An experimentally validated numerical model is developed to study the effects of seven design and operational parameters on the heating performance of a solar chimney incorporated with phase change material (PCM) in this paper. It is found that when the latent heat increases from 70 to 170 kJ/kg, the melting time is increased by 103% and freezing time is prolonged by 60%. If heat flux is increased by 33%, the melting time is reduced by 36.4%. Increasing thermal conductivity of the insulation material from 0.02 to 0.06 W/m K, the melting time is prolonged by 47.2%. When absorptivity of the absorber is increased from 0.8 to 1.0, the melting time is decreased by 26.3%. When transmissivity of the glass cover is increased by 25%, the melting time is reduced by 26.7%. For the inlet air temperature, when it decreases from 25 to 15 °C, the freezing time is shortened by 39%. The melting time is only reduced by 8% when thermal conductivity of the absorber is increased by 25 times. Therefore, it can be concluded that the first six parameters have more impact on the system's performance. While the thermal conductivity of absorber slightly impacts it.
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机译：本文开发了一个经过实验验证的数值模型，以研究七个设计和运行参数对掺有相变材料（PCM）的太阳能烟囱的加热性能的影响。发现当潜热从70kJ / kg增加到170kJ / kg时，熔化时间增加103％，并且冷冻时间延长60％。如果热通量增加33％，熔化时间将减少36.4％。将绝缘材料的热导率从0.02提高到0.06 W / m K，熔化时间延长47.2％。当吸收剂的吸收率从0.8增加到1.0时，熔化时间减少了26.3％。当玻璃盖的透射率增加25％时，熔化时间减少26.7％。对于进气温度，当温度从25降至15°C时，冷冻时间缩短了39％。当吸收器的热导率提高25倍时，熔化时间仅减少8％。因此，可以得出结论，前六个参数对系统性能的影响更大。吸收剂的热导率略有影响。
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