告)日：2021-02-16

申请号：US16576329

申请日：2019-09-19

Applicant: Malta Inc.

Inventor： Raj Apte ,  Philippe Larochelle

IPC: F02C9/24 ,  F01K13/02 ,  F01K25/10 ,  F01D15/10 ,  F01K3/06 ,  F22B1/00 ,  F01K3/18 ,  F01K7/38 ,  F01K3/02 ,  F01K3/12 ,  F02C1/04 ,  F02C1/10 ,  F02C9/16 ,  F01K25/06

Abstract: Systems and methods for variable pressure inventory control of a closed thermodynamic cycle power generation system or energy storage system, such as a reversible Brayton cycle system, with at least a high pressure tank and an intermediate pressure tank are disclosed. Operational parameters of the system such as working fluid pressure, turbine torque, turbine RPM, generator torque, generator RPM, and current, voltage, phase, frequency, and/or quantity of electrical power generated and/or distributed by the generator may be the basis for controlling a quantity of working fluid that circulates through a closed cycle fluid path of the system.