Analysis of Heat Transfer Characteristics of a GnP Aqueous Nanofluid through a Double-Tube Heat Exchanger
| dc.contributor.author | Calviño, Uxía | |
| dc.contributor.author | Vallejo, Javier P. | |
| dc.contributor.author | Buschmann, Matthias H. | |
| dc.contributor.author | Fernández-Seara, José | |
| dc.contributor.author | Lugo, Luis | |
| dc.date.accessioned | 2023-05-30T09:30:00Z | |
| dc.date.available | 2023-05-30T09:30:00Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | 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. | |
| dc.identifier.citation | https://doi.org/10.3390/nano11040844 | |
| dc.identifier.uri | http://calderon.cud.uvigo.es/handle/123456789/23 | |
| dc.language.iso | en | |
| dc.publisher | Nanomaterials 2021, 11(4), 844 | |
| dc.title | Analysis of Heat Transfer Characteristics of a GnP Aqueous Nanofluid through a Double-Tube Heat Exchanger | |
| dc.type | Article |