The conventional fluids used for heat transfer can not provide the desired thermal performance due to their poor heat transfer characteristics. Disadvantages of the base fluids can be overcome by forming a suspension of nanoparticles with the base fluid. In this work, the effects of using dolomite/deionized water nanofluid on thermal performance of thermosyphon heat pipe were experimentally investigated. Nanoparticle concentration and surfactant type (Sodium Dodecyl Benzene Sulfonate (SDBS), Triton X-100) were studied as parameters. Three different cooling water mass flow rates (5, 7.5 and 10 g/s) were used in experiments with different heating powers (200, 300, 400 W) to test heat pipe performance. The results indicated that nanoparticle concentration is effective parameter on the performance of nanofluids and SDBS exhibit more favorable characteristics than Triton X-100 as a surfactant. It was observed 36.84 % decrease in thermal resistance compared to deionized water and enhancement of 38.75% was achieved in heat pipe efficiency using of dolomite nanofluid containing 2% of dolomite nanoparticle and 0.5% of SDBS under a heating power of 200 W and cooling water mass flow rate of 5 g/s.

中文翻译：

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白云石/去离子水纳米流体对纳米管浓度和表面活性剂类型影响的热虹吸管热性能实验研究

用于传热的常规流体由于其不良的传热特性而不能提供所需的热性能。基础流体的缺点可以通过与基础流体形成纳米颗粒的悬浮液来克服。在这项工作中，实验研究了使用白云石/去离子水纳米流体对热虹吸热管的热性能的影响。研究了纳米粒子的浓度和表面活性剂类型（十二烷基苯磺酸钠（SDBS），Triton X-100）作为参数。在具有不同加热功率（200、300、400 W）的实验中，使用了三种不同的冷却水质量流量（5、7.5和10 g / s）来测试热管性能。结果表明，纳米粒子的浓度是影响纳米流体性能的有效参数，并且SDBS表现出比Triton X-100作为表面活性剂更好的特性。观察到与去离子水相比，热阻降低了36.84％，并且在200 W的加热功率和冷却​​水量下，使用含有2％白云石纳米颗粒和0.5％SDBS的白云石纳米流体，热管效率提高了38.75％。流量为5 g / s。