Development of a 500 °C semi-pilot scale supercritical CO2 power cycle test loop

Choi, Bongsu; Cho, Junhyun; Cho, Jongjae; Shin, Hyung-Ki; Roh, Chulwoo; Lee, Beomjoon; Lee, Gilbong; Ra, Ho-Sang; Hur, Gyunchul; Wang, Eunseok; Baik, Young-Jin

doi:10.1063/5.0085681

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…51 A 60 kW-scale TG was published and compared at different operating parameters. 52 Abbreviations: BNI, Barber-Nichols Inc.; sCO 2 , supercritical CO 2 ; SNL, Sandia National Laboratories.…”

Section: Kiermentioning

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: Kiermentioning

confidence: 99%