Experimental study on the influence of fin parameters on heat transfer of PCM based radiator

doi:10.19799/j.cnki.2095-4239.2021.0426

Abstract

Abstract:

In order to study the effects of fin number, inclination angle and phase change material on the heat transfer performance of power radiator with longitudinal fins, five different structure radiators with and without phase change material were experimentally studied under the condition of constant heat load of 16 W. The experiment is carried out through the experimental system composed of experimental section, DC power supply and data acquisition equipment. The specific effects of the number of fins (1～5), the inclination angle of the radiator (0°～90°) and the phase change material (n-eicosane) on the heat transfer performance of the radiator are analyzed experimentally. The thermal performance of the radiator is evaluated by the temperature rise characteristics and phase change heat transfer characteristics of the radiator containing phase change materials. The results show that the tilt angle and the number of fins play a key role in the formation, heat transfer and operation time of liquid phase change material convection unit. For the radiator with phase change material with an inclination of 0°, compared with one fin, the time required for five fins to reach the maximum allowable temperature increases by 80%, while when the inclination increases to 90°, the increase of the number of fins has no significant effect on the time. For all tilt angles, the PCM temperature at each measuring point decreases with the increase of the number of fins. When the dip angle increases, the phase transition region becomes larger due to the enhancement of buoyancy induced flow; Under the condition of single fin, the working time at 60° inclination angle is 78.6% longer than that at 0° inclination angle.

Key words: heat transfer characteristic, PCM material, fin structure, inclination of radiators

CLC Number:

TK 11

Wei WU, Shoucheng LI, Weian XIE. Experimental study on the influence of fin parameters on heat transfer of PCM based radiator[J]. Energy Storage Science and Technology, 2021, 10(6): 2303-2311.

Figures/Tables 12

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参数	液态	固态
相变温度/℃	37	35
密度/(kg/m³)	770	810
比热容/[kJ/(kg·℃)]	2.2	1.9
潜热/(kJ/kg)	241	241
导热系数/[W/(m·K)]	0.157	0.39

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