溶液除湿系统在极端热湿气候区的最佳除湿回流比计算

溶液除湿系统具有高效、温湿度独立控制、相较于常规空调冷凝除湿灵活与节能等优点，在高温高湿的环境下能够发挥极大的优势。提高溶液除湿系统的循环性能是解决极端热湿气候区高湿等问题的有效手段，为研究溶液除湿系统如何在极端热湿气候区通过优化循环结构来提高系统性能，以永暑礁为例，分析绝热型叉流除湿器与再生器的运行参数及联合循环方式，研究除湿自循环+级间循环模式的溶液除湿(SD-SIC)系统最佳回流比。通过对除湿器与再生器模型进行数值计算表明：定风量SD-SIC系统最佳回流比为0.8,在该回流比下系统平衡时的除湿/再生量、除湿效率、溶液总能耗密度分别：4.69 g/s、60.53%、72.85 kW·kg/s,分别是SD-IC系统的2.2倍、1.2倍和0.6倍；调节除湿回流比可作为定风量工况SD-SIC系优化空气-流量匹配的方法：在定风量工况下，除湿回流比可以将除SD-SIC系统往最佳流量配比下的SD-IC系统优化，且比SD-IC系统更加节能。可见SD-SIC系统拥有良好的节能潜力，可为极端热湿气候区溶液除湿系统运行策略的优化提供参考。

Calculation of Optimal Dehumidification Reflux Ratio of Liquid Desiccant Dehumidification System in Extreme Hot and Humid Climate Zone

Compared with conventional air-conditioning condensation, the liquid desiccant dehumidification system has the advantages of high efficiency, independent control of temperature and humidity, flexible dehumidification, and energy saving. It can play a great advantage in the area of high temperature and humidity. To improve the comprehensive performance of liquid desiccant dehumidification system is one effective way to solve high humidity in extreme hot and humid climate area. In order to study how liquid desiccant dehumidification system can improve the recyclable duration and system performance by optimizing the circulation structure, Yongshu Island is taken as an example to analyze operation parameters and combined circulation mode of adiabatic cross-flow dehumidifier and regenerator. The optimal reflux ratio of solution dehumidification system with dehumidification self-circulation + interstage circulation mode (SD-SIC) is studied. The numerical calculation of the dehumidifier and regenerator model shows that: the optimal reflux ratio of the constant air volume SD-SIC system is 0.8, and the dehumidification/regeneration volume, dehumidification efficiency and total solution energy density at system equilibrium at this reflux ratio are: 4.69 g·s-1, 60.53 % and 72.85 kW·kg·s-1 respectively, which are 2.2 times, 1.2 times and 0.6 times that of the SD-IC system. Adjustment of the dehumidification reflux ratio can be used as an optimized air-flow matching method for the SD-SIC system at constant airflow conditions: Under constant airflow conditions, the dehumidification reflux ratio can be used to optimize the SD-SIC system towards the SD-IC system at the optimum flow rate matching and is more energy efficient than the SD-IC system. It can be seen that the SD-SIC system has good energy-saving q power and can provide a reference for the optimization of solution dehumidification system operation strategies in extreme hot and humid climate zones.