Mechanical Power Engineering Department, Faculty of Engineering, Tanta University, Egypt.
J Adv Res. 2014 Mar;5(2):175-82. doi: 10.1016/j.jare.2013.02.002. Epub 2013 Mar 30.
The dehumidifier is a key component in liquid desiccant air-conditioning systems. Analytical solutions have more advantages than numerical solutions in studying the dehumidifier performance parameters. This paper presents the performance results of exit parameters from an analytical model of an adiabatic cross-flow liquid desiccant air dehumidifier. Calcium chloride is used as desiccant material in this investigation. A program performing the analytical solution is developed using the engineering equation solver software. Good accuracy has been found between analytical solution and reliable experimental results with a maximum deviation of +6.63% and -5.65% in the moisture removal rate. The method developed here can be used in the quick prediction of the dehumidifier performance. The exit parameters from the dehumidifier are evaluated under the effects of variables such as air temperature and humidity, desiccant temperature and concentration, and air to desiccant flow rates. The results show that hot humid air and desiccant concentration have the greatest impact on the performance of the dehumidifier. The moisture removal rate is decreased with increasing both air inlet temperature and desiccant temperature while increases with increasing air to solution mass ratio, inlet desiccant concentration, and inlet air humidity ratio.
除湿器是液体除湿空调系统的关键组成部分。在研究除湿器性能参数方面，解析解比数值解具有更多优势。本文介绍了绝热横流液体除湿空气除湿器的解析模型的出口参数的性能结果。本研究中使用氯化钙作为干燥剂材料。使用工程方程求解器软件开发了执行解析解的程序。在除湿器的除湿率方面，解析解与可靠的实验结果之间的最大偏差为+6.63%和-5.65%，发现具有良好的准确性。这里开发的方法可用于快速预测除湿器的性能。在空气温度和湿度、干燥剂温度和浓度以及空气与干燥剂流量等变量的影响下，评估了除湿器的出口参数。结果表明，热湿空气和干燥剂浓度对除湿器的性能影响最大。随着空气入口温度和干燥剂温度的升高，除湿率降低，而随着空气与溶液质量比、入口干燥剂浓度和入口空气湿度比的增加而增加。
