Heat Transfer Science for your Clothes Dryer

Although the allures of heat transfer science might be remote for some, and frankly boring for others, would you want to know more if they could dry your clothes with less energy? Michael Brown, not of GE or any drying machine manufacturer, has come up with a way to make clothes drying less energy intensive. Instead of using a traditional air-in-contact-with-heating-coils heater, Michael’s uses an oil as the heat-transfer medium. The oil needs less energy to heat, and, once heated, holds onto the heat better. That oil is then used to heat the air that gets blown into the drying drum.

The device is so much more efficient that it can be plugged into a regular 110 V plug (instead of 220s now required by dryers.) Additionally, the heating unit only ever reaches about 150 F, since the heat-transfer is so much more efficient. Traditional dryers have to heat their elements up to 1000 F in order to reach optimal efficiency, resulting in about 15,000 household fires each year.

The device can be installed by a technician in 30 minutes at a total cost of around $300, which would be recouped in less then four years. It might also be the first dryer to ever receive an Energy Star rating.

Crystals Absorb CO2 Like a Sponge

This is pretty neat!

The CBC is reporting that a new form of crystal can capture CO2 in a way that seems like magic.

Chemists at the University of California Los Angeles said the crystals — which go by the name zeolitic imidazolate frameworks, or ZIFs — can be tailored to absorb and trap specific molecules.

“The technical challenge of selectively removing carbon dioxide has been overcome,” said UCLA chemistry professor Omar Yaghi in a statement.
The team of scientists created 25 ZIF crystal structures in a laboratory, three of which showed a particular affinity for capturing carbon dioxide. The highly porous crystals also had what the researchers called “extraordinary capacity for storing CO2”: one litre of the crystals could store about 83 litres of CO2.

Beijing Closing Gas Stations

Beijing is admitting that it is a dirty place and is trying to clean itself up. Because they are hosting the olympics this year, they’re trying to improve their image. To reduce the amount of air pollution in the city officials are closing gas stations and retrofitting others. I have no idea why they didn’t do this earlier, but better late than never.

By the end of May, 144 will shut because they are not expected to meet higher environmental standards, according to state media.

The remainder are to be fitted with devices to reduce the level of fumes which escape when vehicles fill up.

Ovarian Cancer Testing Improved

The CBC is reporting that researchers at Yale have found a more effective way to detect ovarian cancer.

A new blood tests has been developed that Yale researchers say can detect ovarian cancer with 99 per cent accuracy.

The test uses six protein biomarkers to identify proteins in the bloodstream that signal an ovarian tumour is present in the body. The test is 99.4 per cent effective.

Previous tests for ovarian cancer only used four protein biomarkers and recognized only 15 to 20 per cent of new ovarian tumours.

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