用于直接吸收式太阳能集热器的TiN纳米流体性能  

Performance of TiN nanofluids in direct absorption solar collectors

作　　者：韩新月[1] 王璐 HAN Xinyue;WANG Lu(School of Energy and Power Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China)

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《江苏大学学报(自然科学版)》2025年第2期172-178,共7页Journal of Jiangsu University:Natural Science Edition

基　　金：国家自然科学基金资助项目(51776091);中国博士后科学基金资助项目(2019M661741);江苏省博士后科研项目(2021K623C)。

摘　　要：为了研究TiN纳米流体在直接吸收式集热器(DASC)内的光热转换性能,首先使用聚丙烯酸(PAA)表面活性剂制备了乙二醇基TiN-PAA纳米流体,将该纳米流体在室温下静置观察其长期稳定性,发现100 mg/L TiN-PAA纳米流体静置310 d后,平均光谱透过率仅上升1.908%.然后研究了TiN-PAA纳米流体在DASC内的光热转换性能,分别讨论了纳米颗粒质量浓度、体积流量和光强对其光热转换性能的影响,结果表明:在光照2.0 h后,相比基液,纳米流体的最终温度和效率得到显著提高,100 mg/L TiN-PAA纳米流体的最终温度为80.12℃;纳米流体的效率随着体积流量的增加而增加,当体积流量从1 mL/min增加到3 mL/min时,75 mg/L TiN-PAA纳米流体的效率增加了32.69%;随着光强的增加,TiN-PAA纳米流体的效率逐渐降低,当光强为800 W/m^(2)时,75 mg/L TiN-PAA纳米流体的效率达到了69.10%.To investigate the photo-thermal conversion performance of TiN nanofluid in the direct absorption solar collectors(DASC),the ethylene glycol(EG) based TiN nanofluid with polyacrylic acid(PAA) stabilizing ligand was prepared.The long-term stability of the TiN-PAA nanofluid was characterized by conducting the static storage test at ambient conditions to show that the average transmittance of the TiN-PAA nanofluid with 100 mg/L was increased by 1.908% after ambient storage for 310 days.The photo-thermal conversion performance of the TiN-PAA nanofluid in DASC was evaluated.The effects of nanoparticles concentration,mass flow rate and irradiation intensity on photo-thermal conversion performance of the collector with TiN-PAA nanofluid were discussed.The results indicate that the stagnation temperature and efficiency of the TiN-PAA nanofluid are much higher than those of the base fluid EG after 2.0 h irradiation,and the stagnation temperature of TiN-PAA nanofluid with 100 mg/L is 80.12 ℃.The efficiency of TiN-PAA nanofluid is improved with the increasing of mass flow rate,and the efficiency of 75 mg/L TiN-PAA nanofluid is increased by 32.69% as the mass flow rate is increased from 1 mL/min to 3 mL/min.However,the efficiency of TiN-PAA nanofluid is decreased as the irradiation intensity is increased.The efficiency of the 75 mg/L TiN-PAA nanofluid reaches 69.10% when the irradiation intensity is 800 W/m^(2).

关 键 词：太阳能 光热转换 太阳能集热器 TiN纳米颗粒 稳定性 

分 类 号：TK519[动力工程及工程热物理—热能工程]