Thermophysical properties, heat transfer and pressure drop of COOH-functionalized multi walled carbon nanotubes/water nanofluids
作者： Mohammad Hemmat Esfe , Seyfolah Saedodin , Omid Mahian , Somchai Wongwises , None
DOI: 10.1016/J.ICHEATMASSTRANSFER.2014.08.037
关键词:
摘要: Abstract This paper is a continuation of the authors' previous work on thermophysical properties, heat transfer, and pressure drop nanofluids [Experimental Thermal Fluid Science 52 (2014) 68–78]. In this paper, an experimental study carried out to turbulent flow COOH-functionalized multi-walled carbon nanotubes/water nanofluid flowing through double tube exchanger. For purpose, first, properties nanofluid, including thermal conductivity dynamic viscosity, have been measured at various temperatures concentrations. Using data, new correlations as function temperature concentration are presented predict properties. next step, effects low volume fractions (from 0.05% 1%) transfer rate studied Reynolds numbers between 5000 27,000. The results reveal that with increasing concentration, coefficient performance factor increase. On average, 78% increase in coefficient, 36.5% average Nusselt number, 27.3% penalty recorded for highest MWCNTs water.
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