A proposed compressed air drying method using pressurized liquid desiccant and experimental verification
A proposed compressed air drying method using pressurized liquid desiccant and experimental verification
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DOI：
10.1016/j.apenergy.2014.12.015
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发表时间：
2015-03
期刊：
影响因子：
11.2
通讯作者：
Yonggao Yin;B. Zheng;C. Yang;Xiao-song Zhang
中科院分区：
文献类型：
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作者：
Yonggao Yin;B. Zheng;C. Yang;Xiao-song Zhang
提出了一种利用加压液体除湿剂进行压缩空气干燥的新方法。压缩空气干燥系统由压缩空气模块、加压液体除湿器、常压液体除湿再生器及其它辅助部件组成。建立了加压液体除湿器与压缩空气模块的实验装置，对所提出的空气干燥方法进行了实验验证。结果表明，在压力为0.5MPa时，出口空气中的水分含量可达0.9g/kg。在0.3MPa压力下，出口空气的含水率达到1.4g/kg，干燥系统的功耗为6.17kJ/g，比常规压缩空气冷却干燥系统降低0.69kJ/g和10.1%。除湿效率在0.90左右，说明加压除湿器中压缩空气与溶液之间的传质充分。此外，所提出的压缩空气干燥系统可以使用来自空气压缩机的低品位热量来再生稀释的干燥剂溶液。该新型空气干燥方法被验证为工业应用提供非常干燥的空气，并且与传统的压缩空气冷却干燥系统相比显示出显著的节能潜力。
A novel compressed air drying method using pressurized liquid desiccant is proposed in this paper. The compressed air drying system is consisted of a compressed air module, a pressurized liquid desiccant dehumidifier, a liquid desiccant regenerator working in an atmospheric pressure, and other auxiliary components. An experimental apparatus of the pressurized liquid desiccant dehumidifier associated with a compressed air module is established to verify the proposed air drying method experimentally. The results show that, under the pressure of 0.5 MPa, the moisture content in the outlet air can reach 0.9 g/kg. The moisture content of the outlet air reaches 1.4 g/kg under the pressure of 0.3 MPa, and the power consumption of the drying system is 6.17 kJ/g, which is 0.69 kJ/g and 10.1% lower than the conventional compressed air cooling drying system. The dehumidification efficiency is around 0.90, indicating the sufficiently mass transfer between compressed air and solution in pressurized dehumidifier. Besides, the proposed compressed air drying system can use the low-grade heat from the air compressor to regenerate the diluted desiccant solution. The novel air drying method is verified to offer very dry air for industrial application, and shows significant energy saving potential compared with the conventional compressed air cooling drying system.