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Energy and entropy evaluation and two-phase simulation of nanoparticles within a solar unit with impose of new turbulator
Sustainable Energy Technologies and Assessments ( IF 8 ) Pub Date : 2020-05-19 , DOI: 10.1016/j.seta.2020.100727
M. Sheikholeslami , M. Jafaryar , Elham Abohamzeh , Ahmad Shafee , Houman Babazadeh

In current attempt, to augment the efficiency of unit, turbulators with different styles were scrutinized. For better describing the nanomaterial behavior, mixture model was employed and turbulent flow with use of k-ɛ model was examined. For verification purpose, comparison with experimental data was reported. With involve of holes, Sgen,th augments about 8.88% for lowest Re. Highest reduction of Sgen,th with rise of Re can be achieved for PBTT. Increment of pumping power leads to 3.17% decrement in temperature for TT case and highest changes occurs for PBTT. Maximum temperature of PBTT can be achieved in middle section. Involve of holes in BTT makes temperate grows about 0.46% in lowest Re. The concentration of nanomaterial is 0.05 in inlet and outlet while due to changes in velocity in test section the distribution of nanoparticles changes. For TT configuration, concentration reduces about 1.32% with augment of Re. Considering perforation in BTT case can augment the concentration about 5.33% when Re = 5000. BTT configuration has greatest velocity and its value is 1.62 times greater than that of TT for lowest Re. At middle cross section, highest velocity can be observed for BTT and PBTT while minimum values of velocity can be appeared for TT.



中文翻译:

采用新型湍流器的太阳能装置内纳米粒子的能量和熵评估以及两相模拟

在当前的尝试中,为了提高单元的效率,对具有不同样式的湍流器进行了审查。为了更好地描述纳米材料的行为,使用了混合模型,并使用k-ɛ模型检查了湍流。为了验证目的,报道了与实验数据的比较。带有孔的情况下,S gen,th可使最低Re升高约8.88%。S gen,th的最大降低PBTT可使Re升高。对于TT情况,泵浦功率的增加导致温度降低3.17%,而对于PBTT,变化最大。PBTT的最高温度可以在中间区域达到。BTT中空穴的参与使最低Re的温带增长约0.46%。纳米材料在入口和出口的浓度为0.05,而由于测试区域中速度的变化,纳米颗粒的分布也会发生变化。对于TT配置,随着Re的增加,浓度降低了约1.32%。当Re = 5000时,在BTT情况下考虑打孔可使浓度增加约5.33%。BTT构型具有最大速度,其值是最低Re的TT的1.62倍。在中间截面处,BTT和PBTT的速度最高,而TT的速度最低。

更新日期:2020-05-19
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