| 摘要: |
| 再生器性能对溶液除湿系统的能效具有重要影响。超声波雾化再生器因具有很高的溶液比表面积而有望在溶液除湿系统中得到推广应用。本文对超声波雾化再生技术进行相关理论研究，在一定假设前提下，建立了超声波雾化再生器模型，并进行实验验证；提出除湿溶液再生能效指标——比能耗（SEC），模拟分析了进口溶液温度和质量浓度、再生空气温度和湿度对超声波雾化再生器能效特性的影响。研究表明：1）较低的溶液进口温度有利于提升溶液再生器的能效，但溶液进口温度的下限值应满足溶液再生后的使用条件要求；2）溶液再生SEC随除湿溶液质量浓度的增加而明显增大，当溶液质量浓度从0.28增加至0.33时，溶液单位再生量的能耗将提高近40%；3）较高的再生空气温度将导致溶液再生能效下降，当再生空气由30 ℃加热至41 ℃时，溶液的再生SEC从3.263 kJ/g增加至4.629 kJ/g；4）较高的再生空气湿度将导致较高的再生能耗，当进口再生空气含湿量从10 g/(kg干空气）增至28 g/(kg干空气）时，溶液再生SEC从3.23 kJ/g增至10.56 kJ/g。 |
| 关键词: 液体除湿剂 再生器 超声波雾化 比能耗(SEC) |
| DOI： |
| 投稿时间：2017-05-17
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| 基金项目: |
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| Model and Energy Consumption Characteristics of Liquid Desiccant Regenerator with Ultrasonic Atomization |
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Chen Jing1,2, Yao Ye3, Zhu Zhengyuan3
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| (1.Nanjing Vocational Institute of Transport Technology;2.Jiangsu Engineering Technology Research Center for Energy Conservation and Emission Reduction of Transportation;3.Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University) |
| Abstract: |
| A regenerator has a significant influence on the energy efficiency of a liquid desiccant system. A conventional packed regenerator has a low specific surface area, which leads to the huge size of the equipment. An ultrasonic atomization method can greatly increase the specific surface area of a regenerator through atomizing the liquid desiccant into micron droplets, which will certainly reduce the equipment size. For the sake of development of ultrasonic atomization regeneration technology, this paper describes a theoretical study conducted on an ultrasound-atomizing regenerator. A model for the ultrasound-atomizing regenerator was established based on some necessary assumptions, and the model was validated experimentally. An index of specific energy consumption (SEC) is also suggested, and the model is used to investigate the energy consumption characteristics of an ultrasound-atomizing regenerator under different regeneration conditions, including the inlet solution temperature and concentration, as well as the inlet regeneration air temperature and humidity. The following conclusions can be drawn from this study: 1) A lower solution temperature is beneficial to improving the efficiency of an ultrasound-atomizing regenerator, but it should satisfy the practical application requirements of liquid desiccant after the regeneration. 2) The SEC of the regeneration of the liquid desiccant shows a clear increase with an increase in the inlet solution concentration. The SEC increases by nearly 40% as the solution concentration increases from 0.28 to 0.33. 3) A higher regeneration air temperature will lead to lower energy efficiency. The SEC of the solution regeneration increases from 3.263 to 4.629 kJ/g as the regeneration air temperature increases from 30 to 41 ℃ under the conditions applied in this study. 4) The higher regeneration air humidity will lead to higher energy consumption. Under the simulation conditions described herein, the SEC of the solution regeneration increases from 3.23 to 10.56 kJ/g as the regeneration air humidity increases from 10 to 28 g/kg (dry air). |
| Key words: liquid desiccant regenerator ultrasonic atomization specific energy consumption (SEC) |
