Volume 12, Issue 1 (4-2022)                   JEM 2022, 12(1): 130-143 | Back to browse issues page

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Aghaei A, Dezfulizadeh A, Fadaei dehar A, Sepehrirad M, Mazaheri H. Determination of Energy Efficiency and Exergy of Solar Collector Bed, Operating Plate under Turbulent Nanoscale Flow with Molybdenum Disulfide Nanoparticles in Different Morphologies for Tropical Regions of Iran. JEM. 2022; 12 (1) :130-143
URL: http://energy.kashanu.ac.ir/article-1-1458-en.html
Department of Mechanical Engineering, Arak Branch, Islamic Azad University, Arak, Iran
Abstract:   (1053 Views)
This investigation evaluates the first and the second laws of thermodynamics for a flat plate sheet and tube-based solar collector, located in Abu-Musa Island (in Persian Gulf) in Hormozgan province in Iran, where a suspension of molybdenum disulfide (MoS2) nanoparticles with different shapes in water is the working fluid. The main aim of this study is to analyze morphology effects of MoS2 nanoparticles on heat transfer and entropy generation. To fulfill this demand, the analysis of four different nanoparticle shapes (blades, platelets, bricks, and cylinders) is chosen. The results of Nusselt number, outlet fluid temperature, pressure drop, friction factor, performance evaluation criterion (PEC), and entropy generation are calculated and reported not only for different shapes of nanoparticles but also for nanoparticles volume fractions up to 4%, in turbulent flow with two different mass flow rates of 0.50 and 0.75 kg/s. According to the obtained results, the PEC of model with ϕ=3% and bricks nanoparticle shape in ṁ=0.5 kg/s is found to be the best among all models, and its value is around 1.269. However, in case with ṁ=0.75 kg/s this value for nanofluid with ϕ=4% and bricks nanoparticle shape is found to be the best among all models and is about 1.182. It was also found that for mass flow rate of 0.50 kg/s, adding bricks and blade shaped nanoparticles to base fluid is not advantageous from the second law viewpoint. Nevertheless, for mass flow rate of 0.75 kg/s it was seen that using volume fractions of 1% and 4% of bricks and blade can reduce the entropy generation rate in comparison with base fluid up to 8%.
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Type of Study: Research | Subject: Mechanical Engineering
Received: 2020/04/26 | Revised: 2022/06/15 | Accepted: 2021/02/23 | Published: 2022/03/1

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