This study investigates novel vermiculite–calcium chloride composite solid desiccant material for desiccant-assisted evaporative cooling applications. In addition, comparative performance analyses between direct and desiccant-assisted evaporative cooling were performed. According to the study results, temperature drop around 10 ℃ with an average cooling rate of 700 W and coefficient of performance in the range of 5–6 were obtained for both processes. The specific cooling capacity was found 3.5 kJ/g for desiccant assisted and 2.6 kJ/g for direct evaporative cooling process. It was concluded that at low air mass flow rates, performances of both processes are similar whilst at higher air flow rates, desiccant-assisted evaporative cooling becomes more efficient in terms of specific cooling capacity and coefficient of performance. The experiments also showed that vermiculite–calcium chloride provides effective moisture sorption rates above 40% air relative humidity levels. Therefore, this desiccant material could be suitable for desiccant-assisted evaporative cooling applications.

中文翻译：

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V-CaCl2 复合干燥剂的合成与实验研究，用于提高蒸发冷却应用的性能

本研究研究了用于干燥剂辅助蒸发冷却应用的新型蛭石-氯化钙复合固体干燥剂材料。此外，还进行了直接和干燥剂辅助蒸发冷却之间的比较性能分析。根据研究结果，两种工艺的平均冷却速率为 700 W，温度下降 10 ℃左右，性能系数在 5-6 范围内。干燥剂辅助的比冷却能力为 3.5 kJ/g，直接蒸发冷却过程的比冷却能力为 2.6 kJ/g。得出的结论是，在低空气质量流量下，两个过程的性能相似，而在更高空气流量下，干燥剂辅助蒸发冷却在特定冷却能力和性能系数方面变得更有效。实验还表明，蛭石-氯化钙在空气相对湿度水平高于 40% 时提供有效的吸湿率。因此，这种干燥剂材料可能适用于干燥剂辅助蒸发冷却应用。