Nanofluids as the circuit fluids of the geothermal borehole heat exchangers

被引：69

作者：

Daneshipour, Mahdi ^{[1
]}

Rafee, Roohollah ^{[1
]}

机构：

[1] Semnan Univ, Fac Mech Engn, POB 35131-19111, Semnan, Iran

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2017年 / 81卷

关键词：

Geothermal heat exchanger; CuO water; Al2O3; water; Nanofluid; Turbulent flow; Pumping power; Heat transfer rate; TRANSFER ENHANCEMENT; TURBULENT-FLOW; CONVECTION; VISCOSITY; MODEL;

D O I：

10.1016/j.icheatmasstransfer.2016.12.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Application of the CuO water and A1(2)O(3) water nanofluids as the working fluids of a geothermal borehole heat exchanger is investigated using numerical simulation. For this purpose, the Reynolds Averaged Navier-Stokes (RANS) equations with SST k-omega turbulence model are numerically solved to model the flow. Physical properties of the nanofluids are obtained using the available correlations. To show the validity of the simulations, the results for pure water are compared with available data in the literature. Results show that there is a specific diameter ratio at which the total water flow pressure loss in the heat exchanger is minimum. The results also show that the CuO-water nanofluid gives higher extracted heat than the alumina-water nanofluid but at the penalty of higher pressure losses and pumping powers. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：34 / 41

页数：8

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