双转轮除湿系统设计及其性能影响因素分析

Design of dual-wheel dehumidification system and influencing factors analysis on its performance

提出一种结合除湿转轮和冷热水盘管的双转轮除湿系统方案,在相同的运行工况下模拟计算该方案与单转轮除湿系统性能并进行对比,分析冷热源温度和再生侧风量的变化对双转轮除湿系统的性能影响。结果表明:相对于单转轮除湿系统,双转轮除湿系统的冷源温度可提高3.5~4.0℃,冷水机组的性能系数提高11%以上,整个除湿系统的单位输入功率除湿量提高4.5%以上,在深度除湿领域节能效果更明显;随着冷源温度的降低,除湿系统的除湿能力提高,但冷水机组的性能系数和单位输入功率除湿量降低;随着再生热源温度升高,除湿系统除湿能力提高,但冷水机组的性能系数和单位输入功率除湿量降低;再生侧风量约为除湿侧风量的70%~100%时,系统可得到最大的除湿量和较佳的单位输入功率除湿量。

The scheme of dual-wheel dehumidification system combined dehumidifica-tion wheel and cold & hot water coils is put forward,and its performance is simulated and compared with that of single wheel dehumidification system under the same operation condition.The influences of cold and heat source temperature and regeneration airflow on the performance of dual-wheel dehumidification system are also analyzed.The results show that compared with the single wheel dehumidification system,the cold source temperature of dual-wheel dehumidification system can be increased by 3.5-4.0 ℃,the coefficient of performance of water chiller can be improved by more than 11%,and the dehumidification amount per unit input power of total dehumidification system is improved by more than 4.5%.The energy-saving effect is more obvious in deep dehumidification field.With the decrease of cold source temperature,the dehumidification capacity of the dehumidification system increases,while the coefficient of performance of water chiller and the dehumidification amount per unit input power decrease.With the increase of the regeneration heat source temperature,the dehumidification capacity of the system increases,while the coefficient of performance of water chiller and the dehumidification amount per unit input power decrease.When the regeneration side air volume is about 70% to 100% of the dehumidification side air volume,the system can obtain the maximum dehumidification capacity and better dehumidification amount per unit input power.