Improving the thermal performance of diffusion absorption refrigeration system with alumina nanofluids: An experimental study
Improving the thermal performance of diffusion absorption refrigeration system with alumina nanofluids: An experimental study
复制标题
DOI：
10.1016/j.ijrefrig.2014.04.018
复制
发表时间：
2014-08
期刊：
影响因子：
--
通讯作者：
A. Sözen;Engin Özbaş;T. Menlik;M. Çakir;M. Gürü;K. Boran
中科院分区：
文献类型：
--
作者：
A. Sözen;Engin Özbaş;T. Menlik;M. Çakir;M. Gürü;K. Boran
在这项研究中，氨/水与氧化铝（Al 2 O3）纳米尺寸的颗粒的被动传热改善方法的效果进行了研究，在扩散吸收冷却器关于系统的热性能。将纳米颗粒添加到流体中导致传热的显著改善，因为纳米颗粒增加了流体的表面积和热容。因此，在这项研究中，冷却/吸收液与Al 2 O3纳米粒子的混合物及其对系统性能的影响进行了评估。实验结果表明，具有纳米颗粒的系统提供了对来自发生器的热量的更好的吸收以及冷却剂从冷却/吸收流体的更快的蒸发。考虑到流体中含有纳米颗粒的影响，在系统中的传热的连接单元进行了研究。据观察，系统的操作时间减少，由于较短的传热周期。因此，它导致更快地获得期望的温度。
In this study, the effect of the passive heat transfer improvement method of ammonia/water couple with alumina (Al2O3) particles in nano-size were examined in diffusion absorption coolers regarding to the heat performance of the system. Adding nanoparticles into fluid leads to significant improvement in heat transfer since the surface area and heat capacity of the fluid increase due to nanoparticles. Therefore, in this study cooling/absorption fluid mixtures with Al2O3nanoparticles and their impact on system performance were assessed. The results of experiments indicated that the system with nanoparticles provided better absorption of heat from the generator and faster evaporation of the cooler from the cooling/absorption fluid. The connection units of the heat transfer in the system were investigated considering the effect of fluids containing nanoparticles. It was observed that the operation time of the system was reduced due to shorter heat transfer periods. Consequently, it resulted in obtaining desired temperature faster.