化工学报2023，Vol.74Issue(10)：4097-4108,12.DOI:10.11949/0438-1157.20230825
旋流作用下水基炭黑纳米流体集热性能研究
Study on the heat collection performance of water-based carbon black nanofluid under swirling flow
摘要
Abstract
Active reinforcement technology is an effective means to improve the efficiency of heat collectors.This study systematically investigated the effects of irradiation intensity,nanofluid concentration,rotor speed,number and arrangement of rotors,rotor color and type on the heat collection performance of water-based carbon black nanofluids under the action of swirling flow using a tubular active enhanced heat collection device.The results show that the photothermal conversion efficiency significantly increases with the increase of irradiation intensity.The addition of carbon black collagen protein increased the full range photothermal conversion efficiency of the medium by 56.6%to 216.7%during the same time period.The water-based carbon black nanofluid with a mass fraction of 0.005%had the highest photothermal conversion efficiency and higher energy efficiency ratio.At a rotor speed of 150 r/min,the full range photothermal conversion efficiency ultimately increased by 30.32%,and further increasing the rotor speed will not increase the heat collection efficiency of the nanofluid.When the rotors are evenly arranged,reducing the number of rotors by half will hardly affect the heat collection efficiency.The combination of rotor color and type has a synergistic effect on the heat collection efficiency of different concentrations of nanoluids.Black low flow resistance rotors have better heat collection effects in pure water and high concentration nanofluids,while the two white blade rotors have better heat collection effects in medium and low concentration nanofluids.This study clarifies the rules that affect the heat collection performance of nanofluid under rotor swirling flow,and provides new ideas for solar photothermal utilization.关键词
组合转子/动态集热/纳米粒子/传热/辐射Key words
assembled rotors/dynamic heat collection/nanoparticles/heat transfer/radiation分类
能源科技引用本文复制引用
于晓宇,安瑛,左夏华,李凯,张锋华,焦志伟,杨卫民..旋流作用下水基炭黑纳米流体集热性能研究[J].化工学报,2023,74(10):4097-4108,12.基金项目
国家自然科学基金项目(52176175) （52176175）
