Supercritical CO₂ Power Cycles 2026 — PatSnap Eureka
Supercritical CO₂ Power Cycle: 2026 Patent Intelligence
sCO₂ Brayton cycles are transitioning from laboratory demonstrations to MW-class deployments across nuclear, solar, fossil, and marine applications. Explore the full IP landscape — assignees, architectures, and emerging frontiers — powered by PatSnap Eureka.
What Makes sCO₂ Cycles Different?
Supercritical CO₂ (sCO₂) Brayton cycle power technology uses carbon dioxide above its critical point (31.1°C, 7.38 MPa) as a working fluid in closed-loop thermodynamic cycles, offering higher thermal efficiency, compact system architecture, and multi-sector applicability compared to conventional steam Rankine cycles. As decarbonization imperatives and advanced reactor programs accelerate globally, sCO₂ cycles are transitioning from laboratory-scale demonstrations to MW-class deployments.
The core appeal rests on three properties: (1) the dramatic reduction in compressor work near the CO₂ critical point, (2) the compact turbomachinery enabled by the fluid's high density, and (3) thermodynamic compatibility with a wide range of heat source temperatures — 500–850°C peak operating ranges cited in multiple patent records. These properties make sCO₂ cycles attractive across nuclear, solar, fossil, and waste heat recovery applications.
The dataset reveals five distinguishable sub-domains: closed-loop recuperated Brayton cycles; oxyfuel/direct-heating sCO₂ cycles (Allam-type); hybrid and cascaded cycles integrating sCO₂ with fuel cells and renewables; nuclear and space power applications; and simulation, optimization, and control methodologies. PatSnap's advanced materials intelligence covers all five domains in depth.
Patent Filing Patterns & Efficiency Benchmarks
Key quantitative signals from the sCO₂ patent dataset — filing activity by era and system efficiency claims by architecture type.
sCO₂ Patent Filing Activity by Innovation Era (2014–2026)
Filing volume has grown from foundational system concepts (2014–2018) through integration and hybridization to diversified nuclear/space applications and multi-objective optimization (2025–2026).
sCO₂ System Efficiency Claims by Architecture (%)
Hybrid SOFC-sCO₂ architectures substantially exceed standalone cycle efficiency, with distributed multi-generation systems reaching 97% overall energy utilisation.
sCO₂ Patent Filing Share by Jurisdiction
China dominates academic and research institute filings (12+ records), Korea is led by 8 Rivers Capital's Allam-cycle portfolio (11 records), and Japan serves as a secondary filing destination.
sCO₂ Application Domain Maturity Spectrum
From commercial fossil power with carbon capture (most mature) to deep-sea and aerospace (most frontier), sCO₂ cycles span a broad application maturity spectrum.
Four Core sCO₂ Cycle Architecture Clusters
Patent records in this dataset cluster into four distinct architectural approaches, each targeting different application domains and performance objectives.
Closed-Loop Recuperated Brayton Cycles
The most represented approach in this dataset. sCO₂ is compressed, recuperated, heated by an external source, expanded through a turbine, and cooled before re-compression. Variants include simple recuperated, split-flow, and recompression configurations. Core performance levers are recuperator arrangement, compression ratio, and turbine inlet temperature. Key filers include Doosan Heavy Industries and Ishiyama Shintaro (JP).
Parallel recuperator → max compression ratioOxyfuel / Direct-Heating CO₂ Cycles (Allam-Type)
Semi-closed or closed cycles combust hydrocarbon or hydrogen fuel with near-pure oxygen in a CO₂ recirculating stream. Near-zero atmospheric CO₂ emission is an inherent property of this architecture. 8 Rivers Capital holds the dominant patent position in this dataset across at least 9 Korean and Japanese records spanning 2014–2022, covering natural gas, solid fuel, partial oxidation, and LNG-integrated variants.
Pipeline-pressure CO₂ capture inherentHybrid sCO₂ Cycles with Fuel Cells, Renewables & Cryogenics
Integration of sCO₂ cycles with complementary energy systems: solid oxide fuel cells (SOFC) as high-temperature heat sources (~800–1000°C exhaust), CSP collectors, LNG cold energy as heat sink, and transcritical CO₂ as bottoming cycles. Xi'an Jiaotong University's SOFC-sCO₂ system achieves 70.93% electrical efficiency. Distributed multi-generation systems targeting electricity, cooling, and hydrogen co-production exceed 97% overall energy utilisation.
70.93% electrical efficiency claimed (SOFC-sCO₂)Nuclear & Special-Environment sCO₂ Power Cycles
A distinct cluster targets nuclear fission, fusion, and space/deep-sea applications. The compactness and high power density of sCO₂ Brayton systems make them attractive where volumetric constraints are binding. Anhui University's fusion reactor design raises thermal efficiency from 30% to 41% through three-stage recuperation. Xi'an Jiaotong University covers hundred-kilowatt-scale space reactor systems using sCO₂ as both coolant and power cycle fluid.
Fusion efficiency raised 30% → 41%Key Patent Assignees & Filing Positions
Filing patterns in this dataset reveal a bifurcated landscape: 8 Rivers Capital dominates commercial Allam-cycle IP, while Chinese research institutions are rapidly building an optimisation and application-specific IP layer.
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Six Active Frontiers in sCO₂ Innovation
Based on filings from 2023–2026 in this dataset, these are the most active frontiers — signalling where commercial IP battles will be fought next.
Hardware-in-the-Loop Testing & Digital Twins
Wuhan University of Technology (2024, CN) introduces a PLC-based HIL simulation framework combining software cycle models with physical controllers to reduce testing costs and improve confidence in sCO₂ system validation — signalling field maturation toward pre-commercial qualification.
Multi-Objective Lightweight Design for Aerospace
Tsinghua University (2023, CN) applies entropy-weight TOPSIS multi-objective optimisation targeting net power output, thermal efficiency, and total weight simultaneously for hypersonic aircraft applications — a previously unaddressed design constraint in sCO₂ literature.
Nuclear Cycle Performance Optimisation
Huazhong University of Science and Technology (2025, CN) introduces objective indicators across thermodynamic, compactness, and economic dimensions with data-driven objective weighting for ship, space, and vehicle nuclear power applications under varying loads.
Solar-Hydrogen Complementary Dispatchable sCO₂
North China Electric Power University (2024, CN) combines sCO₂ cycle with green hydrogen/oxygen combustion and in-cycle CO₂ separation to achieve zero-emission dispatchable solar power, addressing grid flexibility requirements that pure solar sCO₂ systems cannot meet.
What the IP Landscape Means for R&D Strategy
8 Rivers Capital holds IP breadth on Allam-type cycles. Across at least 9 filings in KR and JP jurisdictions, the company has staked out foundational claims across combustion-based, partial oxidation, nested cycle, methanation, hydrogen co-production, and LNG integration variants. Entrants in fossil sCO₂ with carbon capture must engage with this IP estate or design around it. PatSnap's IP analytics platform can map freedom-to-operate exposure across this portfolio.
Chinese research institutions are building a second-generation IP layer. With at least 12 relevant CN filings from 8 distinct universities and research institutes, China is constructing IP positions focused on multi-objective design, nuclear/space integration, and digital testing frameworks — areas critical for commercialisation and specification compliance. The PatSnap customer base includes R&D teams actively monitoring this activity.
Nuclear and space applications represent an underserved commercial frontier. Three distinct Chinese filings from 2022–2025 address fusion reactors, space reactors, and submarine/deep-sea power — domains where sCO₂ compactness advantages are largest and conventional Rankine cycles are least applicable. First-mover IP positions in these verticals remain open for non-Chinese entrants. The IEA's clean energy transition roadmap identifies nuclear as a critical decarbonisation pathway where sCO₂ efficiency gains are strategically relevant.
HIL testing and digital twin methodologies are becoming IP battlegrounds. As the field moves toward pre-commercial demonstration, patents on simulation frameworks, control algorithms, and performance evaluation methods (Wuhan University of Technology, Huazhong University of Science and Technology, China Institute of Atomic Energy, 2024–2025) will carry increasing commercial weight. IP coverage in these enabling software and test methodologies should be treated as strategically important, not merely supporting tools.
Supercritical CO₂ Power Cycles — key questions answered
Supercritical CO₂ (sCO₂) Brayton cycle power technology uses carbon dioxide above its critical point (31.1°C, 7.38 MPa) as a working fluid in closed-loop thermodynamic cycles, offering higher thermal efficiency, compact system architecture, and multi-sector applicability compared to conventional steam Rankine cycles.
The dataset reveals five distinguishable sub-domains: closed-loop recuperated Brayton cycles using sCO₂ as the sole working fluid; oxyfuel/direct-heating sCO₂ cycles (Allam-type); hybrid and cascaded cycles integrating sCO₂ with Rankine, transcritical CO₂, or fuel cell subsystems; nuclear and space power applications; and simulation, optimization, and control methodologies.
8 Rivers Capital, LLC is the single most prolific assignee in this dataset for sCO₂ power cycles, covering combustion-based cycles with full carbon capture across at least 9 Korean and Japanese records spanning 2014–2022. Chinese university filings are more distributed across institutions but collectively form the largest geographic cluster. No dominant European or U.S. domestic assignee is prominent in this dataset.
Xi'an Jiaotong University's SOFC-sCO₂ systems achieve claimed efficiencies of 70–75% electrical and up to 97% overall energy utilization, substantially exceeding standalone sCO₂ cycles. The Anhui University fusion reactor design raises thermal efficiency from 30% to 41% through a three-stage recuperation architecture.
Based on filings from 2023–2026, the most active frontiers are: hardware-in-the-loop (HIL) testing and digital twins; multi-objective lightweight design for mobile/aerospace platforms; nuclear cycle performance optimization under varying loads; solar-hydrogen complementary dispatchable sCO₂ generation; deep-sea and submarine sCO₂ power systems; and cascaded turbogenerator architectures for solar sCO₂.
Thermodynamic compatibility with a wide range of heat source temperatures is documented consistently across Chinese, Japanese, and Korean filings, with 500–850°C peak operating ranges cited in multiple records.
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References
- Supercritical CO₂ Power Cycle Generation System Testing Method, System, and Computer System — Wuhan University of Technology, 2024, CN
- sCO₂ Brayton Cycle Power System Lightweight Design Method and Device — Tsinghua University, 2023, CN
- CO2-Based Integrated Energy System — Chengdu University of Technology, 2022, CN
- CO2-Based Integrated Energy System — Chengdu University of Technology, 2024, CN
- Hundred-Kilowatt-Scale sCO₂ Brayton Cycle Direct-Cooling Space Reactor System — Xi'an Jiaotong University, 2023, CN
- sCO₂ Power Cycle System and Method for Fusion Reactors — Anhui University, 2022, CN
- sCO₂ Nuclear Power Cycle System Performance Optimization and Evaluation Method and System — Huazhong University of Science and Technology, 2025, CN
- sCO₂ Power Generation System Performance Evaluation Method, System, and Device — China Institute of Atomic Energy, 2024, CN
- Deep-Sea CO₂ Power System Parameter Design Method — China Shipbuilding Research Institute (CSIC) No. 719 Research Institute, 2024, CN
- Solar-Driven and Hydrogen-Oxygen Combustion Complementary Semi-Closed sCO₂ Cycle System and Power Generation Method — North China Electric Power University, 2024, CN
- SOFC and CO₂ Super-Transcritical Power Cycle Combined Generation System — Dalian Maritime University, 2023, CN
- Integrated Fuel Cell and Supercritical CO₂ Distributed Energy System and Method — Xi'an Jiaotong University, 2019, CN
- Integrated Fuel Cell and sCO₂ Solar Thermal Power System and Method — Xi'an Jiaotong University, 2019, CN
- Supercritical CO2 Generation System for Parallel Recuperative Type — Doosan Heavy Industries, 2019, KR
- Hybrid Power Generating System — Doosan Heavy Industries, 2019, KR
- Power Generation Equipment and Power Generation System Using Supercritical CO2 Gas — Ishiyama Shintaro, 2020, JP
- Power Generation Apparatus and Power Generation System Using Super-Critical CO2 Gas — Ishiyama Shintaro, 2021, JP
- Supercritical Carbon Dioxide Brayton Cycle Power Generation System for Waste Heat Recovery — Xi'an Thermal Power Research Institute, 2021, JP
- Multistage Series Turbogenerator System for Supercritical CO2 Power Cycles — Heliogen Holdings, Inc., 2023, JP
- Supercritical CO₂ Power Cycle with Dry Reforming of Methane — Mitsubishi Power Americas, Inc., 2022, JP
- System and Method for High Efficiency Power Generation Using a Carbon Dioxide Circulating Working Fluid — 8 Rivers Capital, LLC, 2022, KR
- Systems and Methods for Power Production Using Nested CO2 Cycles — 8 Rivers Capital, LLC, 2018, KR
- Partial Oxidation Reaction with Closed Cycle Quench — 8 Rivers Capital, LLC, 2020, KR
- International Energy Agency (IEA) — Clean Energy Technology Transitions
- International Atomic Energy Agency (IAEA) — Advanced Reactor Technology
- U.S. Department of Energy — Supercritical CO₂ R&D Programs
All data and statistics on this page are sourced from the references above and from PatSnap's proprietary innovation intelligence platform. This landscape is derived from a limited set of patent and literature records retrieved across targeted searches and represents a snapshot of innovation signals within this dataset only.
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