A novel liquid desiccant dehumidification system driven by low-temperature heat for industrial application

作者：Su Bosheng; Han Wei^*; Sui Jun; Jin Hongguang

来源：8th International Conference on Applied Energy (ICAE), 2016-10-08 To 2016-10-11.

DOI：10.1016/j.egypro.2017.03.566

• Low-temperature Utilization
• liquid desiccant dehumidification
• energy saving
• driven force difference
• parametric analysis

Cooling dehumidification driven by power is widely used in industrial process to obtain dry air, however, the main drawback is the large power consumption. At the same time, large amount of low-temperature waste heat is released to environment directly. There is a great energy saving potential to recover low-temperature waste heat and generate dry air. A novel two-stage liquid desiccant dehumidification system with cascade utilization of a low-temperature heat is proposed. The waste heat is used in a cascade way. The higher temperature heat is used to generate strong desiccant solution, which will be used in first stage dehumidifier. The lower temperature heat is used to drive a single-effect absorption refrigerator and provide cooling energy to the second stage dehumidifier. Simulation results showed that the proposed system can save 96.17% electricity consumption, compared with the conventional cooling dehumidification system driven by power. The ratio of saving electricity and absorbed heat can reach 6.67%. Furthermore, the advantage of cascade utilizing low-temperature heat was elucidated by studying the driven force in the dehumidifiers. This study may provide a new way to perform dehumidification by efficiently using a low-temperature waste heat.

• 出版日期2017
• 单位中国科学院; 中国科学院大学