A numerical study of water based nanofluids in shell and tube heat exchanger

Q2 Engineering Energy Harvesting and Systems Pub Date : 2023-03-17 DOI:10.1515/ehs-2022-0155

R. Gugulothu, N. Sanke, Naga Sarada Somanchi, Vikas Normalla, F. Akter, B. Sunil

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引用次数: 3

Abstract

Abstract This numerical investigation is made to estimate the effect of Al2O3 and Cu nanofluids on heat transfer rate, friction factor and thermal performance factor of a shell and tube heat exchanger. Mass flow rates of shell side (water) fluid are varied. Water based nanofluids are used inside the tubes with 0.01, 0.03, and 0.05% volume concentrations of Al2O3 and Cu nanofluids. Nusselt number obtained from the present investigation is compared with Dittus–Bolter equation and Pongjet Pomvonge et al. and found to be in good agreement with a maximum deviation of 3%. The Nusselt number of the dispersed nanofluids increased with the increase of nanofluids volume concentrations and shell side mass flow rate. In this study, maximum enhancement in Nusselt number is 7.50%, 8.65%, and 9.61% for Al2O3, and 1.46%, 2.23%, and 3.18% for Cu nanofluid respectively at 0.01, 0.03, and 0.05% volume concentrations were compared to base fluid as water. Friction factor is highest by 58.00% at 0.05% volume concentration of Cu/H2O nanofluid when relate to Al2O3/H2O nanofluid. Thermal Enhancement factor achieved is highest for Al2O3/H2O nanofluid.

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水基纳米流体在管壳式换热器中的数值研究

摘要本文通过数值模拟研究了Al2O3和Cu纳米流体对管壳式换热器换热速率、摩擦因数和热性能因数的影响。壳侧(水)流体的质量流速是变化的。在管内使用水基纳米流体，体积浓度分别为0.01、0.03和0.05%的Al2O3和Cu纳米流体。将本研究得到的Nusselt数与Dittus-Bolter方程和Pongjet Pomvonge等进行了比较，发现两者吻合良好，最大偏差为3%。分散纳米流体的努塞尔数随纳米流体体积浓度和壳侧质量流量的增加而增加。在本研究中，当体积浓度为0.01、0.03和0.05%时，Al2O3纳米流体的Nusselt数的最大增强值分别为7.50%、8.65%和9.61%，Cu纳米流体的Nusselt数的最大增强值分别为1.46%、2.23%和3.18%。当Cu/H2O纳米流体体积浓度为0.05%时，Al2O3/H2O纳米流体的摩擦因数最高，达到58.00%。Al2O3/H2O纳米流体的热增强系数最高。

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来源期刊

Energy Harvesting and Systems Energy-Energy Engineering and Power Technology

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2.00

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