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Ultra-low-energy consumption ultrasonic clothes dryer

energy.gov

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Re: Ultra-low-energy consumption ultrasonic clothes dryer

#91

Post by nnain »

comicjk wrote: post #78
spodek wrote: post #7

It's not the fastest clothes dryer, but I often use one that runs on fusion in outer space.

Hanging clothes in direct sunlight is overkill, and probably reduces their useful life due to the UV. All you need is sufficient moving air. I hang mine under the deck or just on racks indoors.

Sunlight isn't an overkill. It's a great germ killer (You have to be cautious not to leave them out for too long, lest the UV/Heat damages the colours).

You can use a lot of detergent to remove the last bacteria; but household detergents are a big source of water pollution.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#92

Post by nnain »

mozumder wrote: post #54
spodek wrote: post #7

It's not the fastest clothes dryer, but I often use one that runs on fusion in outer space.

Doesn't the UV end up fading the colors?

A big (practical) problem is that you might not be around to take the clothes of the clothline in time and they end up 'roasting' for extra hours/days. Sunlight definitely does fade the colors.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#93

Post by jdhendrickson »

basicplus2 wrote: post #88

Vibration of molecules... sounds alot like heat energy

As but the difference is in the amount of energy expended vibrating them no? It sounds to me more like vigorously shaking the water off the cloth fibers and then hoovering them up, which is much more energy efficient than heating said water until it turns into a vapor and hoovering it up.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#94

Post by Quequau »

ergothus wrote: post #13
spodek wrote: post #7

It's not the fastest clothes dryer, but I often use one that runs on fusion in outer space.

For apartment goers (or those that live in uncooperative climates) the reliability of such a system is a bigger problem than the speed. But for those that can use it, it is indeed a great system.

I live in a tiny flat in Austria. The vast majority of my washing dries overnight provided I actually get it done around lunch time... even when it's raining. I don't even put it outside most of the time.

If I'm in a major hurry, mostly due to self inflicted procrastination, I'll point a regular fan at the rack as it dries.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#95

Post by tiatia »

Ultrasonic Dryer? Who needs this? And DOE dropped nearly a million on it? Was it an SBIR grant with nice kickbacks? :-)

I found a washing machine with ultrasonic much more interesting:

http://www.tovatech.com/blog/3759/ultrasonic-cleaner/ultraso...

http://www.huffingtonpost.com/2015/01/21/dolfi-washing-devic...

Would be a little worried about stress on your clothes AND/OR Ears. http://www.sciencemag.org/news/2014/09/sounds-you-cant-hear-...

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#96

Post by uncensored »

chroem- wrote: post #80
uncensored wrote: post #33

The logical next leap is to cook food with ultrasound which will hopefully be somewhat faster than conventional cooking and less harmful (no protein denaturing [1]) than microwave cooking 1. https://www.ncbi.nlm.nih.gov/pubmed/11088227

The whole point of cooking food is to denature proteins and kill pathogens. Denatured proteins have exactly the same nutritional content as functional proteins: they're just not folded into their original and potentially dangerous shape anymore.

"denaturing" does sound scary and bad -- It's a dumb way to describe what happens in any cooking process.... it sounds like turning food into plastic before eating it (take the nature our of it) LOL.

Anyway, there are real health risks according to the World Health Organization:

"Food safety: Food safety is an important health issue. In a microwave oven, the rate of heating depends on the power rating of the oven and on the water content, density and amount of food being heated. Microwave energy does not penetrate well in thicker pieces of food, and may produce uneven cooking. This can lead to a health risk if parts of the food are not heated sufficiently to kill potentially dangerous micro-organisms. Because of the potential for uneven distribution of cooking, food heated in a microwave oven should rest for several minutes after cooking is completed to allow the heat to distribute throughout the food."

That sounds like nuking the surface of the food then waiting for it to cook after it has ben microwaved which may or may not fully achieve thorough cooking.

http://www.who.int/peh-emf/publications/facts/info_microwave...

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#97

Post by Tharkun »

Nition wrote: post #47
ergothus wrote: post #13

Earlier quoted context omitted.

For apartment goers (or those that live in uncooperative climates) the reliability of such a system is a bigger problem than the speed. But for those that can use it, it is indeed a great system.

One day we'll invent a technology device to answer the age old question: "Still wet or just cold?"

I press it to my face to answer that question. Somehow my face is much more reliable at telling the difference between cold and wet than my hands.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#99

Post by yetihehe »

sargun wrote: post #44
MrFoof wrote: post #16

Earlier quoted context omitted.

This is the main reason. The difference in the longevity of my clothes -- same exact articles, same brand, same material, thickness, size and stitching -- from switching from a "hotbox" dryer to condensation dryer was initially amazing. No more did cuffs and collars start to crack and fail, nor did my shirts slowly develop small tears. The latest (2014 is when they really started to hit the market) heat pump dryers d…

Do they use the cold side of the heat exchanger to drop the moisture out of the air prior to passing it back through for heating?

Yes, it works exactly this way. I don't have a clothes dryer, but I have condensing air demoisturizer (for places with too much moisture). Works fine when you need to dry some clothes in one room. Also costs MUCH less than full dryer. Air coming out is only a little hotter than room, but sometimes room gets colder due to evaporation from all textiles.

Re: Ultra-low-energy consumption ultrasonic clothes dryer

#100

Post by db48x »

uncensored wrote: post #96
chroem- wrote: post #80

Earlier quoted context omitted.

The whole point of cooking food is to denature proteins and kill pathogens. Denatured proteins have exactly the same nutritional content as functional proteins: they're just not folded into their original and potentially dangerous shape anymore.

"denaturing" does sound scary and bad -- It's a dumb way to describe what happens in any cooking process.... it sounds like turning food into plastic before eating it (take the nature our of it) LOL. Anyway, there are real health risks according to the World Health Organization: "Food safety: Food safety is an important health issue. In a microwave oven, the rate of heating depends on the power rating of the oven and…

That's why your microwave oven has a power setting. It toggles the magnetron on and off during cooking, so that your food cooks more evenly.
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