Abstract:

Based on the laws of mass conservation and energy conservation, the regeneration performance prediction model of IH-UARS is established and verified by experiments. Besides, experimental runs were conducted to verify the feasibility of the developed model. The results show that there exists an optimal range of internal heating, which makes the regeneration system present the most energy-efficient regeneration. The optimal heating power was found increasing logarithmically with the growth of the flow rate of the desiccant solution but is weakly affected by the flow rate of the scavenging airflow. Under the standard operating conditions of the present study, the optimal heat power for IH-UARS was around 275 to 350 W. Furthermore, it was also found that the internal heating seems to be more beneficial for regenerating the dilute desiccant solution with a higher initial mass fraction. For instance, by increasing the internal heating power to 800 W, the \mathrm{D}\mathrm{M}\mathrm{F}{\mathrm{I}}_{G_l} of the desiccant solution, with inlet concentration of 36% was better than the desiccant solution with inlet concentration of 24%, with the improvement of \mathrm{D}\mathrm{M}\mathrm{F}{\mathrm{I}}_{G_l} amplitude reached 37%. The study may help realize the optimal running of the internally-heated desiccant regeneration system.

Key words: ultrasonic atomization, solution, regeneration, internally-heating power, optimal, building energy efficiency

摘要：

基于质量守恒、能量守恒定律，建立了内热型超声雾化溶液再生系统（IH-UARS）的再生性能预测模型并进行了充分的实验验证，通过研究不同内热量下IH-UARS的再生性能及其变化规律，寻求系统所需的最佳内热量并明确其可能的影响因素。结果表明：IH-UARS系统存在最优的内热量范围，使其再生系统性能最佳；所需最优内热量随着再生溶液流量增大呈显著的对数增长，但受空气流量的影响较弱；在该研究中的标准工况下，IH-UARS所需最优内热量约为275~350 W。此外研究发现：内热量的增长有益于促进初始浓度较高的溶液进一步浓缩再生，如当IH-UARS中内热量增至800 W时，其初始浓度为36%的溶液比24%的溶液浓度增量指标改善幅度高37%。研究所得结果可对提高溶液再生性能及经济性提供积极参考。

关键词: 超声雾化, 溶液, 再生, 内热量, 最优, 建筑节能