Advanced

Effects of graphene ethylene glycol/water nanofluids on the performance of a brazed plate heat exchanger

Wang, Zhe LU ; Wu, Zan LU and Sundén, Bengt LU (2018) In Journal of Nanofluids 7(6). p.1069-1074
Abstract

Effects of graphene ethylene glycol/water nanofluids as the hot side fluid on heat transfer and pressure drop characteristics in a brazed plate heat exchanger (BPHE) were experimentally investigated. Nanofluid properties, especially thermal conductivity and viscosity of the graphene nanofluids were measured at various graphene concentrations (0.01 to 1.0% wt.) and temperatures (10 to 60 °C). Dimensionless Nusselt number and friction factors were used to compare the performances of the BPHE with and without graphene addition. Experimental analysis showed that the heat transfer performance is improved by an increase in Reynolds number and flow velocity and with a decrease in nanofluid concentration. The graphene nanofluids at 0.01 to 0.1%... (More)

Effects of graphene ethylene glycol/water nanofluids as the hot side fluid on heat transfer and pressure drop characteristics in a brazed plate heat exchanger (BPHE) were experimentally investigated. Nanofluid properties, especially thermal conductivity and viscosity of the graphene nanofluids were measured at various graphene concentrations (0.01 to 1.0% wt.) and temperatures (10 to 60 °C). Dimensionless Nusselt number and friction factors were used to compare the performances of the BPHE with and without graphene addition. Experimental analysis showed that the heat transfer performance is improved by an increase in Reynolds number and flow velocity and with a decrease in nanofluid concentration. The graphene nanofluids at 0.01 to 0.1% wt. brings an acceptable pressure drop penalty, but with a higher heat transfer performance than the base fluid in the BPHE. At a fixed flow velocity, the graphene nanofluids with proper concentrations give an increase about 4% to 7% in the heat transfer coefficients, which reveals that the graphene nanofluids can be a useful working medium in the BPHE. The increase in pressure drop is moderate under these experimental conditions which favours graphene nanofluids to be used in BPHEs for thermal systems.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Brazed plate heat exchanger, Ethylene glycol, Graphene nanofluids, Heat transfer enhancement, Pressure drop
in
Journal of Nanofluids
volume
7
issue
6
pages
6 pages
publisher
American Scientific Publishers
external identifiers
  • scopus:85047855040
ISSN
2169-432X
DOI
10.1166/jon.2018.1538
language
English
LU publication?
yes
id
db5064ba-ec88-4e08-990a-3aabb248c0c8
date added to LUP
2018-06-11 09:22:30
date last changed
2018-06-11 09:22:30
@article{db5064ba-ec88-4e08-990a-3aabb248c0c8,
  abstract     = {<p>Effects of graphene ethylene glycol/water nanofluids as the hot side fluid on heat transfer and pressure drop characteristics in a brazed plate heat exchanger (BPHE) were experimentally investigated. Nanofluid properties, especially thermal conductivity and viscosity of the graphene nanofluids were measured at various graphene concentrations (0.01 to 1.0% wt.) and temperatures (10 to 60 °C). Dimensionless Nusselt number and friction factors were used to compare the performances of the BPHE with and without graphene addition. Experimental analysis showed that the heat transfer performance is improved by an increase in Reynolds number and flow velocity and with a decrease in nanofluid concentration. The graphene nanofluids at 0.01 to 0.1% wt. brings an acceptable pressure drop penalty, but with a higher heat transfer performance than the base fluid in the BPHE. At a fixed flow velocity, the graphene nanofluids with proper concentrations give an increase about 4% to 7% in the heat transfer coefficients, which reveals that the graphene nanofluids can be a useful working medium in the BPHE. The increase in pressure drop is moderate under these experimental conditions which favours graphene nanofluids to be used in BPHEs for thermal systems.</p>},
  author       = {Wang, Zhe and Wu, Zan and Sundén, Bengt},
  issn         = {2169-432X},
  keyword      = {Brazed plate heat exchanger,Ethylene glycol,Graphene nanofluids,Heat transfer enhancement,Pressure drop},
  language     = {eng},
  month        = {12},
  number       = {6},
  pages        = {1069--1074},
  publisher    = {American Scientific Publishers},
  series       = {Journal of Nanofluids},
  title        = {Effects of graphene ethylene glycol/water nanofluids on the performance of a brazed plate heat exchanger},
  url          = {http://dx.doi.org/10.1166/jon.2018.1538},
  volume       = {7},
  year         = {2018},
}