500 kW supercritical CO2 power generation system for waste heat recovery: System design and compressor performance test results

Eun, Jae; Park, Joo Hyun; Lee, Gibbeum; Seo, Heewon; Lee, Sunil; Chung, Heung-June; Lee, Si Woo

doi:10.1016/j.applthermaleng.2021.117028

Cited by 21 publications

(2 citation statements)

References 41 publications

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“…45 Test results have been published on a 500 kW sCO 2 power system for waste heat recovery. 46,47 A compressor performance test loop was constructed. Maximum efficiency of 83.7% was achieved at an outlet pressure of 13.7 MPa and a mass flow rate of 12.61 kg/s.…”

Section: Kiastmentioning

confidence: 99%

Demonstration of a small‐scale power generator using supercritical CO₂

Li,

Tian,

Lin

et al. 2024

Carbon Energy

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The supercritical CO2 (sCO2) power cycle could improve efficiencies for a wide range of thermal power plants. The sCO2 turbine generator plays an important role in the sCO2 power cycle by directly converting thermal energy into mechanical work and electric power. The operation of the generator encounters challenges, including high temperature, high pressure, high rotational speed, and other engineering problems, such as leakage. Experimental studies of sCO2 turbines are insufficient because of the significant difficulties in turbine manufacturing and system construction. Unlike most experimental investigations that primarily focus on 100 kW‐ or MW‐scale power generation systems, we consider, for the first time, a small‐scale power generator using sCO2. A partial admission axial turbine was designed and manufactured with a rated rotational speed of 40,000 rpm, and a CO2 transcritical power cycle test loop was constructed to validate the performance of our manufactured generator. A resistant gas was proposed in the constructed turbine expander to solve the leakage issue. Both dynamic and steady performances were investigated. The results indicated that a peak electric power of 11.55 kW was achieved at 29,369 rpm. The maximum total efficiency of the turbo‐generator was 58.98%, which was affected by both the turbine rotational speed and pressure ratio, according to the proposed performance map.

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Section: Kiastmentioning

confidence: 99%

Demonstration of a small‐scale power generator using supercritical CO₂

Li,

Tian,

Lin

et al. 2024

Carbon Energy

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“…CO2 has great density and low compressibility factor thanks to the thermo-physical properties near the critical point. This significantly reduces compressor work and provides higher efficiency compared to conventional Brayton cycles [11]. This makes the sCO2 BC stand out in the applications of marine gas turbine WHR in recent years.…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment of the various split flow supercritical CO2 Brayton cycles for Marine gas turbine waste heat recovery

TOKER

2023

International Journal of Energy Studies

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Supercritical CO2 Brayton cycle (sCO2 BC) can become easily utilized in marine gas turbine waste heat recovery applications due to their high efficiency, compact size, and low-cost advantages. In this study, the performance of the three different split flow sCO2 BCs, including turbine split flow-1 (TSF-1), turbine split flow-2 (TSF-2), and turbine split-3 (TSF-3), for the recovery of marine gas turbine waste heat is compared. The Engineering Equation Solver (EES) application is used to compare the three different split flow sCO2 BCs' performances. Moreover, to investigate the influence of important thermodynamic parameters on cycle performance, a parametric analysis is carried out. The effect of variable exhaust gas temperature, turbine input pressure, and compressor inlet pressure on net power, the energy efficiency of the system, system's exergy efficiency, and exergy destruction are examined. The results suggest that the energy efficiencies of the TSF-1 sCO2 BC, the TSF-2 sCO2 BC, and the TSF-3 sCO2 BC are calculated by 28.71%, 34.5%, and 29.42%, respectively. It has been determined that the cycle's net power increases with rising exhaust gas temperature and turbine input pressure and decreases with compressor input pressure.

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Development and Application of a Modularised Geometry Optimiser for Future Supercritical CO$$_2$$ Turbomachinery Optimisation

2022

Simulation Tools and Methods for Supercritical Carbon Dioxide Radial Inflow Turbine

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500 kW supercritical CO2 power generation system for waste heat recovery: System design and compressor performance test results

Cited by 21 publications

References 41 publications

Demonstration of a small‐scale power generator using supercritical CO₂

Demonstration of a small‐scale power generator using supercritical CO₂

Comparative assessment of the various split flow supercritical CO2 Brayton cycles for Marine gas turbine waste heat recovery

Development and Application of a Modularised Geometry Optimiser for Future Supercritical CO$$_2$$ Turbomachinery Optimisation

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500 kW supercritical CO2 power generation system for waste heat recovery: System design and compressor performance test results

Cited by 21 publications

References 41 publications

Demonstration of a small‐scale power generator using supercritical CO2

Demonstration of a small‐scale power generator using supercritical CO2

Comparative assessment of the various split flow supercritical CO2 Brayton cycles for Marine gas turbine waste heat recovery

Development and Application of a Modularised Geometry Optimiser for Future Supercritical CO$$_2$$ Turbomachinery Optimisation

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Demonstration of a small‐scale power generator using supercritical CO₂

Demonstration of a small‐scale power generator using supercritical CO₂