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Intensification of nanofluid thermal performance with install of turbulator in a LFR system
Chemical Engineering and Processing: Process Intensification ( IF 3.8 ) Pub Date : 2021-02-05 , DOI: 10.1016/j.cep.2021.108322
Z. Ebrahimpour , M. Sheikholeslami

In current suggested design for domestic usage, arrangements of mirrors have been implemented as primary reflector. Impose of trapezoidal tank intensifies the optical performance and alumina-water has been utilized as operating fluid which is practical due to kind of application. For modeling, finite volume approach was imposed and extracted heat flux from solving the pure radiation were added as source term of turbulent modeling of nanomaterial flow. Twisted tapes (TT) were installed within the pipe to augment the convective flow. Inlet temperature (Tin), flow rate (V), twist (TR) and width (WR) ratios are variables for various cases. Irreversibility and thermal behavior were reported for all cases. With existence of cavity, the optical efficiency enhances up to 73.5 %. For lowest values of other parameter, augmenting TR and WR cause friction faction to increase about 27.09 % and 9.22 % but increasing V leads to decline of f about 29.77 %. With assumption of lowest values of other variables, augmentation of TR, V and WR leads to intensification of Nu about 4.83 %, 146.4 % and 1.69 %. As Tin intensifies, ηth declines about 23.7 % when V = 6.3, WR = 0.56, TR = 2.With enhance of TR and WR, ηth goes up about 0.11 % and 0.037 % with considering lowest values of other variables.



中文翻译:

在LFR系统中安装湍流器可增强纳米流体的热性能

在当前建议的家用设计中,已将镜子的布置作为主要的反射器。梯形槽的施加增强了光学性能,并且由于应用种类的原因,氧化铝水已经被用作工作流体。为了进行建模,采用了有限体积方法,并添加了从求解纯辐射中提取的热通量作为纳米材料流的湍流建模的源项。在管道内安装了扭曲带(TT),以增加对流。入口温度(T in),流量(V),扭曲(TR)和宽度(WR)的比例是各种情况下的变量。报告了所有情况下的不可逆性和热行为。由于存在空腔,光学效率提高了73.5%。对于其他参数的最小值,增大TR和WR会导致摩擦系数增加约27.09%和9.22%,但增大V导致f下降约29.77%。假设其他变量的最小值,TR的增加,VWR导致Nu增强约4.83%,146.4%和1.69%。随着T增加,ηŤH 下跌约23.7% V = 6.3,WR = 0.56,TR = 2随着TR和WR的增加, ηŤH 考虑到其他变量的最小值,则上升约0.11%和0.037%。

更新日期:2021-02-10
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