Nanofluid potential in a rectangular natural circulation loop has been carried out through numerical investigation. A rectangular loop of dimension 110 cm length, 100 cm width in which 90 cm length of the heating and cooling sections is considered, respectively. The loop is filled with water-based CuO nanofluid with volumetric concentrations 1%, 2%, and 3%. Firstly, the validation of experimental results available in the literature is validated using the present numerical model. The potential of CuO nanofluids is utilized subjected to various inlet boundary conditions temperature and mass flow rate of cold and hot working fluids. The results show that CuO nanofluid can enhance the fluid flow and thermal performance of the loop. It is observed that heat transfer enhancement diminished with vol 3% because of dominating buoyancy forces. The study found that enhancement in heat transfer 5.33% and mass flow rate of 21.29% for CuO vol 2% nanofluid than water.

通过数值研究已经实现了矩形自然循环回路中的纳米流体电势。一个尺寸为110厘米长，100厘米宽的矩形环，其中分别考虑了90厘米长的加热和冷却部分。回路中填充了体积浓度分别为1％，2％和3％的水基CuO纳米流体。首先，使用当前数值模型对文献中可获得的实验结果进行验证。CuO纳米流体的潜力在各种入口边界条件温度和冷，热工作流体的质量流量的条件下均可利用。结果表明，CuO纳米流体可以增强回路的流体流动和热性能。观察到，由于主要的浮力，传热增强降低了3％。