MODELING AND SIMULATION OF FLUIDIZED BED SOLID PARTICLE/sCO2 HEAT EXCHANGER OF sCO2 SOLAR THERMAL POWER PLANT

Yang Yihui; Yu Qiang; Wang Zhifeng; Bai Fengwu

doi:10.19912/j.0254-0096.tynxb.2020-1308

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (8) : 195-203. DOI: 10.19912/j.0254-0096.tynxb.2020-1308

MODELING AND SIMULATION OF FLUIDIZED BED SOLID PARTICLE/sCO₂ HEAT EXCHANGER OF sCO₂ SOLAR THERMAL POWER PLANT

Yang Yihui, Yu Qiang, Wang Zhifeng, Bai Fengwu

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Abstract

In order to study the heat transfer characteristics under different operating conditions, a model of fluidized-bed solid particle/sCO₂ heat exchanger is established by using the multi-section lumped parameter method in this paper, and the dynamic characteristics of the heat transfer system under the disturbances of different input variables are studied. Besides, the sensitivity of system performance to the key parameters is also analyzed. The results show that the disturbance of inlet temperature of the heat exchange system has a large influence on the outlet temperature of the heat exchanger, while the mass flow rate on the input side has a small influence; Small tube dimension and low tube number are easy to obtain a higher heat transfer coefficient for sCO₂ side. In addition, the small particle size and the lower fluidizing-gas velocity are conducive to the improvement of the particle-side heat transfer coefficient under the minimum fluidization condition.

Key words

solar thermal power / solid particle / sCO₂ / heat exchanger / lumped parameter method

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Yang Yihui, Yu Qiang, Wang Zhifeng, Bai Fengwu. MODELING AND SIMULATION OF FLUIDIZED BED SOLID PARTICLE/sCO₂ HEAT EXCHANGER OF sCO₂ SOLAR THERMAL POWER PLANT[J]. Acta Energiae Solaris Sinica. 2022, 43(8): 195-203 https://doi.org/10.19912/j.0254-0096.tynxb.2020-1308

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