Mostafizur R M, Rasul M G, Nabi M N, Haque R, Jahirul M I
Fuel and Energy Research Group, School of Engineering and Technology, Central Queensland University, Rockhampton, QLD 4702, Australia.
Fuel and Energy Research Group, School of Engineering and Technology, Central Queensland University, Melbourne, VIC 3000, Australia.
Nanomaterials (Basel). 2023 Apr 9;13(8):1320. doi: 10.3390/nano13081320.
In this study, the performance of hybrid nanofluids in a flat plate solar collector was analysed based on various parameters such as entropy generation, exergy efficiency, heat transfer enhancement, pumping power, and pressure drop. Five different base fluids were used, including water, ethylene glycol, methanol, radiator coolant, and engine oil, to make five types of hybrids nanofluids containing suspended CuO and MWCNT nanoparticles. The nanofluids were evaluated at nanoparticle volume fractions ranging from 1% to 3% and flow rates of 1 to 3.5 L/min. The analytical results revealed that the CuO-MWCNT/water nanofluid performed the best in reducing entropy generation at both volume fractions and volume flow rate when compared to the other nanofluids studied. Although CuO-MWCNT/methanol showed better heat transfer coefficients than CuO-MWCNT/water, it generated more entropy and had lower exergy efficiency. The CuO-MWCNT/water nanofluid not only had higher exergy efficiency and thermal performance but also showed promising results in reducing entropy generation.
在本研究中，基于熵产生、火用效率、传热增强、泵功率和压降等各种参数，分析了平板太阳能集热器中混合纳米流体的性能。使用了五种不同的基液，包括水、乙二醇、甲醇、散热器冷却液和发动机油，以制备含有悬浮CuO和MWCNT纳米颗粒的五种混合纳米流体。在纳米颗粒体积分数为1%至3%和流速为1至3.5 L/min的条件下对纳米流体进行了评估。分析结果表明，与所研究的其他纳米流体相比，CuO-MWCNT/水纳米流体在体积分数和体积流量下降低熵产生方面表现最佳。尽管CuO-MWCNT/甲醇显示出比CuO-MWCNT/水更好的传热系数，但它产生了更多的熵且火用效率较低。CuO-MWCNT/水纳米流体不仅具有更高的火用效率和热性能，而且在减少熵产生方面也显示出有前景的结果。
