RT Journal Article
T1 Analysis of heat transfer characteristics of a GnP aqueous nanofluid through a double-tube heat exchanger
A1 Calviño Barreiro, Uxía
A1 Pérez Vallejo, Javier
A1 Buschmann, Matthias H.
A1 Fernández Seara, José
A1 Lugo Latas, Luis
K1 2213.02 Física de la Transmisión del Calor
K1 3328.16 Transferencia de Calor
K1 2204 Física de Fluidos
AB The thermal properties of graphene have proved to be exceptional and are partly maintained in its multi-layered form, graphene nanoplatelets (GnP). Since these carbon-based nanostructures are hydrophobic, functionalization is needed in order to assess their long-term stability in aqueous suspensions. In this study, the convective heat transfer performance of a polycarboxylate chemically modified GnP dispersion in water at 0.50 wt% is experimentally analyzed. After designing the nanofluid, dynamic viscosity, thermal conductivity, isobaric heat capacity and density are measured using rotational rheometry, the transient hot-wire technique, differential scanning calorimetry and vibrating U-tube methods, respectively, in a wide temperature range. The whole analysis of thermophysical and rheological properties is validated by two laboratories. Afterward, an experimental facility is used to evaluate the heat transfer performance in a turbulent regime. Convective heat transfer coefficients are obtained using the thermal resistances method, reaching enhancements for the nanofluid of up to 13%. The reported improvements are achieved without clear enhancements in the nanofluid thermal conductivity. Finally, dimensionless analyses are carried out by employing the Nusselt and Péclet numbers and Darcy friction factor.
PB Nanomaterials
SN 20794991
YR 2021
FD 2021-03-25
LK http://hdl.handle.net/11093/2059
UL http://hdl.handle.net/11093/2059
LA eng
NO Nanomaterials, 11(4): 844 (2021)
NO Ministerio de Economía y Competitividad | Ref. ENE2017-86425-C2-1-R
DS Investigo
RD 14-ene-2025