MEMS tackle HVAC/automatic-transmission markets
September 03, 2010 // R. Colin Johnson
MEMS startup Microstaq Inc. is pioneering promising new markets, using its micro-valve as a pilot to control the large flows necessary to tackle the lucrative heating, ventilation and air-conditioning (HVAC) markets—valued at over $60 billion worldwide by market research firm The Freedonia Group—with MEMS-control of automotive transmissions on the horizon.
MEMS microfluidic devices, such as the micro-pumps being designed by Debiotech S.A. (Lausanne, Switzerland) and the micro-valves being hawked by MultusMEMS AB (Uppsala, Sweden) can control micro-liters of fluid- and gas-flows, making them suitable for emerging applications such as medical labs-on-a-chip. Microstaq (Austin, Texas), on the other hand, uses its MEMS micro-valve technology to control conventional flow applications including HVAC and automatic transmissions on cars.
Microstaq previously announced a collaboration with Freescale Semiconductor Inc. on its intelligent refrigerant control system that employs Freescale's MEMS pressure sensors and microcontrollers—called Freescale's superheat control module—which now also works with Microstaq's novel MEMS silicon micro-valve.
The Microstaq's micro-valve is fabricated using the same silicon processing steps as an ordinary chip--layers of patterned silicon—but with micron-sized channels through which the fluid or gas flows. By using the precision MEMS valve as a pilot for controlling conventional valves, even high-flow applications can be micro-managed by MEMS, according to MicroStaq.
"Our micro-valve is fabricated from three layers of silicon, the central layer of which is a mechanical element that moves through electrically controlled thermal expansion to open and close a microfluidic port," said Nelson Fuller, vice president of research. "But we can couple that MEMS valve with a conventional spool valve—allowing a micro-valve measuring just 10-by-5-by-3 millimeters to control a conventional spool valve that can handle flows into the hundreds of liters a minute."
For the last two years, Microstaq has been advising potential customers that switching to its micro-valves can increase the efficiency of existing HVAC systems by as much as 25 percent, making the technology good for retrofits. Now Microstaq has started landing contracts to retrofit MEMS valves into commercial refrigeration systems, starting with grocery store chains.
Besides HVAC and refrigeration applications, Microstaq is also pioneering the use of MEMS micro-valves for transmissions in automotive applications. MEMS valves take up three times less space than the solenoid valves used today, enabling smaller, lighter, and less expensive automatic transmissions to be built, according to Microstaq, which is currently courting automobile transmission makers worldwide.
Extensible CPU cores exploit IoT's vast potential
May 22, 2015
Cisco Systems has predicted that by 2020, there will be 50 billion “things” connected to the Internet up from 15 billion ...
Audi connects to Baidu, Huawei at CES Asia
New class of magnets attract energy harvesting attention
Sony raises image sensor capex...again
OneSpin Solutions takes formal verification to the App store
Why the speculations on Nokia’s map service HERE run hot
May 21, 2015
Nokia’s digital map service HERE is on the block – and a crowd of suitors are outbidding each other. But some remain at the ...
Flexible OLED display peels off the wall
Irish battery R&D facility targets advanced material development
Bosch adjusts course for future mobility requirements
- Integrating GPS into consumer products
- Controlling LED Lighting Using Triacs and Quadracs
- Automotive Designs Demand Low EMI Synchronous Buck Converters
- Smart Capacitive Design Tips
InterviewCEO interview: What's next after Tower's turn-around?
May 2015 marks the tenth anniversary of Russell Ellwanger taking over as CEO of speciality foundry Tower Semiconductor Ltd. (Migdael Haemek, Israel), which now trades as TowerJazz. And so EE Times Europe ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
In this month's reader offer, Analog Devices is giving away five Blackfin Low-Power Imaging Platform (BLIP) Development Systems (ADZS-BF707-BLIP2), worth 199 dollars each, for EETimes Europe's readers to win.
Targeting demanding ultra-low-power, real-time applications for image sensing and advanced audio, the development platform leverages the company’s ADSP-BF707BBCZ-4 Blackfin processor as...MORE INFO AND LAST MONTH' WINNERS...
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.