Loading...
Search for:
sadeghinezhad--e
0.012 seconds
Evaluation of viscosity and thermal conductivity of graphene nanoplatelets nanofluids through a combined experimental–statistical approach using respond surface methodology method
, Article International Communications in Heat and Mass Transfer ; Volume 79 , 2016 , Pages 74-80 ; 07351933 (ISSN) ; Mehrali, M ; Sadeghinezhad, E ; Ang, B. C ; Ong, H. C ; Esmaeilzadeh, A ; Sharif University of Technology
Elsevier Ltd
Abstract
In the present study, three influential parameters including concentration, temperature and specific surface area of graphene nanosheets were investigated, which are the effective parameters on the viscosity and thermal conductivity of aqueous graphene nanosheets (GNP) nanofluids. A mathematical model developed by respond surface methodology (RSM) based on a central composite design (CCD). Also, the significance of the models was tested using the analysis of variance (ANOVA). The optimum results of aqueous GNP nanofluid showed that the concentration has a direct effect on the relative viscosity and thermal conductivity. Furthermore, predicted responses proposed by the Design Expert software...
Thermal performance enhancement of an evacuated tube solar collector using graphene nanoplatelets nanofluid
, Article Journal of Cleaner Production ; Volume 162 , 2017 , Pages 121-129 ; 09596526 (ISSN) ; Ong, H. C ; Ang, B. C ; Sadeghinezhad, E ; Esmaeilzadeh, A ; Mehrali, M ; Sharif University of Technology
Abstract
In this study, the effect of graphene nanoplatelets (GNP)/distilled water nanofluid on the thermal performance of evacuated tube solar collector (ETSC) water heater was experimentally investigated. The mass percentage of GNP was considered at 0.025, 0.5, 0.075 and 0.1 wt%. The physical and thermal properties of the GNP nanofluids including stability, specific heat capacity, viscosity and thermal conductivity were investigated. The thermal efficiency tests on the solar collector were carried out for varying volumetric flow rate of 0.5, 0.1, and 1.5 L/min while the ASHRAE standard 93–2003 was considered to calculate the efficiency of the collector. The results indicated that the solar...
Heat transfer and entropy generation analysis of hybrid graphene/Fe3O4 ferro-nanofluid flow under the influence of a magnetic field
, Article Powder Technology ; Volume 308 , 2017 , Pages 149-157 ; 00325910 (ISSN) ; Sadeghinezhad, E ; Akhiani, A. R ; Tahan Latibari, S ; Metselaar, H. S. C ; Kherbeet, A. S ; Mehrali, M ; Sharif University of Technology
Elsevier B.V
2017
Abstract
The heat transfer characteristics and entropy generation rate of hybrid graphene-magnetite nanofluids under forced laminar flow that subjected to the permanent magnetic fields were investigated. For this purpose, a nanoscale reduced graphene oxide-Fe3O4 hybrid was synthesized by using graphene oxide, iron salts and tannic acid as the reductant and stabilizer. The thermophysical and magnetic properties of the hybrid nanofluid have been widely characterized and thermal conductivity has shown an enhancement of 11%. The experimental results indicated that the heat transfer enhancement of hybrid magnetite nanofluid compared to the case of distilled was negligible when no magnetic field was...