Abstract Solar cooling is one of the most promising solutions to the worsening energy and climate issues. A solar-driven liquid desiccant evaporative cooling air-conditioning system with solution storage tanks was proposed. The daily performance of the proposed system under the variable solution recirculation ratio (Rs) adjusting method in a typical hot-humid summer day of Nanjing was investigated using a quasi-dynamic mathematical model. The solution storage effect and the coupled characteristics of the solar collecting subsystem and the liquid desiccant cycle were taken into account. The effects of water tank volume (Vwt), the initial solution mass in the solution storage tank (Ms,storage,tank) and the area of solar collector (Asc) on the overall system performance were also evaluated. The results show that with the help of the stored solution, the proposed system can effectively handle the space cooling load during the whole period of operation. The average values of thermal coefficient of performance (TCOP) and solar coefficient of performance (SCOP) are 0.66 and 0.31, respectively. The variable Rs adjusting method can guarantee the required solution concentration and adapt well to the varying solar radiation. When Asc is limited, a smaller Vwt and a larger Ms,storage,tank are recommended to achieve a higher SCOP when covering the required space cooling load.

中文翻译：

---

可调再循环比下带溶液存储的太阳能驱动液体干燥剂冷却系统性能分析

摘要 太阳能冷却是解决日益恶化的能源和气候问题最有希望的解决方案之一。提出了一种带溶液储罐的太阳能驱动液体干燥剂蒸发冷却空调系统。使用拟动态数学模型研究了在南京典型的炎热潮湿的夏季，在可变溶液再循环比（Rs）调节方法下所提出的系统的日性能。考虑了溶液存储效应以及太阳能收集子系统和液体干燥剂循环的耦合特性。还评估了水箱容积 (Vwt)、溶液储存箱中的初始溶液质量 (Ms,storage,tank) 和太阳能集热器面积 (Asc) 对整个系统性能的影响。结果表明，在存储溶液的帮助下，所提出的系统可以有效地处理整个运行期间的空间冷负荷。热性能系数 (TCOP) 和太阳能性能系数 (SCOP) 的平均值分别为 0.66 和 0.31。可变Rs调节方法可以保证所需的溶液浓度，并能很好地适应变化的太阳辐射。当 Asc 有限时，建议使用较小的 Vwt 和较大的 Ms,storage,tank，以在覆盖所需的空间冷却负载时实现更高的 SCOP。可变Rs调节方法可以保证所需的溶液浓度，并能很好地适应变化的太阳辐射。当 Asc 有限时，建议使用较小的 Vwt 和较大的 Ms,storage,tank，以在覆盖所需的空间冷却负载时实现更高的 SCOP。可变Rs调节方法可以保证所需的溶液浓度，并能很好地适应变化的太阳辐射。当 Asc 有限时，建议使用较小的 Vwt 和较大的 Ms,storage,tank，以在覆盖所需的空间冷却负载时实现更高的 SCOP。