离子液体吸收式制冷工质对竖直管内降膜吸收特性与强化传质机制研究

项目名称： 离子液体吸收式制冷工质对竖直管内降膜吸收特性与强化传质机制研究

项目编号： No.51506104

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 陈伟

作者单位： 青岛科技大学

项目金额： 21万元

中文摘要： 离子液体吸收式制冷系统具有良好工业应用潜质和商业开发前景。工质对降膜吸收特性与强化传质机制研究是进行离子液体吸收式制冷系统吸收器尺寸设计与参数优化的直接理论基础。首先，采用数字全息激光干涉技术测量工质对溶液中制冷剂的扩散系数，并建立半经验的理论预测模型用以描述溶液的温度-浓度-扩散系数特性，为传质特性的研究奠定理论基础。然后，通过实验测试与理论研究为主、数值模拟为辅的方法，研究离子液体吸收式工质对竖直管内降膜吸收的传热传质特性，并建立相似准则关联式或相关理论预测模型。最后，通过实验与理论相结合的方法展开降膜吸收强化传质机制的研究，并制定合理、有效的强化方案。项目研究对于优化吸收式机组性能、实现机组小型化具有重要的指导意义和实用价值，并将为离子液体吸收式制冷系统的实体化和商业化奠定初步的理论基础。

中文关键词： 降膜吸收；离子液体；扩散系数；对流传热传质；强化传质

英文摘要： Ionic liquid absorption refrigeration systems possess great industrial application potential and commercial development prospects. The researches on absorption characteristic and mass transfer enhancement of falling film absorption in vertical tube for ionic liquid working pairs are the theoretical basis for the size design and parameter optimization of the absorber. Firstly, the diffusion coefficients of ionic liquid working pairs are measured by the digital holographic laser interference technique; and the semi empirical theoretical prediction model are built to describe the relationship of temperature-component-diffusion coefficient. This will lay the theoretical foundation for researched on mass transfer. Then, the researches of absorption characteristic of falling film absorption in vertical tube are conducted by experimental, theoretical method and numerical simulation. At last, the researches on mass transfer enhancement for falling film absorption are carried out, and the reasonable and effective schemes for mass transfer enhancement are developed. All the researches have important practical values and guiding significances for the performance optimization and miniaturization of the absorption chiller, and lay the preliminary foundation for the entity and commercialization of the ionic liquid absorption refrigeration system.

英文关键词： falling film absorption;ionic liquid;diffusion coefficient;convective heat and mass transfer;mass transfer enhancement