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Prototype demonstrates success of advanced new energy technology
Date:6/10/2011

ajor advantage the ability to also produce electricity.

It's called a "thermally activated cooling system" that gains much of its efficiency by using extraordinarily small microchannels which help to better meet the performance, size and weight challenges. It effectively combines a vapor compression cycle with an "organic Rankine cycle," an existing energy conversion technology.

The new prototype completed at OSU succeeded in turning 80 percent of every kilowatt of waste heat into a kilowatt of cooling capability. Researchers say the conversion efficiency wouldn't be nearly as high if the goal is to produce electricity about 15-20 percent but it's still much better than the current approach, which is to waste the energy potential of all of the heat.

"This technology would be especially useful if there's a need to have cooling systems where heat is being wasted," Wang said. "That's one reason the research has been supported by the Department of Defense, because they see it being used to provide needed air conditioning for electronics and other purposes when they are using generators in the field."

However, the OSU scientists said that may be just the beginning. Factories often produce enormous amounts of wasted heat in their operations. The systems could also be incorporated into alternative energy technologies such as solar or geothermal, scientists say, in addition to fossil fuel use.

Conceptually, it should also be possible for such systems to be used in hybrid automotive technology, taking waste heat from the gasoline engine and using it not only for air conditioning but also to help recharge the battery that powers the vehicle, Wang said.

Continued research will be needed to perfect the technology and adapt it to different uses, the scientists said.

The work takes advantage of OSU's advanced programs in microchannel technology, a key focus of the Microproducts Breakthrough Institute operated by OS
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Contact: Hailei Wang
wanghai@engr.orst.edu
541-713-1354
Oregon State University
Source:Eurekalert

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