A new integration scheme for CO2 capture in low-rank coal fired power plants with energy savings

Ma, Jiliang; Wu, Ying; Chen, Xiaoping

doi:10.1016/j.applthermaleng.2023.120476

Cited by 6 publications

(1 citation statement)

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“…Assuming that the power is replaced by the renewal energy, the increasing powers would be 115.03, 592.12, 743.06, and 959.33 MWh per day with Systems 1-4, respectively. This would result in the standard coal consumption decrement of Systems 1-4 by 35.07, 180.52, 226.54, and 292.47 t, equivalent to the CO 2 emission reduction by 100.65, 518.11, 650.18, and 839.42 t, respectively [39]. Considering the peak-shaving policy, assuming that the subsidized price is 68 USD/MWh, the peaking revenue of Systems 1-4 would reach 7822, 40,264, 50,528, and 65,235 USD per day, respectively.…”

Section: Thermodynamic and Operational Performance Under The Off-desi...mentioning

confidence: 99%

Thermodynamic Comparison of the Steam Ejectors Integrated at Different Locations in Cogeneration Systems

Zhao,

Wang,

Duan

et al. 2024

Energies

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Under the challenge of global energy transition, coal-fired cogeneration systems are undergoing a technical revolution towards enhanced efficiency, heating capacity, and flexibility. In this paper, four schemes using a steam ejector integrated into a cogeneration system are designed. Considering operational safety, integrated locations are selected at the front and back of high- and medium-pressure turbines. Subsequently, the thermodynamic and operational characteristics under both design and off-design conditions are analyzed based on a model built in EBSILON Professional. Finally, a sensitivity analysis of the heating process is conducted. The results show that the integration of steam ejectors can increase the waste heat recovery ratio of exhaust steam by 18.42–45.61% under design conditions. The largest waste heat recovery ratio is obtained in System 4, resulting in the power generation efficiency (ηg) and gross energy utilization efficiency (ηp) of 81.95% and 65.53%, respectively. Meanwhile, the steam ejector can expand the power-load regulation range of the cogeneration system, and System 4 has the lowest lower power limit among all the systems. The ηp values of Systems 1–4 reach extreme values at different mixed steam pressures of the ejector. Increasing the pinch point temperature difference reduces the power load ηg and ηp of Systems 1–4. The results provide technical solutions for improving the heating capacity and efficient and flexible operation of cogeneration systems.

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Section: Thermodynamic and Operational Performance Under The Off-desi...mentioning

confidence: 99%