Seong HeonJin, Kim GwiNam, Jeon JongHoon, Jeong HyoMin, Noh JungPil, Kim YoungJu, Kim HyunJi, Huh SunChul
Department of Energy and Mechanical Engineering, Gyeongsang National University, 38, Cheondaegukchi-gil 53064, Tongyeong-si, Korea.
Department of Mechanical & Automotive Engineering, Suncheon Jeil College, 17 Jeildaehak-gil 57997, Suncheon-si, Korea.
Materials (Basel). 2018 Jun 4;11(6):950. doi: 10.3390/ma11060950.
In earlier studies, much research has focused on increasing the efficiency of heat exchanger fields. Therefore, in this study, graphene nanofluid was fabricated for use as a heat transfer medium for a heat exchanger. Graphene has excellent electrical conductivity, mechanical properties, and heat transfer properties. It is expected that the heat transfer efficiency will be improved by fabricating the nanofluid. However, graphene is prone to sedimentation, because of its cohesion due to van der Waals binding force. In this experiment, a nanofluid was fabricated with enhanced dispersibility by surfactant and the ball-milling process. The zeta potential, absorbance, and thermal conductivity of the nanofluid were measured. As a result, when using the ratio of 2:1 (graphene:sodium dodecyl sulfate (SDS)), a higher thermal conductivity was obtained than in other conditions.
在早期研究中，许多研究都集中在提高热交换器领域的效率。因此，在本研究中，制备了石墨烯纳米流体用作热交换器的传热介质。石墨烯具有优异的导电性、机械性能和传热性能。预计通过制备纳米流体可提高传热效率。然而，由于范德华力导致的凝聚作用，石墨烯容易发生沉降。在本实验中，通过表面活性剂和球磨工艺制备了具有增强分散性的纳米流体。测量了纳米流体的zeta电位、吸光度和热导率。结果表明，当使用2:1（石墨烯:十二烷基硫酸钠（SDS））的比例时，获得了比其他条件下更高的热导率。
