制冷技术2024，Vol.44Issue(1)：16-23,8.DOI:10.3969/j.issn.2095-4468.2024.01.103
纳米TiO2对NH3-H2O-LiBr工质降膜吸收性能的影响
Influence of Nano TiO2 on Falling Film Absorption of Ternary NH3-H2O-LiBr Working Fluid
摘要
Abstract
In order to investigate the impact of nano TiO2 on the falling film absorption of the ternary NH3-H2O-LiBr working fluid,the numerical analysis to establish a set of continuous equations governing mass,energy,and component mass balance in the falling film absorption process of the ternary working fluid is employed in this paper.Programming and computational simulations of the absorption performance of the nano fluid are conducted using Matlab software.The results are compared and validated against experimental data.Furthermore,a comprehensive analysis is undertaken to examine the influence of nano TiO2 mass fraction,initial ammonia concentration,initial temperature,cooling water inlet temperature,absorption pressure,and falling film tube length on the absorption performance.The findings indicate that the addition of nano TiO2 enhances the mass transfer rate in falling film absorption,primarily attributed to the increased diffusion coefficient of ammonia within the liquid film.The diffusion coefficient exhibits a significant increase of 3.44 times,6.42 times,and 11.76 times as the nano TiO2 mass fraction increases from 0%to 0.1%,0.3%,and 0.5%,respectively.Moreover,elevating the initial ammonia concentration,reducing the initial temperature,increasing the cooling water inlet temperature,or decreasing the absorption pressure positively impacts the saturation level of the final solution.关键词
降膜/吸收/纳米TiO2/NH3-H2O-LiBr/模拟研究Key words
Falling film/Absorption/TiO2 nanoparticles/NH3-H2O-LiBr/Simulation study分类
通用工业技术引用本文复制引用
李彦军,金正浩,李舒宏..纳米TiO2对NH3-H2O-LiBr工质降膜吸收性能的影响[J].制冷技术,2024,44(1):16-23,8.基金项目
国家自然科学基金(No.52276002),江苏省科技厅自然科学基金(No.BK20211386,No.BK20211171),江苏省市场监督管理局科研(No.KJ2022008). （No.52276002）
