Numerical modeling and comparative study of different membrane-based liquid desiccant dehumidifiers
Numerical modeling and comparative study of different membrane-based liquid desiccant dehumidifiers
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DOI：
10.1016/j.enconman.2019.01.099
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发表时间：
2019-03
影响因子：
10.4
通讯作者：
H. Jafarian;Hoseyn Sayyaadi;F. Torabi
中科院分区：
文献类型：
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作者：
H. Jafarian;Hoseyn Sayyaadi;F. Torabi
建立了膜式液体除湿器的数值模型。该模型采用共轭方法，在膜和隔壁上计算出更接近实际的边界条件。这种边界条件是通过同时求解流动的动量、能量和质量传递方程来计算的。为了提高精确度，流体力学、热学和浓度方面的流动被认为是发展的。验证结果表明，该模型能够准确预测送风湿度的变化，误差小于3.22%。在此基础上，对横流、逆流、内冷和发展内冷四种膜式液体除湿装置进行了模拟研究。对不同进风条件下的除湿器性能进行了比较，结果表明所研制的内冷式除湿器具有最高的除湿效率。
A numerical model for membrane-based liquid desiccant dehumidifiers is presented. The model uses the conjugate method and calculates a more realistic boundary condition on the membrane, and the separating walls. This boundary condition is calculated by the simultaneous solution of momentum, energy, and mass transfer equations of flows. To increase accuracy, flows are considered hydrodynamically, thermally, and in concentration to be developing. The validation results showed that the model can accurately predict the humidity ratio change of the supply air with less than 3.22% error. Afterward, four membrane-based liquid desiccant dehumidifiers including cross-flow, counter-flow, internally cooled and developed internally cooled are modeled and investigated. The dehumidifiers performances are compared at different inlet air conditions, and the results indicate that the developed internally cooled dehumidifier has the highest effectiveness.