Heat transfer, pressure drop and fouling studies of multi-walled carbon nanotube nano-fluids inside a plate heat exchanger
作者： M.M. Sarafraz , F. Hormozi
DOI: 10.1016/J.EXPTHERMFLUSCI.2015.11.004
关键词: Heat transfer 、 Plate heat exchanger 、 Flow coefficient 、 Nanofluid 、 Thermodynamics 、 Pressure drop 、 Heat transfer coefficient 、 Composite material 、 Concentric tube heat exchanger 、 Dynamic scraped surface heat exchanger
摘要: Abstract This work presents the results of an experimental research on heat transfer and pressure drop characteristics multi-walled carbon nanotube (MWCNT), aqueous nano-fluids inside a plate exchanger (PHE), with consideration fouling formation nanotubes (CNTs). Influence operating parameters such as flow rate (700 Re T in = 50–70 °C) overall coefficient was experimentally investigated. Results demonstrated that could be intensified, when concentration nano-particles increase. In addition, increase temperature inlet can cause slight coefficient. terms drop, it seen increasing mass nano-fluids, intensified for rate, enhancement significant, while concentration, small penalty registered. Although MWCNT/water presented higher friction factor comparison base fluid, they provided better thermal performance fluid. For long-operating condition, significant resistance also measured, which amplified by volumetric nano-fluids. A none-linear behavior over extended time registered decrease well.
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