Numerical Investigation of Heat and Mass Transfer in Nanofluid-Filled Porous Medium

In this work, we numerically study the laminar mixed convection of fluid flow in a vertical channel filled with porous media during the drying process. The porous medium, modeled as a vertical wall, consists of solid and nanofluid phase (Water-Al2O3 or Water-Cu), as well as a gas phase. The established model is developed based on Whitaker’s theory and resolved by our numerical code using Fortran. Results principally show the influence of various physical parameters, such as nanoparticle volume fraction, ambient temperature, and saturation on heat and mass transfer on the drying process. This study brings the effect of the presence of nanofluids in porous media. It contributes not only to our fundamental understanding of drying processes but also provides practical insights that can guide the development of more efficient and sustainable drying technologies. .

浅析350MW等级超临界风扇磨锅炉设计研究

本文分析研究了高水分褐煤对锅炉设备和制粉系统的选型的影响,对风扇磨锅炉设计特点,整体布置方案、制粉系统、烟气余热系统的设计等问题进行了探讨。研究表明采用三介质风扇磨制粉系统很容易达到干燥出力,采用较低的炉膛截面、容积热负荷较合理。提出了高温炉烟系统和抽烟口设计的要点。

350MW等级超临界风扇磨塔式锅炉的设计研究

分析和研究风扇磨塔式锅炉设计特征,对锅炉的整体布置方案、制粉系统、高温炉烟系统和燃尽炉排系统的设计等问题进行了探讨。介绍高水分褐煤制粉系统选型的关键技术。另外,对风扇磨锅炉在运行中出现的问题提出了相对应的解决方案。