Design and Fabrication of the Heat Pipe Generator MDEATED 2012, PATTAYA, THAILAND Design and Fabrication of the Heat Pipe Generator C.F. SHEN Graduate Institute of Mechatronic System Engineering National University of Tainan , Taiwan, R.O.C Hello everybody, hello professor, I come from National University of Tainan. My name is Shen Cheng Feng. I would introduce my topic is design and fabrication of the heat pipe generator.

Outline Introduction Purpose Experiment Results and Discussions Conclusion This is my outline. First is the introduction, second is purpose, and next is experiment, and last is conclusion.

Introduction In 1999, the steam momentum resulted in the mechanical energy is used first with the turbine and transfers to electricity in the heat pipe. The patent related to one kinds of the heat pipe generator with turbine is registered in 2008 . The most important issue is to find the potential energy. The design of the energy harvester is a new and interesting topic. In 1999 first propose the use of the steam momentum resulted in the mechanical energy is used first with the turbine and transfers to electricity in the heat pipe. And then in 2008 the patent related to one kinds of the heat pipe generator with turbine is registered. There is no doubt about the electricity generated by the turbine, but it needs many complex processes to build this heat pipe generator. A. Akbarzadeh , et al,1999 U.S Patent, T. NGUYEN, et al. 2008

+ = Introduction What is heat pipe generator ? Heat Pipe Piezoelectric When mechanical energy is applied to piezoelectric materials, positive and negative charges move to opposite ends of the material and generate the electric current. + = The heat pipe generator is combines with the heat pipe and piezoelectric generator. When mechanical energy is applied to piezoelectric materials, positive and negative charges move to opposite ends of the material and generate an electric charge. Heat Pipe Piezoelectric Harvester Heat Pipe Generator

Introduction What is heat pipe ? A heat pipe is a simple device that can quickly transfer heat from one point to another. They are often referred to as the "superconductors" of heat as they possess an extra ordinary heat capacity & heat transfer rate. A heat pipe is a simple device that can quickly transfer heat from one point to another. They are often referred to as the "superconductors" of heat as they possess an extra ordinary heat transfer capacity & rate with almost no heat loss. Heat pipe thermal cycle.

Introduction The utilization of the momentum resulted from the phase change within the heat pipe. When mechanical energy is applied to piezoelectric materials, and generate an electric current. Piezoelectric Water vapor Water The utilization of the momentum resulted from the phase change within the heat pipe. When mechanical energy is applied to piezoelectric materials, and generate an electric current. Heater Schematic diagram of the experimental apparatus.

Purpose The purpose of this paper focuses on the investigation of the relationship of the velocity of the vapor and the vibration-induced electricity. The purpose of this paper is on the investigation of the relationship between the velocity of the vapor and the experiment of the vibration-induced electricity.

Experiment The schematic diagram of the experimental system. Hot Wire Anemometer Digital Storage Oscilloscope Computer Schematic diagram of the experimental apparatus has two parts. The fixed piezoelectric and nozzle are with regard to generator part, and then the container and heater are with regard to heat pipe part. We will to use the digital oscilloscope is measured voltage, and the hot wire anemometer is measured velocity of the vapor, the data logger is record input heat and vapor temperature. The power supply is control by the input power. Data logger Power Supply The schematic diagram of the experimental system.

Experiment PVDF PVDF CASE1 CASE2 (mm) (mm) This slide describes the type of piezoelectric component. Two kind of cantilever type are used in the experiment. The length of the cantilever type is 60mm, and the thick is 0.2 mm. The PVDF material is used to combine with the copper cantilever beam. (mm) (mm) CASE1 CASE2 Schematic diagram of cantilever type in the experiment.

Results and Discussions From this fig, we can see the relationship between of the velocity of vapor and the heating power. Basically, the velocity of the vapor is increased with input power. The steam velocity profiles with the different heating power.

Results and Discussions CASE1 Heat source RMS 100W 237mV 90W 160mV 80W 130mV 70W 117mV 60W 94.5mV From this fig, we find that there is a great effect on the amplitude of input heat source, and the frequency is 60Hz. The resonant frequency of the output voltage in Case1. Photograph of Case1

Results and Discussions CASE2 Heat source RMS 100W 513mV 90W 451mV 80W 387mV 70W 331mV 60W 252mV It can be seen from the fig that the same phenomena are observed in case2, besides the greater amplitude is happen in case2. The resonant frequency of the output voltage in Case2. Photograph of Case2

Results and Discussions Heat source CASE2 60W 166% 70W 182% 80W 197% 90W 181% 100W 116% From this fig, we can see the root mean square value in Case 2 is higher than Case 1. The RMS of output voltage with different heating power in Case1 and Case2.

Conclusion The electric current driven by the steam is done and proved by this device. The relationship of steam velocity and piezoelectric current is well built in this study. Now that based on the above discussion and analysis of this study. The electric current driven by the steam is done and proved by this device. The relationship of steam velocity and piezoelectric current is well built in this study.

Thank you for your attention