Unsteady titanium alloy water-based nano fluid past an oscillatory moving vertical permeable semi-infinite flat plate with thermophoresis effect

2021 ◽  
Author(s):  
Wuriti Sridhar ◽  
Ganugapati Raghavendra Ganesh ◽  
K. S. Balamurugan ◽  
Gurram Dharmaiah
Keyword(s):  
Titanium Alloy ◽  
Flat Plate ◽  
Nano Fluid ◽  
Thermophoresis Effect ◽  
Water Based

scholarly journals Efficiency Improvement of a Photovoltaic Thermal (PVT) System Using Nanofluids

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3063 ◽  
Author(s):  
Joo Hee Lee ◽  
Seong Geon Hwang ◽  
Gwi Hyun Lee
Keyword(s):  
Flat Plate ◽  
Flow Rate ◽  
Thermal Efficiency ◽  
Measurement Errors ◽  
Efficiency Analysis ◽  
Working Fluid ◽  
Efficiency Improvement ◽  
Flow Rates ◽  
Electrical Efficiency ◽  
Water Based

Many studies and considerable international efforts have gone into reducing greenhouse gas emissions. This study was carried out to improve the efficiency of flat-plate photovoltaic thermal (PVT) systems, which use solar energy to produce heat and electricity simultaneously. An efficiency analysis was performed with various flow rates of water as the working fluid. The flow rate, which affects the performance of the PVT system, showed the highest efficiency at 3 L/min compared with 1, 2, and 4 L/min. Additionally, the effects of nanofluids (CuO/water, Al2O3/water) and water as working fluids on the efficiency of the PVT system were investigated. The results showed that the thermal and electrical efficiencies of the PVT system using CuO/water as a nanofluid were increased by 21.30% and 0.07% compared to the water-based system, respectively. However, the increase in electrical efficiency was not significant because this increase may be due to measurement errors. The PVT system using Al2O3/water as a nanofluid improved the thermal efficiency by 15.14%, but there was no difference in the electrical efficiency between water and Al2O3/water-based systems.

Study on Turning of Ti-6Al-4V with Water Steam as Coolant and Lubricant in Green Machining

2010 ◽  
Vol 426-427 ◽  
pp. 186-190 ◽  
Author(s):  
Yue Zhang ◽  
Rong Di Han ◽  
Yan Li Tang ◽  
Y. Wang
Keyword(s):  
Titanium Alloy ◽  
High Speed ◽  
Cutting Temperature ◽  
Small Diameter ◽  
Machined Surface ◽  
Surface Appearance ◽  
Water Steam ◽  
Water Based ◽  
Cutting Zone ◽  
Steam Cooling

To achieve green cutting of titanium alloy Ti-6Al-4V with water steam cooling and lubricating, a 600-800w minitype generator is developed. Compared to dry and water-based emulsion, the using of water steam decreases the main cutting force and the cutting temperature respectively; enhances the machined surface appearance. And it can help to chip forming and breaking. Water steam application also improves Ti-6Al-4V machinability and prolongs the tool life. The excellent cooling and lubricating action of water steam could be summarized that water molecule has polarity, small diameter and high speed, can be easily and rapidly to proceed adsorption in the cutting zone. The results indicate that the using of water steam has the potential to attain the green cutting of titanium alloy.

Study on Tool Wear of Cutting Ti-6Al-4V with Water Steam as Coolant and Lubricant in Green Machining

2010 ◽  
Vol 97-101 ◽  
pp. 2365-2368
Author(s):  
Yue Zhang ◽  
Rong Di Han ◽  
Tai Li Sun ◽  
Qi Dong Li ◽  
Xi Chuan Zhang
Keyword(s):  
Titanium Alloy ◽  
Tool Life ◽  
High Speed ◽  
Cutting Speed ◽  
Small Diameter ◽  
Water Steam ◽  
Green Machining ◽  
Water Based ◽  
Cutting Zone ◽  
Steam Cooling

To achieve green machining of titanium alloy Ti-6Al-4V with water steam cooling and lubricating, a 600-800w minitype generator is developed. Compared to dry and water-based emulsion, the using of water steam improves Ti-6Al-4V machinability and prolongs the tool life about 1 time and 0.5 times. And if the same tool life was selected, it would be easy to obtain that as water steam applied the cutting speed can increase about 15% and 10%. As a result, the productivity can be increased. The excellent cooling and lubricating action of water steam could be summarized that water molecule has a small diameter and high speed, can be easily and rapidly to penetrate the capillaries and proceed adsorption in the cutting zone. The results indicate that the using of water steam has the potential to attain the green machining of titanium alloy Ti-6Al-4V.

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