Development of Fluidized Bed Heat Exchanger Using Organic Powder

实验研究了聚丙烯酸钠桥联络合物组成的粉末型有机吸附剂作为一种新型吸附材料的热物理性质和动态吸附/脱附特性。用暂态热线法测量了不同温度和湿度下的有效导热系数。利用流态化系统测试了该粉末吸附剂的动态吸附/脱附特性。将粉末吸附颗粒装入一个矩形容器中，空气从容器底部排出。实验是在不同的气温、相对湿度和流速条件下进行的。结果表明，湿空气进入粉末吸附颗粒层的吸附和脱附过程均为等热焓变化。最后，用雷诺数、施密特数、吸附水汽质量比和斯特凡数对传质的舍伍德数和吸附、解吸过程的无量纲完成时间进行了关联。

Experimental investigations has been performed to determine thermophysical properties and dynamic adsorption/desorption characteristics of powder type organic absorbent composed bridged complex of sodium polyacrylate as a new kind of adsorption material. The effective thermal conductivity was measured with the transient hot wire method under various temperature and humidity of the powder absorbent. The dynamic adsorption/desorption characteristics of the powder adsorbent were also measured by using fluidized bed system. The powder adsorbent particles were packed into a rectangular vessel, and the air was flown from the bottom of the vessel. The experiments were carried out under various air temperature, relative humidity and flow velocity conditions. It was found that both adsorption and desorption processes of passing a moist air into the powder adsorbent particles layers were the isoenthalpy change. Finally, the obtained data of Sherwood number for mass transfer and nondimenional completion time for adsorption and desorption processes were correlated by means of Reynolds number, schmidt number, adsorbed water vapor mass ratio, and Stefan number.