| 摘要: |
| 在碳中和背景下，减少能源消耗、提高暖通运行能效和净化效率是在新时代亟需解决的问题。本文研究了载银二氧化钛（TiO2?-Ag）纳米流体的气液传热传质性能，探索了纳米流体在鼓泡、喷雾、填料等不同流动状态下的传热传质特性，分析了系统参数对传热传质效果的影响。结果表明：鼓泡工况相对于喷雾与填料工况的气液传热效果更好，其中气体流量的设定应同时考虑纳米流体稳定性和气液接触时间等因素来获得最佳效果，因此在本实验的设定中，选定最佳进口气体流量为4 L/min。 |
| 关键词: 纳米流体 载银二氧化钛 强化传热 空气净化 |
| DOI： |
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| 基金项目:国家自然科学基金(51876040,52176061);深圳市科技计划- 基础研究自由探索项目
(JCYJ20180306174450120) |
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| Experimental Study on the Enhancement of Gas-liquid Heat and Mass Transfer with TiO2-Ag Nanofluids |
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Mao Mao1, Bian Chengle1, Cai Zhanhao1, Li Ningjun1, Ma Xin1, Ji Weikai1, Yang Liu1,2
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| (1.School of Energy and Environment, Southeast University;2.Shenzhen Research Institute, Southeast University) |
| Abstract: |
| With carbon neutrality becoming the strategic goal leading the sustainable development in China, reducing energy consumption and improving the efficiency and purification efficiency of HVAC systems are urgent issues that need to be resolved in the new era. The gas-liquid heat and mass transfer performance of TiO2-Ag nanofluid was investigated; the heat and mass transfer characteristics of nanofluids in different fluent states such as “bubbling” “spraying” and “filling” were explored; and the effects of the system parameters on the enhancement of heat and mass transfer were analyzed. The results show that the bubbling condition has a better gas-liquid heat transfer effect than the spray and filling conditions. Consequently, the setting of the gas flow rate should consider both the stability and gas-liquid contact time to obtain the best heat and mass transfer effects. Therefore, in this experiment, the optimal inlet gas flow rate was set to 4 L/min. The system showed an effectively enhanced heat and mass transfer and could serve as a significant reference for engineering applications. |
| Key words: nanofluids TiO2-Ag heat transfer enhancement air purification |
