Effect of Ultralow Concentrated Reduced Graphene Oxide Nanofluid on Radiator PerformanceSource: Journal of Heat Transfer:;2021:;volume( 143 ):;issue: 008::page 082501-1DOI: 10.1115/1.4051233Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Nanocoolants are engineered colloidal suspensions of nanoparticles in a conventional coolant (water–ethylene glycol). Use of metals and metallic oxide nanofluids at concentrations greater than 0.01 vol % has been studied in greater detail compared to functionalized graphene nanofluids. In the present work, an experimental investigation is carried out on an automobile radiator by changing the conventional coolant to reduced graphene oxide (RGO) nanocoolant. The present study focuses on the effect of ultralow nanoparticle concentration (0.002–0.006 vol %), Reynolds number of hot coolant (80–170), Reynolds number of air (210–270), and inlet temperature of hot coolant (40 °C and 60 °C). The effect of these parameters on the performance of the radiator is measured in terms of convective heat transfer coefficient (CHTC), Nusselt number, friction factor, and effectiveness. Results indicate that at 0.006 vol % concentration, there is a maximum increase of 100.5% and 111%, respectively, in CHTC and effectiveness, besides a reduction in friction factor. RGO nanocoolant offers great scope for reducing the radiator size and increasing its performance.
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| contributor author | Ponangi, Babu Rao | |
| contributor author | Krishna, V. | |
| contributor author | Seetharamu, K. N. | |
| date accessioned | 2022-02-06T05:34:02Z | |
| date available | 2022-02-06T05:34:02Z | |
| date copyright | 6/28/2021 12:00:00 AM | |
| date issued | 2021 | |
| identifier issn | 0022-1481 | |
| identifier other | ht_143_08_082501.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4278298 | |
| description abstract | Nanocoolants are engineered colloidal suspensions of nanoparticles in a conventional coolant (water–ethylene glycol). Use of metals and metallic oxide nanofluids at concentrations greater than 0.01 vol % has been studied in greater detail compared to functionalized graphene nanofluids. In the present work, an experimental investigation is carried out on an automobile radiator by changing the conventional coolant to reduced graphene oxide (RGO) nanocoolant. The present study focuses on the effect of ultralow nanoparticle concentration (0.002–0.006 vol %), Reynolds number of hot coolant (80–170), Reynolds number of air (210–270), and inlet temperature of hot coolant (40 °C and 60 °C). The effect of these parameters on the performance of the radiator is measured in terms of convective heat transfer coefficient (CHTC), Nusselt number, friction factor, and effectiveness. Results indicate that at 0.006 vol % concentration, there is a maximum increase of 100.5% and 111%, respectively, in CHTC and effectiveness, besides a reduction in friction factor. RGO nanocoolant offers great scope for reducing the radiator size and increasing its performance. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Effect of Ultralow Concentrated Reduced Graphene Oxide Nanofluid on Radiator Performance | |
| type | Journal Paper | |
| journal volume | 143 | |
| journal issue | 8 | |
| journal title | Journal of Heat Transfer | |
| identifier doi | 10.1115/1.4051233 | |
| journal fristpage | 082501-1 | |
| journal lastpage | 082501-10 | |
| page | 10 | |
| tree | Journal of Heat Transfer:;2021:;volume( 143 ):;issue: 008 | |
| contenttype | Fulltext |