EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER CHARACTERISTIC OF MOLTEN SALT FLOW ACROSS SUBCOOLED BOILING WATER

Dong Xinyu; Zhang Yuxuan; Meng Fantai; Liu Lu; Wang Teng

doi:10.19912/j.0254-0096.tynxb.2022-1351

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (12) : 121-129. DOI: 10.19912/j.0254-0096.tynxb.2022-1351

EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER CHARACTERISTIC OF MOLTEN SALT FLOW ACROSS SUBCOOLED BOILING WATER

Dong Xinyu, Zhang Yuxuan, Meng Fantai, Liu Lu, Wang Teng

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Abstract

Molten salt steam generator is an important energy conversion equipment in tower solar thermal power station, using solar salt as working medium, the heat transfer characteristics of subcooled boiling water when the molten salt sweeping washout tube are experimentally studied. The experimental working conditions are： molten salt mass flow rate of 504-594 kg/（m²·s）, molten salt temperature of 350-560 ℃. The mass flow rate in the tube side is 135-226 kg/（m²·s）, the inlet temperature is 260 ℃, and the heat flux density is 65-465 kW/m². The effects of molten salt mass flow rate, inlet temperature, water-side pressure and water-side mass flow rate on the heat transfer characteristics of heat exchanger are analyzed. Among them, molten salt temperature and water-side pressure have greater influence on the heat transfer characteristics. Finally, the experimental data are compared and analyzed with the correlations in the literature.

Key words

solar thermal power generation / molten salt / subcooled boiling / heat transfer characteristics / working condition parameters / correlation

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Dong Xinyu, Zhang Yuxuan, Meng Fantai, Liu Lu, Wang Teng. EXPERIMENTAL INVESTIGATION ON HEAT TRANSFER CHARACTERISTIC OF MOLTEN SALT FLOW ACROSS SUBCOOLED BOILING WATER[J]. Acta Energiae Solaris Sinica. 2023, 44(12): 121-129 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1351

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