STUDY ON HEAT TRANSFER PERFORMANCE OF HEAT PIPERECEIVER BASED ON DIFFERENT HEATING MODES

Zhang Weiwei; Duan Linzuo; Yuan Donghui; Zhang Zijing; Ba Xuyang; Tian Rui

doi:10.19912/j.0254-0096.tynxb.2021-1422

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (4) : 492-498. DOI: 10.19912/j.0254-0096.tynxb.2021-1422

STUDY ON HEAT TRANSFER PERFORMANCE OF HEAT PIPERECEIVER BASED ON DIFFERENT HEATING MODES

Zhang Weiwei¹, Duan Linzuo¹, Yuan Donghui², Zhang Zijing¹, Ba Xuyang¹, Tian Rui^1,3

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Abstract

In order to study the influence of different heating modes on heat pipe heat transfer performance, this paper designed and built a set of two-phase closed thermosyphon （TPCT） heat pipe heat transfer performance experimental test bench with non-uniform heating function. The experiment tested the influence of the heating method （Uniform heating, Upper surface heating, Lower surface heating）, heating power and placement angle on TPCT heat pipe heat transfer performance. The experimental results show that under certain conditions of heating power and placement angle, TPCT heat pipe has the largest thermal efficiency when uniformly heated, followed by lower surface heating. TPCT heat pipe has the lowest thermal efficiency when the upper surface is heated. Compared with other heating modes, when the lower surface is heated, the total heat transfer resistance of the heat pipe is the smallest, the heat transfer coefficient of the evaporation section is the largest, and the average temperature of the outer wall is the lowest. When the upper surface is heated and uniformly heated, there is little difference in the temperature of the outer wall. No matter which heating method is used, with the increase of placement angle, the thermal efficiency of heat pipe decreases gradually, the total heat transfer resistance increases gradually, and the heat transfer coefficient of evaporator decreases gradually. The outer wall temperature of the liquid pool area in the evaporator is significantly higher than that in the liquid film area. In the liquid film area, the temperature of the outer wall surface changes little along the height direction.

Key words

solar collector / non-uniform heating / heat pipes / thermal efficiency / heat transfer resistance / heat transfer coefficients

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Zhang Weiwei, Duan Linzuo, Yuan Donghui, Zhang Zijing, Ba Xuyang, Tian Rui. STUDY ON HEAT TRANSFER PERFORMANCE OF HEAT PIPERECEIVER BASED ON DIFFERENT HEATING MODES[J]. Acta Energiae Solaris Sinica. 2023, 44(4): 492-498 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1422

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