片状二氧化钛纳米颗粒对热管及热管散热器工作性能的影响
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摘要
利用水热法制备片状二氧化钛纳米颗粒,两步法制备片状二氧化钛/水纳米流体。制作了外径为6mm和长度为200mm的充有片状二氧化钛/水纳米流体热管,组装了一个具有2根热管和20片翅片的热管散热器,探讨了片状二氧化钛纳米颗粒对热管及其散热器工作性能的影响。结果发现二氧化钛纳米流体热管的温差明显地小于水热管的。在加热系统温度为50～80℃范围内,片状二氧化钛纳米流体热管的热阻比水热管热阻降低了14.0%～35.9%。考察热管散热器发现片状二氧化钛/水纳米流体热管散热器的翅片表面温度高于水热管翅片上的表面温度,末端翅片散热量比水热管翅片散热量增强31.3%～46.6%。
Having the hydrothermal method adopted to synthesize the flake titanium dioxide nanoparticles was implemented, including having the two-step method used to prepare the flake titanium dioxide/water nanofluids. Fabricating a 200 mm-long heat pipe with 6 mm in outer diameter and being filled with flake titanium dioxide/water nanofluids and assembling a radiator with two heat pipes and 20 pieces of rectangular aluminum fins to investigate the effects of flaky titanium dioxide nanoparticles on the performance of heat pipe and heat pipe radiators show that, the temperature difference of titanium dioxide nanofluid heat pipe is lower than that of water heat pipe; when the heating temperature ranges between 50℃ and 80℃, the thermal resistance of the heat pipe with flake titanium dioxide nanofluids can be reduced by 14.0% to 35.9% as compared to the water heat pipe. Observing the heat pipe radiator with titanium dioxide/water nanofluids, the rectangular aluminum fins' surface temperatures are higher than those of the water heat pipe. A fin heat dissipating capacity of the heat pipe radiator filled with titanium dioxide/water nanofluids has an increase between 31.3% and 46.6% compared with water heat pipe radiator.
Having the hydrothermal method adopted to synthesize the flake titanium dioxide nanoparticles was implemented, including having the two-step method used to prepare the flake titanium dioxide/water nanofluids. Fabricating a 200 mm-long heat pipe with 6 mm in outer diameter and being filled with flake titanium dioxide/water nanofluids and assembling a radiator with two heat pipes and 20 pieces of rectangular aluminum fins to investigate the effects of flaky titanium dioxide nanoparticles on the performance of heat pipe and heat pipe radiators show that, the temperature difference of titanium dioxide nanofluid heat pipe is lower than that of water heat pipe; when the heating temperature ranges between 50℃ and 80℃, the thermal resistance of the heat pipe with flake titanium dioxide nanofluids can be reduced by 14.0% to 35.9% as compared to the water heat pipe. Observing the heat pipe radiator with titanium dioxide/water nanofluids, the rectangular aluminum fins' surface temperatures are higher than those of the water heat pipe. A fin heat dissipating capacity of the heat pipe radiator filled with titanium dioxide/water nanofluids has an increase between 31.3% and 46.6% compared with water heat pipe radiator.
引文
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[2] Ghanbarpour M,Nikkam N,Khodabandeh R,et al.Thermal Performance of Screen Mesh Heat Pipe with Al2O3 Nanofluid[J].Experimental Thermmal Fluid Science,2015,66:213～220.
[3] Moraveji M K,Razvarz S.Experimental Investigation of Aluminum Oxide Nanofluid on Heat Pipe Thermal Performance[J].International Communications in Heat and Mass Transfer,2012,39(9):1444～1448.
[4] Gunnasegaran P,Zulkifly M,Zamri M.Optimization of SiO2 Nanoparticle Mass Concentration and Heat Input on a Loop Heat Pipe[J].Case Studies in Thermermal Engineering,2015,6:238～250.
[5] Shi J Y,Zhao W L,Li J K,et al.Heat Transfer Performance of Heat Pipe Radiator with SiO2/Water Nanofluids[J].Heat Transfer-Asian Reasearch,2017,46(7):1053～1064.
[6] Niu Y F,Zhao W L,GongY Y.Experimental Investigation of Thermal Performance of Miniature Heat Pipe Using SiO2-Water Nanofluids[J].Journal of Nanoscience and Nanotechnology,2015,15(4):2932～2938.
[7] Kumaresan G,Venkatachalapathy S,Asirvatham L G,et al.Comparative Study on Heat Transfer Characteristics of Sintered and Mesh Wick Heat Pipes Using CuO Nanofluids[J].International Communications in Heat and Mass Transfer,2014,57:208～215.
[8] Kole M,Dey T K.Thermal Performance of Screen Mesh Wick Heat Pipes Using Water-Based Copper Nanofluids[J].Applied Thermal Engineering,2013,50(1):763～770.
[9] Senthilkumar R,Vaidyanathan S,Sivaraman B.Effect of Inclination Angle in Heat Pipe Performance Using Copper Nanofluid[J].Procedia Engineering,2012,38:3715～3721.
[10] 黄素逸,李中洲,黄锟剑,等.纳米材料在热管中的应用[J].华中科技大学学报(自然科学版),2006,34(5):105～107.
[11] Richardson A V,Karthikeyan M G,Kannan C,et al.Heat Transfer Enhancement of Heat Pipe Using TiO2 Nanofluid[J].International Journal of Engineering Research,2015,3(1):294～303.
[12] Saleh R,Putra N,Wibowo R E,et al.Titanium Dioxide Nanofluids for Heat Transfer Applications[J].Experimental Thermal and Fluid Science,2014,52:19～29.
[13] Manimaran R,Palaniradja K,Alagumurthi N,et al.Experimental Comparative Study of Heat Pipe Performance Using CuO and TiO2 Nanofluids[J].International Journal of Energy Research,2014,38(5):573～580.
[14] Asirvatham L G,Nimmagadda R,Wongwises S.Heat Transfer Performance of Screen Mesh Wick Heat Pipes Using Silver-Water Nanofluid[J].International Journal of Heat and Mass Transfer,2013,60:201～209.
[15] Ghanbarpour M,Nikkam N,Khodabandeh R,et al.Thermal Performance of Inclined Screen Mesh Heat Pipes Using Silver Nanofluids[J].International Communications in Heat and Mass Transfer,2015,67:14～20.
[16] Wang W Z,Duan G B,Li J K,et al.The Preparation and Thermal Performance Research of Spherical Ag-H2O Nanofluids & Applied in Heat Pipe[J].Applied Thermal Engineering,2017,116:811～822.
[17] Sadeghinezhad E,Mehrali M,Rosen M A,et al.Experimental Investigation of the Effect of Graphene Nanofluids on Heat Pipe Thermal Performance[J].Applied Thermal Engineering,2016,100:775～787.
[18] Kim K M,Bang I C.Effects of Graphene Oxide Nanofluids on Heat Pipe Performance and Capillary Limits[J].International Journal Thermal Science,2016,100:346～356.
[19] Xue H S,Fan J R,Hu Y C,et al.The Interface Effect of Carbon Nanotube Suspension on the Thermal Performance of a Two-Phase Closed Thernosyphon[J].Journal of Applied Physics,2006,100(10):104909.
[20] 郭广亮,刘振华.碳纳米管悬浮液强化小型重力型热管换热特性[J].化工学报,2007,58(12):3006～3010.
[21] 辛帅.不同形貌二氧化钛纳米流体的制备及其热物性能研究[D].济南:济南大学,2017.