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re: what uses less energy? an alternative
18 feb 2001
admin01   wrote:

>while living overseas in korea, a place of very high energy costs,
>i noticed many people had 'spin dryers'. for practical purposes,
>it was like the spin cycle on a washer, but on steroids.

i used a phillips horizontal axis machine with a slow intermittent
soak/wash and a fast spin when i lived in france. half the size of
a us machine. contained its own heater. took an hour or two. nice.

>i don't know the rpm, but *much faster* than a washer spin cycle,
>and they all sounded like jets taking off.

entertainment... do they put clickers inside to make it sound like
it's doing a really fine job?

>while the clothes were not dry by an electric or gas dryer's standard,
>they were much dryer than what comes out of a washing machine...

they probably contained something like 50% moisture. i talked with
the makers of ge (800-626-2000), maytag (800-688-9900), kenmore
(888-536-6673), staber (800-848-6200), equator (800-935-1955), and
asko (972-238-0794) washing machines last week. staber said their
clothes emerge from the spin cycle of their $1284 1000 rpm machine 
with 50-52% moisture by weight.

marty from asko said a 1 pound towel can hold 2 pounds of water,
and their $2108 1600 rpm stainless steel washing machine removes
"94% of the rmc," which means "removable moisture content" by
their definition (and "remaining moisture content" by others.)
he finally said the clothes emerge with 49% moisture by weight.

the equator person said her technician told her the clothes contain
"15-20% moisture," but she seemed very vague about that. ge, maytag,
and kenmore eventually called back and said the answer to this question
depends on continuously mutable variables ("are we talking undies or
sweaters?"), they have never measured it, and so on.

it's easy enough to measure the "dry weight" of clothes going in and
the wet weight coming out of the spin cycle, or measure them after the
spin cycle, then again, after an hour or two in a dryer or a night in
a 150 f oven. less moisture means less drying energy. a 10 cent kwh
can evaporate about 3.4 pounds of water.

there's an oak ridge bern clothes washer study on the doe site with
a 1998 final report ornl/m-6382. the bernese citizens tested lots of
washing machines. section 5.1 of the report says the usual vertical
axis washers left 68% moisture ("rmc") in clothes and the horizontal
axis machines ordinarily left 50% with a 20 pound load, vs 48% with
light 6-7 pound loads, using the "turbo-spin" button.

nick




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