Re: Piezoelectric material and kites
- piezoelectric nanogenerator http://fand.kaist.ac.kr/Attach/NCG.pdfFlexible Nanocomposite Generator Made of BaTiO 3Nanoparticles and Graphitic CarbonsKwi-Il Park , Minbaek Lee , Ying Liu , San Moon , Geon-Tae Hwang , Guang Zhu ,Ji Eun Kim , Sang Ouk Kim , Do Kyung Kim , Zhong Lin Wang , and Keon Jae Lee *Where in AWES will such find homes?
- I think that kites excel at producing gross movement, so this is not applicable directly. However, if they can get it to respond to heat, like the Brownian motion, it might put us all out of business by circumventing the Second Law.Bob StuartOn 22-May-12, at 11:11 AM, Joe Faust wrote:
- AWES homes?Brainstorming:
- Flex of wing coverings
- Flex of lines in the reeling process and phases
- Clothing of AWES workers
- Flutter sensors
- Flagging AWES with the flexing
- Flutter AWES where the system thrives on chaotic wakes
- It might be a good flutter sensor, although a microphone would probably be sufficient. If it is dirt cheap and feather-light, it might generate useful power by fluttering, but then we are back to the conductive tether debate.Bob StuartOn 22-May-12, at 11:35 AM, Joe Faust wrote:
- I'm off all that is written about the piezo, but I still come to the conclusion that they have a great chance.
A breakthrough in the industry often been driven by the advent of new materials. I think that airbornes are not an exception. I assume that there will be a net material, which is partly to allow air through itself, will generate electricity. Transmission of electricity to the ground is likely to be a single wire as the waveguide. The last decades of the entire scientific and industrial revolution happening in microcosm. May be we have to focus on these technologies? Dreaming of a small'll never get a great result.
- Also some investigations of piezo fabric from Elias Siores
- Alex,When we last looked at piezo, the challenge seemed to be how to maximally drive the bimorphs at very high frequencies in ordinary wind, for maximum power-to-weight and lowest installed-unit-energy cost. Piezo may be promising in very high wind, like the tropopause jet streams. Modern thin-film manufacturing can solve the array "intricacy" problem, but it willlikely take a big investment to finally get to cheap power.A single wire as a wave guide is also a good idea to fully explore. Coronal discharge will be the limiting factor, and the high-frequency power electronics available are still rather heavy.Sadly, piezo and microwave frequencies are far apart, so a cheap lightweight transformer stage is needed,daveS
- "As fossil energy resources deplete, wind energy gains ever more importance. Recently, piezoelectric energy harvestingmethods are emerging with the advancements in piezoelectric materials and its storage elements. Piezoelectric materials canbe utilized to convert kinetic energy to electrical energy. Utilization of piezoelectric wind harvesting is a rather new meansto convert renewable wind energy to electricity. Piezoelectric generators are typically low cost and easy to maintain. Thiswork illustrates an overview of piezoelectric wind harvesting technology"
- MFC :: Macro Fiber Compositehttp://tinyurl.com/MFCimages
- I had to read all 10 pages to get to the punchline at the end:
"the efficiencies are not sufficient the meet to requirements of minimum energy for devices, the desired electricity could be obtained with the advancements of piezoelectric materials and the storage elements."
Translation "current piezoelectric transducers are not efficient".
Translation to common parlance: "piezoelectric stuff sucks"
I would add that the methods cited to actuate the piezo elements resemble typical known missteps in wind energy, such as converting rotation (good) to reversing cycles (bad). That is a step backwards.
I have to say I never heard of soft piezoelectric elements which is interesting and possibly more promising than the hard ones since they allow more motion(?).
--- In AirborneWindEnergy@yahoogroups.com, "Muzhichkov" <muzhichkov@...> wrote:
> "As fossil energy resources deplete, wind energy gains ever more
> importance. Recently, piezoelectric energy harvesting methods are
> emerging with the advancements in piezoelectric materials and its
> storage elements. Piezoelectric materials can be utilized to convert
> kinetic energy to electrical energy. Utilization of piezoelectric wind
> harvesting is a rather new means to convert renewable wind energy to
> electricity. Piezoelectric generators are typically low cost and easy to
> maintain. This work illustrates an overview of piezoelectric wind
> harvesting technology"