回流式转轮除湿器热湿交换模型及数值模拟

Heat and math transfer mathematical model and numerical computation of rotary dehumidifier

建立了转轮除湿器的传热、传质数学模型并进行计算机数值模拟 .将回流式除湿器与无回流除湿器进行了除湿性能对比 .在给定除湿器参数基准条件下 ,再生气质量流量在 0～ 1 .5kg/(m2 ·s)范围内增加时 ,被处理气流出口含湿量下降较明显 .此时应用回流对除湿有利 .当再生温度小于 450K时 ,被处理气出口平均含湿量随着再生温度的增加而下降很快 ;当再生温度大于 450K时则下降很慢 .

The heat and mass transfer mathematical model of a rotary solid desiccant dehumidifier was presented. Some comparison were made between the scheme of using gas from the outlet dehumidified to regenerate solid adsorbent and the one without using gas from the outlet dehumidified to regenerate solid adsorbent. Some figures and laws have been got according to numerical simulation .On the given parameters of desiccant dehumidifier, the content of humid air decreases rapidly as the mass flow of regeneration air is increasing at 0～1.5?kg/(m 2·s). If T 2<450?K, the content of humid air decreases rapidly when T 2 is increasing. If T 2>450?K, the content of humid air decreases slowly when T 2 is increasing. The results can be applied to optimize the design of rot ary desiccant dehumidifier.