A Review on Experimental Investigation of Heat Transfer Rate by using Alumina Oxide Nano Fluid in Radiator

2019 ◽  
Vol 7 (10) ◽  
pp. 646-648
Author(s):  
Nishant Sakhare
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Nano Fluid ◽  
Alumina Oxide

Heat Transfer in Film Boiling With Pulsating Pressures

1964 ◽  
Vol 86 (3) ◽  
pp. 457-460 ◽  
Author(s):  
D. A. Di Cicco ◽  
R. J. Schoenhals
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Transfer Rate ◽  
High Purity ◽  
Atmospheric Pressure ◽  
Transfer Rate ◽  
Peak Pressure ◽  
Film Boiling ◽  
Periodic Pressure ◽  
Initial Results

The purpose of this exploratory experimental investigation was to determine the effect on the heat-transfer rate when a pulsating pressure is applied to a stable film boiling system. The test section used consisted of a 0.030-in-dia horizontal platinum wire. The boiling medium was monofluorotrichloromethane, C Cl3F, commercially available in high purity as Refrigerant 11. A boiling curve was obtained at atmospheric pressure. In addition, pulsating tests were conducted for various pulsing rates and for three different test wire temperatures. Periodic pressure pulses of approximately 100 psi were applied to the system. The initial results thus far obtained in this investigation show a substantial increase in the heat-transfer rate for pulsing frequencies ranging from 11.3 cps to 25.8 cps. The improvement is noted to be from 59.5 percent to 103 percent above the heat-transfer rate for film boiling at atmospheric pressure at the same temperature difference between the test wire and the fluid. It was also found that the heat-transfer rate achieved was higher than the average of the heat-transfer rate for atmospheric pressure film boiling and that for subcooled film boiling at the peak pressure achieved in pulsing. For the higher pulsing frequencies, the heat-transfer rate was found to be even greater than that for subcooled film boiling at the peak pressure.

scholarly journals Numerical Investigation of Heat Transfer Rate in Helically Coiled Pipe Using Al2O3/Water Nanofluid

2020 ◽  
Vol 13 (4) ◽  
pp. 27-36
Author(s):  
Ahmed F. Hasan
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Pure Water ◽  
Outer Wall ◽  
Reynolds Numbers ◽  
Nano Fluid ◽  
High Reynolds ◽  
Better Than

Nanofluid materials play an important role in the industry nowadays, which has drawn the attention of researchers to enhance the characteristics of the heat transfer of the fluids in the coiled shape heat exchangers. The effect of using Al2O3/water Nano fluid on the characteristic of the heat transfer rate inside the helically coiled pipe was numerically studied at different Reynolds numbers. Moreover, fluid flow analyses were investigated numerically in terms of pressure and velocity profile. The heat transfer enhancement using this Nano fluid has been studied and then compared to pure water at Reynolds number values of 200, 600, and 1500 respectively. The results showed that a reduction in the temperature of the outer wall pipe when Al2O3/water Nano fluid was applied particularly at a low Reynolds number compared to pure water. Generally speaking, it has been seen that the reduction in the temperature profile is much better than the high Reynolds number.

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