| Mechanical and Electrical Engineering |
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| Experimental study on performance of liquid cooling garment with application of titanium dioxide nanofluids |
| WANG Tao1,2, WANG Liang3, LIN Gui ping1, BAI Li zhan1,4, LIU Xiang yang2, BU Xue qin1, XIE Guang hui2 |
| 1. Laboratory of Fundamental Science on Ergonomics and Environment Control, Beihang University, Beijing 100191, China; 2. China Astronaut Research and Training Center, Beijing 100094, China; 3. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; 4. School of Chemical and Process Engineering, University of Leeds,Leeds LS2 9JT, UK |
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Abstract The experimental study for the performance of liquid cooling garment (LCG) with the application of TiO2 nanofluids was conducted in order to better understand and utilize the characteristics of enhancing heat transfer for nanofluids applied in LCG. A thermal manikin system was employed to simulate heating from a human body. The performance of the LCG with TiO2 nanofluids as the working fluid was compared with water by a variety of aspects such as heat dissipation, temperature control and pump power consumption under both steady state and transient conditions. Experimental results show that the inlet temperature, mass flow rate and volume fraction of TiO2 nanofluids are three key parameters affecting the performance of the LCG, which can be significantly enhanced by a proper combination of these parameters. If the parameters not matching, the performance of the LCG will deteriorate or even be worse than that using water as the working fluid. When the inlet temperature, mass flow rate and volume fraction of TiO2 nanofluids were selected as 15 ℃, 1 000～1 400 g/min and 2% respectively, the heat dissipation of the LCG was enhanced by up to 6% compared with using water. The pump power declined about 0.70～0.80 times of water. Both the temperature distribution in the thermal manikin LCG system and the capability for adapting abrupt heat load change were improved.
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Published: 01 April 2016
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TiO2纳米流体在液冷服上的应用实验研究
为了更好地理解与运用纳米流体在液冷服上的强化传热能力,开展TiO2纳米流体在液冷服上的试验研究.利用暖体假人系统模拟人体散热,从人服系统的稳态和瞬态两种情形对应用TiO2纳米流体液冷服在散热、温控、能耗等性能上与应用水的情形进行对比分析.结果表明：应用TiO2纳米流体的液冷服工作性能受工质进口温度、质量流量和纳米颗粒体积分数的影响很大,通过合理匹配以上参数可以提高液冷服的工作性能；若上述参数匹配不当,则将导致液冷服的工作性能恶化,甚至出现低于应用传统工质水的情形.在该实验条件下,当纳米颗粒体积分数为2%,入口温度为15 ℃,质量流量为1 000～1 400 g/min时,液冷服的散热能力比以水为工质时提高6%；所需的泵耗显著降低,为水的0.70～0.80倍；人服系统温度分布和液冷服抗热负荷能力均有所改善.
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