2D numerical analysis of energy harvesting in oscillating heat pipe using piezoelectric transducers

2017 ◽  
Author(s):  
Sajiree Vaidya ◽  
Oliver Myers ◽  
Scott Thompson ◽  
Nima Shamsaei ◽  
John G. Monroe
Keyword(s):  
Numerical Analysis ◽  
Energy Harvesting ◽  
Heat Pipe ◽  
Piezoelectric Transducers ◽  
Oscillating Heat Pipe

Energy harvesting via fluidic agitation of a magnet within an oscillating heat pipe

2018 ◽  
Vol 129 ◽  
pp. 884-892 ◽  
Author(s):  
J. Gabriel Monroe ◽  
Omar T. Ibrahim ◽  
Scott M. Thompson ◽  
Nima Shamsaei
Keyword(s):  
Energy Harvesting ◽  
Heat Pipe ◽  
Oscillating Heat Pipe

Harvesting Thermal Energy via Tube-based Triboelectric Nanogenerators within an Oscillating Heat Pipe

2022 ◽  
Author(s):  
Chao Chang ◽  
Xiaoyu He ◽  
Zhaoyang Han ◽  
Lilin Pei ◽  
Zongyu Wang ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Energy Harvesting ◽  
Heat Pipe ◽  
Thermal Energy ◽  
Energy Crisis ◽  
Human Society ◽  
The Sustainable Development ◽  
Oscillating Heat Pipe ◽  
Triboelectric Nanogenerators ◽  
Conversion Technology

Developing energy harvesting and conversion technology is of great significance to mitigate the energy crisis and realize the sustainable development of human society. In this work, we designed and fabricated...

scholarly journals Numerical Analysis on Temperature Field of Grinding Ti-6Al-4V Titanium Alloy by Oscillating Heat Pipe Grinding Wheel

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 670 ◽  
Author(s):  
Ning Qian ◽  
Zhengcai Zhao ◽  
Yucan Fu ◽  
Jiuhua Xu ◽  
Jiajia Chen
Keyword(s):  
Temperature Field ◽  
Numerical Analysis ◽  
Heat Pipe ◽  
Thermal Conduction ◽  
Three Dimensional ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Heat Accumulation ◽  
Conduction Model ◽  
Oscillating Heat Pipe

When grinding hard-to-machining materials such as titanium alloys, a massive grinding heat is generated and gathers in the grinding zone due to the low thermal conduction of the materials. The accumulated grinding heat easily leads to severe thermal damages to both the workpiece and the grinding wheel. A novel oscillating heat pipe (OHP) grinding wheel is one of the solutions to this phenomenon. The oscillating heat pipe grinding wheel can transfer the grinding heat directly from the grinding zone to avoid heat accumulation and a high temperature rise. In this paper, the temperature field of the grinding Ti-6Al-4V alloy is investigated, via the oscillating heat pipe grinding wheel, by numerical analysis. The three-dimensional thermal conduction model is built accordingly, containing the grinding wheel, grinding zone and Ti-6Al-4V workpiece. Due to the enhanced heat transport capacity of the oscillating heat pipe grinding wheel, the highest temperature in the grinding zone and the temperature on the ground surface of the workpiece decrease dramatically. For example, under a grinding heat flux of 1 × 107 W/m2, when using the grinding wheel without OHP and with OHPs, the highest temperature in the grinding zone drops from 917 °C to 285 °C by 68.7%, and the ground surface temperature decreases from 823 °C to 244 °C by 71.2%. Moreover, the temperature distribution on the grinding wheel is more uniform with an increase of the number of oscillating heat pipes.

On the energy harvesting and heat transfer ability of a ferro-nanofluid oscillating heat pipe

2019 ◽  
Vol 132 ◽  
pp. 162-171 ◽  
Author(s):  
J. Gabriel Monroe ◽  
Swati Kumari ◽  
John D. Fairley ◽  
Keisha B. Walters ◽  
Matthew J. Berg ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Energy Harvesting ◽  
Heat Pipe ◽  
Oscillating Heat Pipe

Experimental and Numerical Simulation for Thermal Investigation of Oscillating Heat Pipe Using VOF Model

2020 ◽  
Vol 38 (1A) ◽  
pp. 88-104
Author(s):  
Anwar S. Barrak ◽  
Ahmed A. M. Saleh ◽  
Zainab H. Naji
Keyword(s):  
Thermal Resistance ◽  
Heat Pipe ◽  
Heat Input ◽  
Cfd Simulation ◽  
Working Fluid ◽  
Maximum Deviation ◽  
Inlet Temperature ◽  
Maximum Heat ◽  
Oscillating Heat Pipe ◽  
Vof Model

This study is investigated the thermal performance of seven turns of the oscillating heat pipe (OHP) by an experimental investigation and CFD simulation. The OHP is designed and made from a copper tube with an inner diameter 3.5 mm and thickness 0.6 mm and the condenser, evaporator, and adiabatic lengths are 300, 300, and 210 mm respectively.  Water is used as a working fluid with a filling ratio of 50% of the total volume. The evaporator part is heated by hot air (35, 40, 45, and 50) oC with various face velocity (0.5, 1, and 1.5) m/s. The condenser section is cold by air at temperature 15 oC. The CFD simulation is done by using the volume of fluid (VOF) method to model two-phase flow by conjugating a user-defined function code (UDF) to the FLUENT code. Results showed that the maximum heat input is 107.75 W while the minimum heat is 13.75 W at air inlet temperature 35 oC with air velocity 0.5m/s. The thermal resistance decreased with increasing of heat input. The results were recorded minimum thermal resistance 0.2312 oC/W at 107.75 W and maximum thermal resistance 1.036 oC/W at 13.75W. In addition, the effective thermal conductivity increased due to increasing heat input.  The numerical results showed a good agreement with experimental results with a maximum deviation of 15%.

scholarly journals Piezoelectric Energy Harvesting Solutions: A Review

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3512 ◽  
Author(s):  
Corina Covaci ◽  
Aurel Gontean
Keyword(s):  
Energy Harvesting ◽  
Piezoelectric Effect ◽  
Piezoelectric Transducers ◽  
Piezoelectric Energy Harvesting ◽  
Piezoelectric Energy ◽  
Direct Piezoelectric Effect ◽  
Harvesting Technique ◽  
Different Shapes ◽  
Piezoelectric Devices ◽  
Review Current

The goal of this paper is to review current methods of energy harvesting, while focusing on piezoelectric energy harvesting. The piezoelectric energy harvesting technique is based on the materials’ property of generating an electric field when a mechanical force is applied. This phenomenon is known as the direct piezoelectric effect. Piezoelectric transducers can be of different shapes and materials, making them suitable for a multitude of applications. To optimize the use of piezoelectric devices in applications, a model is needed to observe the behavior in the time and frequency domain. In addition to different aspects of piezoelectric modeling, this paper also presents several circuits used to maximize the energy harvested.

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