THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

Yufeng Pei

,

Xiaoxu Chen

,

Wei Sun

,

Bingqi Zhu

,

Shucheng Wang

online first only

Performance analysis of mixing syngas from biomass gasification on the combined cycle power plant

ABSTRACT
A combined cycle power plant coupled with biomass gasification system is proposed in this present research. The thermodynamic analysis is performed by the impact factor of the mixing ratio and the equivalence ratio. The results show that, with the increase of the mixing ratio from 0 to 50%, the syngas flow from biomass gasification increases from 0 to 54.20 kg/s. The inlet airflow decreases from 654.6 kg/s to 576.3 kg/s. The temperature of the flue gas increases from 586.5ºC to 591.4ºC. Besides, the power output of the gas turbine increases from 260.51 MW to 264.61MW, while, the power output of the steam turbine drops from 131.05 MW to 126.89 MW. Additionally, with the equivalence ratio increasing from 0.20 to 0.40, the H2 composition decreases from 3.01 % to 1.53 % and the CO composition drops rapidly from 23.75 % to 10.44 %. The net calorific value of the syngas decreases from 6709.85 kJ/kg to 3369.03 kJ/kg, the mass flow rate of both the syngas and the flue gas increase from 6.88 kg/s to 9.02 kg/s and from 575.17 kg/s to 601.00 kg/s, respectively. Besides, the power output of the gas turbine increases from 264.49 MW to 270.17 MW, while, the power output of the steam turbine drops from 127.01 MW to 121.28 MW.
KEYWORDS
biomass gasification, syngas, combined cycle power plant, CCPP
PAPER SUBMITTED: 2024-07-19
PAPER REVISED: 2024-11-20
PAPER ACCEPTED: 2024-11-29
PUBLISHED ONLINE: 2025-02-16
DOI REFERENCE: https://doi.org/10.2298/TSCI240719005P
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Performance analysis of mixing syngas from biomass gasification on the combined cycle power plant