Application of nanofluids in a shell-and-tube heat exchanger

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Innovations in the field of nanotechnology have potential to improve industrial productivity and performance. One promising applications of this emerging technology is using nanofluids with enhanced thermal properties. Nanofluids, engineered colloidal suspensions consisting of nano-sized particles (less than 100nm) dispersed in a basefluid, have shown potential as industrial cooling fluids due to the enhanced heat transfer characteristics. Experiments are conducted to compare the overall heat transfer coefficient and pressure drop of water vs. nanofluids in a laboratory scale industrial type shell and tube heat exchanger. Three mass particle concentrations, 2%, 4% and 6%, of SiO 2-water nanofluids are formulated by dispersing 20 nm diameter nano particles in desalinated water. Nanofluid and tap water are then circulated in the cold and hot loops, respectively, of the heat exchanger to avoid direct particle deposition on heater surfaces. Interestingly, experimental result show both augmentation and deterioration of heat transfer coefficient for nanofluids depending on the flow rate through the heat exchangers. This trend is consistent with an earlier reported observation for heat transfer in micro channels. This trend may be explained by the counter effect of the changes in thermo-physical properties of fluids together with the fouling on the heat exchanger surfaces. The measured pressure drop in the nanofluids flow shows an increase when compared to that of basefluid that could limit the use of nanofluids in heat exchangers for industrial application.

Original languageEnglish
Title of host publicationASME 2013 11th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM 2013
DOIs
Publication statusPublished - 1 Dec 2013
EventASME 2013 11th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM 2013 - Sapporo, Japan
Duration: 16 Jun 201319 Jun 2013

Publication series

NameASME 2013 11th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM 2013

Other

OtherASME 2013 11th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM 2013
CountryJapan
CitySapporo
Period16/6/1319/6/13

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ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Process Chemistry and Technology
  • Modelling and Simulation

Cite this

Cox, J., Kanjirakat, A., & Sadr, R. (2013). Application of nanofluids in a shell-and-tube heat exchanger. In ASME 2013 11th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM 2013 [V001T02A003] (ASME 2013 11th International Conference on Nanochannels, Microchannels and Minichannels, ICNMM 2013). https://doi.org/10.1115/ICNMM2013-73104