Liquid desiccant dehumidification systems (LDDS) serve as an energy-efficient alternative to conventional vapor compression refrigeration (VCR) systems, providing enhanced control over both temperature and humidity levels. However, the broader implementation of LDDS is limited due to the corrosive effects of the liquid desiccants on metal components. In response, this study introduces an economical blend of potassium formate (HCOOK) and magnesium chloride (MgCl2) designed to minimize corrosion while maintaining energy efficiency and performance. Selection of mixture ratio and solution concentration and determination of thermo-physical properties were conducted by initial lab-scale tests. Significant bactericidal effects against E. coli and S. aureus were observed. The feasibility and effectiveness of the developed solution were experimentally tested by a comparative investigation in a large-scale solar-integrated liquid desiccant dehumidification system against standard HCOOK (63.5 wt%). The cyclic performance of the novel desiccant solution was examined under varying operational conditions for tropical climates. Results demonstrated that the corrosion levels of the new mixture are comparable to those observed with a standard 63.5 wt% HCOOK solution, while the dehumidification efficiency showed significant improvements, with moisture removal and effectiveness enhanced by 8.7–14.3 % and 5.8–15.2 %, respectively. Significant regeneration occurred between 45 °C and 55 °C. Regeneration efficiency improved by a maximum of 12.5 % relative to the standard HCOOK solution. Notably, the deployment of a solar-assisted regeneration system led to energy cost reductions by 22.8 % compared to traditional VCR systems, achieving a return on investment within 1.8 years.

中文翻译：

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低腐蚀性双吸附式空调：传统 VCRS 的抗菌活性、性能特征和经济价值


液体吸附除湿系统 （LDDS） 是传统蒸汽压缩制冷 （VCR） 系统的节能替代方案，可增强对温度和湿度水平的控制。然而，由于液体干燥剂对金属部件的腐蚀作用，LDDS 的广泛实施受到限制。作为回应，本研究引入了一种经济的甲酸钾 （HCOOK） 和氯化镁 （MgCl2） 混合物，旨在最大限度地减少腐蚀，同时保持能源效率和性能。通过初始实验室规模测试选择混合物比例和溶液浓度以及测定热物理性质。观察到对大肠杆菌和金黄色葡萄球菌的显着杀菌作用。通过在大型太阳能集成液体干燥剂除湿系统中与标准 HCOOK （63.5 wt%） 进行比较调查，对所开发解决方案的可行性和有效性进行了实验测试。研究了新型干燥剂溶液在热带气候的不同操作条件下的循环性能。结果表明，新混合物的腐蚀水平与使用 63.5 wt% 标准 HCOOK 溶液观察到的腐蚀水平相当，而除湿效率显着提高，水分去除率和效果分别提高了 8.7-14.3% 和 5.8-15.2%。在 45 °C 和 55 °C 之间发生显著的再生。 与标准 HCOOK 解决方案相比，再生效率最高提高了 12.5%。值得注意的是，与传统的 VCR 系统相比，太阳能辅助再生系统的部署使能源成本降低了 22.8%，在 1.8 年内实现了投资回报。