除湿转轮除湿性能及效率分析

Analysis of performance and exergy efficiency of rotary wheel

建立了除湿转轮[火用]效率模型，应用除湿转轮传热传质数学模型和实验装置分析了通道中湿空气的[火用]及[火用]效率，研究了影响[火用]效率及除湿性能的因素．结果显示：吸附通道中作为收益的扩散丸甩所占比例较小。表明除湿转轮的炯效率较低，回收再生过程排气中的热丸用可以提高装置[火用]用效率；当传递单元数NTU在0～2．5时，除湿转轮的[火用]效率及除湿性能随NTU的增加而迅速升高，当NTU〉2．5时，这一趋势变缓；除湿转轮在最佳转速下运行时其除湿性能及[火用]效率同时达最大；提高再生温度可以提高除湿转轮的除湿性能，但其[火用]效率却随再生温度的增加而下降．

The exergy efficiency model of rotary wheel is presented, and the exergy and exergy efficiency of channel are analyzed using a one-dimensional coupled heat and mass transfer mathematical model and experimental setup based on adsorption channel. The factors of influence on the performance and exergy efficiency, the number of transfer units （ NTU）, the rotary speed and the regenerative temperature, are investigated using exergy efficiency model, and results show the exergy efficiency is lower because the proportion of chemical exergy component, which is interest, is low, and recovery thermal exergy of regenerative process can rise its exergy efficiency. When the NTU is in 0 - 2.5, both the performance and exergy efficiency increase rapidly with an increasing NTU, however, when the NTU is bigger than 2.5, a further increasing of NTU will have little merit. Both the performance and exergy efficiency are the biggest under the optimal rotary speed. The power of dehumidification increases and exergy efficiency decreases when regenerative temperature is rising.