How much power from MEMS windmills?
January 20, 2014 // Peter Clarke
A University of Texas Arlington research team has enjoyed considerable publicity for its development of a MEMS windmill that the developers have said could, when produced in array, provide energy for a mobile phone or be used for home energy generation.
But is that reasonable?
The one thing that is conspicuous by its
absence from any of the photographs or the Youtube video of the prototype MEMS
windmill, is any electrical wiring. Similarly conspicuous by its absence from
the UT Arlington website posting, is any discussion of how much electrical power
could be drawn from a millimeter-scale windmill.
In fact it is a general
consideration that the efficiency of conversion from wind to electrical power
increases the larger the system. Hence the desire to create wind turbines that
are hundreds of feet high. So how efficient would an array of thousands of
millimeter-scale windmills be? Would it be practical as a source of significant
amount of electrical energy?
Nonetheless Smitha Rao and J.-C. Chiao at UT
Arlington have designed and built a windmill that is about 1.8-mm at its widest
point using a recently formed foundry, WinMEMS Technologies Co. Ltd. (Guishan,
Taiwan). The blades are made from nickel alloy using planar multilayer
electroplating techniques.
"The problem most MEMS designers have is that
materials are too brittle,” Rao said, in a statement on the website. MEMS are
typically made from silicon. The micro windmills were tested in September 2013
and operate under "strong artificial winds" without any fracture in the material
because of the durable nickel alloy and smart aerodynamic design, according to
UT Arlington.
WinMEMS likes the idea and has struck an agreement with UT Arlington whereby the university gets to hold the intellectual property while WinMEMS is licensed to explore commercialization opportunities.
It is clear that MEMS windmills could be easy to make at the wafer scale and could be produced in very thin redundant structures.
Researcher Chiao said that flat panels with thousand of MEMS windmills could be mounted on the walls of buildings to harvest energy for lighting, security or environmental sensing and wireless communication.
There may be some issues about the most efficient MEMS structure and its orientation within a wall-mounted panel – where the wind passes over the surface rather than through it – but such a discussion can only be had in the context of how much electrical power can be drawn from the system.
Related links and articles:
News articles:
Ten analog, MEMS and sensor startups to watch in 2014
Startup offers chip-scale solar energy harvester
Singapore, Abu Dhabi, agree to develop MEMS together
All news- Business News
More funds for SiC-on-silicon power technology
February 03, 2014
Martin Lamb has been appointed as the Chairman of Coventry-based Anvil Semiconductors Ltd, to lead the company's commercialization ...
- Market News
Sales record ends chip industry's year
- Technology News
Design guide supports high speed COM Express signals
- Technology News
Samsung to reveal tablet with10-inch AMOLED at MWC 2014?
- Business News
Five lessons from Lenovo’s Motorola deal
- Feature Articles
3D IC ramp up: what can we learn from MEMS?
February 03, 2014
Under the motto “Application Ready”, this year’s 3D TSV Summit was very much focused on how to make 3D IC design an attractive ...
- Technology News
Researchers make magnetic monopoles
- Feature Articles
MediaTek goes wearable, Chinese and cheap
- Business News
Distributor MSC Technologies to operate as part of Avnet
Technical papers
- Understanding WLAN offload in cellular networks
- Software-Defined Radio Handbook
- High Efficiency, 150V 100mA Synchronous Step-Down Regulator
- Solutions for LTE-Advanced Manufacturing Test – Understanding the Requirements for LTE
Filter Wizard
Check out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.READER OFFER
Read more
To offer you a good start in 2014, Renesas Electronics Europe is giving away four demonstrations kits worth 325 Euros each, for EETimes Europe's readers to win.
Designed as an evaluation and demonstration tool for the company’s RX62N microcontrollers, the RX62N RSK (part number R0K5562N0S000BE) provides users with a powerful debug and demonstration platform targeted at common...
Read moreDesign centers
Automotive
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.
Follow us