COMBINED HEAT TRANSFER PERFORMANCES OF POROUS VOLUMETRIC SOLAR RECEIVER INSERTED WITH GLASS TUBE

Dai Guilong; Xiang Tao; Wang Xiaoyu; Qiu Jinyou

doi:10.19912/j.0254-0096.tynxb.2023-1913

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (3) : 479-485. DOI: 10.19912/j.0254-0096.tynxb.2023-1913

COMBINED HEAT TRANSFER PERFORMANCES OF POROUS VOLUMETRIC SOLAR RECEIVER INSERTED WITH GLASS TUBE

Dai Guilong, Xiang Tao, Wang Xiaoyu, Qiu Jinyou

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Abstract

A porous volumetric solar receiver inserted with a quartz glass tube was designed and manufactured to decrease the peak solid temperature and achieve improved thermal efficiency and reliability. This improved receiver homogenizes the concentrated solar flux profile and sucks the heat transfer fluid at the center zone with the inserted quartz glass tube. The radiation-convection heat transfer performances of the improved receiver were investigated by applying the experimental test combined with numerical heat transfer. Results show that the inserted quartz glass tube enables homogenizing the concentrated solar flux profile by increasing the absorbing area and the effects of reflection and refraction on the concentrated solar flux. The inlet velocity at the center zone is much higher than the edge area, which matches the Gaussian concentrated solar flux profile. Compared with the single-layer porous receiver, the improved porous receiver achieves 7.6% higher thermal efficiency and 200 K lower peak solid temperature.

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solar energy / solar absorber / heat flux / heat transfer / thermal efficiency

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Dai Guilong, Xiang Tao, Wang Xiaoyu, Qiu Jinyou. COMBINED HEAT TRANSFER PERFORMANCES OF POROUS VOLUMETRIC SOLAR RECEIVER INSERTED WITH GLASS TUBE[J]. Acta Energiae Solaris Sinica. 2025, 46(3): 479-485 https://doi.org/10.19912/j.0254-0096.tynxb.2023-1913

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