| 摘要: |
| 根据降膜吸收传质双膜模型，分析了氨气热量、质量和动量传递过程中相关物理量的变化规律和传递机理。建立了氨气降膜吸收过程能量、质量守恒方程组，使方程组离散化，然后利用Gauss-Seidel迭代法求解。得到了光滑管和横纹管降膜吸收氨水溶液氨质量分数沿降膜管高度的变化曲线。并绘出了横纹管降膜吸收过程氨水溶液和冷却水模拟计算温度随降膜管无量纲高度的变化曲线。横纹管相比光滑管在相同工况下有较强的降膜吸收性能，吸收能力在冬夏季节分别提高了118.5%和167.7%。实验结果表明，2号横纹管氨水溶液与冷却水沿降膜管高度的模拟计算温度与测量温度在溶液降膜吸收过程中吻合良好。 |
| 关键词: 氨水 降膜 吸收 温度场 质量分数 横纹管 |
| DOI： |
| 投稿时间：2013-01-04
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| 基金项目:高等学校博士学科点专项科研基金（20093120110003）资助项目 |
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| Calculation and Measurement of Temperature Field and Mass Fraction Field about Aqua Ammonia Falling Film Absorption based on Transversally Grooved Tube |
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Chen Xiaozhuan1,2, Liu Jianhua1, Zhang Liang1, Wang Huan1, Liu Qi1
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| (1.School of Energy and Power Engineering, University of Shanghai for Science and Technology;2.School of Mechanical and Power Engineering, Henan Polytechnic University) |
| Abstract: |
| According to double membrane mass transfer model of falling film absorption, change law and transport mechanism were analyzed on related physical quantities during ammonia’s heat, mass and momentum transfer process. Energy and mass conservation equations were established for ammonia gas falling film absorption, and equations discretization was made. Subsequently Gauss-Seidel iterative method was used to solve these equations. Variation curve of aqua ammonia solution mass fraction along falling film tube height was obtained about smooth tube(SMT) and transversally grooved tube(TGT). The temperature of aqua ammonia and cooling water at different dimensionless height was obtained for falling film absorption of transversally grooved tube. TGT has strong falling film absorption performance in the same conditions compared with that of SMT. Absorptive capacity in winter and summer season increased by 118.5% and 167.7% respectively. The experimental results showed that the predicted temperatures of aqua ammonia and cooling water agree well with the measured temperature in the falling film absorption process. |
| Key words: aqua ammonia falling film absorption temperature field mass fraction transversally grooved tube |
