http://www.crosslee.co.uk/cl847.html

http://cgi.ebay.co.uk/ws/eBayISAPI.d..._BID_Stores_IT

Further info:

Declared/published performance of the 847 A Class machine is:
With test conditions as stipulated in EN 61121- European standard.
Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

Please note that modern washing machines spin dry at higher spinning speeds
than when the standard was written so better performance can be expected...

.... 2.5kWhx3412/7.7lb = 1108 Btu/lb. Given the long drying time, this might
be vented indoors... 7.7/8 = 0.96 lb/h, so it would only raise the indoor
humidity ratio of an average house in Phila with 224 cfm of air leakage in
January to 0.0025+0.96/(60x224x0.075) = 0.00345, ie 22% RH at 70 F.

But is there a non-heat-pump machine that dries with less than
1000 Btu/lb of electrical energy, like an indoor clothesline?

Nick

Dumb nick , venting indoors, dust and Ng by products. Do you ever do
anything you pitch yourself?

m Ransley again errs:

Dumb nick , venting indoors, dust and Ng by products.

I disagree. This is an electric dryer. Dust can be filtered,
and heat and mild humidity can be useful in wintertime.

Do you ever do anything you pitch yourself?

Sure. I use indoor and outdoor clotheslines.

Nick

In article ,
says...
Dumb nick , venting indoors, dust and Ng by products.

Not sure what Ng byproducts you'd need to worry about with the
electric dryers he was talking about.

--
is Joshua Putnam
http://www.phred.org/~josh/
Updated Bicycle Touring Books List:
http://www.phred.org/~josh/bike/tourbooks.html

In article ,
says...
http://www.crosslee.co.uk/cl847.html

http://cgi.ebay.co.uk/ws/eBayISAPI.d..._BID_Stores_IT

Further info:

Declared/published performance of the 847 A Class machine is:
With test conditions as stipulated in EN 61121- European standard.
Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

Please note that modern washing machines spin dry at higher spinning speeds
than when the standard was written so better performance can be expected...

... 2.5kWhx3412/7.7lb = 1108 Btu/lb. Given the long drying time, this might
be vented indoors... 7.7/8 = 0.96 lb/h, so it would only raise the indoor
humidity ratio of an average house in Phila with 224 cfm of air leakage in
January to 0.0025+0.96/(60x224x0.075) = 0.00345, ie 22% RH at 70 F.

But is there a non-heat-pump machine that dries with less than
1000 Btu/lb of electrical energy, like an indoor clothesline?


Yeah. An indoor clothesline. It is very common in my
area to use a folding wire rack, sold expressly for
that purpose. Works especially well if you have direct
sunlight coming in your window.

I would only go back to using mechanical dryers if I
were living in an extremely small space, and/or had to
use a public laundromat, where I didn't want to haul
wet clothes back home.

Cost: One-time $15 for the rack, plus zero ongoing.

Why do people have such an attachment to those
mechanical power-hogs?


--
Get Credit Where Credit Is Due
http://www.cardreport.com/
Credit Tools, Reference, and Forum

"Antipodean Bucket Farmer" wrote

Why do people have such an attachment to those
mechanical power-hogs?


With 5 kids and all of them playing some kind of organized sport, where in
the world would I be able to hang clothes up to dry?

Besdies, my dryer is not a power hog. It nibbles.....

m Ransley wrote:
Dumb nick , venting indoors, dust and Ng by products. Do you ever do
anything you pitch yourself?

Electric dryer? In any case while I would agree that good filters can
stop most of the lint, I personally would prefer not to have any and to vent
it outside.

--
Joseph Meehan

Dia duit

On 25 Nov 2005 11:30:10 -0500, wrote:

http://www.crosslee.co.uk/cl847.html

http://cgi.ebay.co.uk/ws/eBayISAPI.d..._BID_Stores_IT

Further info:

Declared/published performance of the 847 A Class machine is:
With test conditions as stipulated in EN 61121- European standard.
Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

Please note that modern washing machines spin dry at higher spinning speeds
than when the standard was written so better performance can be expected...

... 2.5kWhx3412/7.7lb = 1108 Btu/lb. Given the long drying time, this might
be vented indoors... 7.7/8 = 0.96 lb/h, so it would only raise the indoor
humidity ratio of an average house in Phila with 224 cfm of air leakage in
January to 0.0025+0.96/(60x224x0.075) = 0.00345, ie 22% RH at 70 F.

But is there a non-heat-pump machine that dries with less than
1000 Btu/lb of electrical energy, like an indoor clothesline?

Nick

I can't answer your question, but since we're on the topic, for
interest I just monitored one of our typical laundry loads.

Machine is a Splendide 2000, vented model. Capacity advertised at 5kg
washing, 3kg washing/drying. Set for regular wash, warm/cold, high
spin, half heat, 30 minutes drying.

Load was a mix of shirts, T-shirts, hand towels, washcloths, socks and
underwear. 5lb according to an electronic bath scale which is too
crude for the purpose. IMO the machine would be quite happy with a 50%
larger load. But since my wife disagrees and I don't need any more
chores... ;-)

Assuming I didn't miss anything (I didn't stand over it the whole
time), it filled once and spent about 45 minutes washing. In this mode
it spends about 12 seconds turning one way, rests for 5, reverses.
About 180W while turning according to a KillaWatt, on which the
display never really stabilized due to the constantly changing
consumption.

After the wash cycle, the machine drains and refills for rinse, short
wash action, drains and spins for a short time. Repeats, two rinses
total.

Next it enters spin mode, perhaps 10 minutes of various tumbling, spin
speed ramp-up and pumping. Power consumption tops out at about 400W
until it goes into scary-spin mode, about 500W steady for another 10
minutes.

70 minutes to this point, .21kWh. Removed clothes and weighed, about
1.5lb gain. Too wet to hang up IMO. Clothes would probably drip, and
dry crispy.

Replaced clothes for drying, 700W steady for 20 minutes. Vent air is
very gentle flow, barely warmer than room air. Last 10 minutes is by
design tumbling with heat off. Consumption down to about 100W when
drum is turning, about 150W with pump combined.

Total time 1:45. Total consumption .45kWh. No detectable weight loss
since spinning, but my scale was too useless to tell. Clothes were
definitely drier though, plenty dry enough to hang up. Shirts clammy
but wearable in a pinch on a summer day. Although I'm sure that any
self-respecting yuppie would leave them in at least another half hour.

Wayne

wmbjk wrote:

http://www.crosslee.co.uk/cl847.html

Declared/published performance of the 847 A Class machine is:
With test conditions as stipulated in EN 61121- European standard.
Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

... 2.5kWhx3412/7.7lb = 1108 Btu/lb.

Machine is a Splendide 2000, vented model...

... it filled once and spent about 45 minutes washing. In this mode
it spends about 12 seconds turning one way, rests for 5, reverses.

The Philips machine I used in France rested about 5 minutes.

Next it enters spin mode, perhaps 10 minutes of various tumbling, spin
speed ramp-up and pumping. Power consumption tops out at about 400W
until it goes into scary-spin mode, about 500W steady for another 10 minutes.

Scary-spin mode sounds like fun. UK machines are rated by rpm.

70 minutes to this point, .21kWh. Removed clothes and weighed, about
1.5lb gain.

Replaced clothes for drying, 700W steady for 20 minutes. Vent air is
very gentle flow, barely warmer than room air. Last 10 minutes is by
design tumbling with heat off. Consumption down to about 100W when
drum is turning, about 150W with pump combined.

Total time 1:45. Total consumption .45kWh. No detectable weight loss
since spinning, but my scale was too useless to tell.

Hmmm. The 5 pounds of clothes still weighed 6.5 pounds after "drying"?

The energy consumption was low, but this experiment seems inconclusive.

Nick

On 28 Nov 2005 01:25:10 -0500, (Nick
Pine) wrote:

wmbjk wrote:

http://www.crosslee.co.uk/cl847.html

Declared/published performance of the 847 A Class machine is:
With test conditions as stipulated in EN 61121- European standard.
Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

... 2.5kWhx3412/7.7lb = 1108 Btu/lb.

Machine is a Splendide 2000, vented model...

... it filled once and spent about 45 minutes washing. In this mode
it spends about 12 seconds turning one way, rests for 5, reverses.

The Philips machine I used in France rested about 5 minutes.

I didn't stand over it, so it may have rested longer at times. And I'd
expect that the other programs would include less washing, perhaps
less rinsing as well. A chart in the manual seems to confirm that. For
the "knits and delicates" program it shows "S" agitate speed, and 650
spin speed. But the energy for agitating on our machine is perhaps
60Wh per load, so there's not a lot to save regardless.

Next it enters spin mode, perhaps 10 minutes of various tumbling, spin
speed ramp-up and pumping. Power consumption tops out at about 400W
until it goes into scary-spin mode, about 500W steady for another 10 minutes.

Scary-spin mode sounds like fun. UK machines are rated by rpm.

Perhaps they should be rated in Gs to account for drum diameter. :-)
Anyway, I looked it up for you - 1100 RPM max. How does it compare?

70 minutes to this point, .21kWh. Removed clothes and weighed, about
1.5lb gain.

Replaced clothes for drying, 700W steady for 20 minutes. Vent air is
very gentle flow, barely warmer than room air. Last 10 minutes is by
design tumbling with heat off. Consumption down to about 100W when
drum is turning, about 150W with pump combined.

Total time 1:45. Total consumption .45kWh. No detectable weight loss
since spinning, but my scale was too useless to tell.

Hmmm. The 5 pounds of clothes still weighed 6.5 pounds after "drying"?

More correctly, the load weighed that much after spinning. My scale
wasn't accurate enough to detect the weight loss after drying so I
described it as best I could. We have one of those chintzy baby scales
as well, so I may try using that on another load for interest. Since
the thinner items were relatively dry, I expect that most of the
moisture still remaining was in the towels and washcloths. I don't
generally pay this much attention to the washing, but in my new role
as Iaundry critic, I noticed this morning that those towels are
definitely crispy to the touch. I suppose for maximum efficiency one
could remove the lighter items after a half-hour and leave the heavy
ones in longer. But I will *not* be making any recommendations. :-)

The energy consumption was low, but this experiment seems inconclusive.

It wasn't an experiment, merely some quick and dirty observations to
give an idea of how one machine works and how we use it. Perhaps I'll
post similar notes on the dishwasher as well since these per-use
energy consumption figures with setting details seem to be hard to
come by.

Wayne

wmbjk wrote:

Next it enters spin mode, perhaps 10 minutes of various tumbling, spin
speed ramp-up and pumping. Power consumption tops out at about 400W
until it goes into scary-spin mode, about 500W steady for another 10 minutes.

Scary-spin mode sounds like fun. UK machines are rated by rpm.

Perhaps they should be rated in Gs to account for drum diameter. :-)
Anyway, I looked it up for you - 1100 RPM max. How does it compare?

Like 30 years ago, I had a European Hoover mini-washer, the kind you
rolled in and clamped onto the faucet. (You can see one in use in the
movie "Performance" which is worth seeing even if you're not interested
in European washers). All very water and energy and space efficient.
Anyway, you had to pull the clothes out of the washer part yourself (so
you could thriftily reuse the water for the next load) and stuff them
in a little centrifuge spin dry chamber, then let er rip. Scary-spin
indeed. I think that baby would have separated heavy water out. Of
course the clothes came out barely damp, so you saved all that energy
not having to dry them as much.

wmbjk wrote:

It wasn't an experiment, merely some quick and dirty observations to
give an idea of how one machine works and how we use it. Perhaps I'll
post similar notes on the dishwasher as well since these per-use
energy consumption figures with setting details seem to be hard to
come by.

Wayne

My sears front loader spins at 1000 rpm. I'll put the kWh meter on it today.

--
Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html

Does it have a fan blade on it too? I think they are
talking about the clothes drum, not the blower...LOL

"Steve Spence" wrote in
message ...
wmbjk wrote:

It wasn't an experiment, merely some quick and
dirty observations to
give an idea of how one machine works and how we
use it. Perhaps I'll
post similar notes on the dishwasher as well since
these per-use
energy consumption figures with setting details
seem to be hard to
come by.

Wayne

My sears front loader spins at 1000 rpm. I'll put the
kWh meter on it today.

--
Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html

Solar Flare wrote:
Does it have a fan blade on it too? I think they are
talking about the clothes drum, not the blower...LOL


Hmm.. You seem to have problems comprehending again. Yes, it's the drum
that spins at 1000 rpm .....

--
Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html

ditto. I was a very obvious joke. (LOL may indicate
this)

That's a pretty fast spin cycle. It's a good thing they
are only off balance when they first start up. Mine has
danced across the rom a few times before the pinball
tilt switch picks up on it and shuts it down.


"Steve Spence" wrote in
message ...
Solar Flare wrote:
Does it have a fan blade on it too? I think they
are
talking about the clothes drum, not the
blower...LOL


Hmm.. You seem to have problems comprehending again.
Yes, it's the drum
that spins at 1000 rpm .....

--
Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html

wmbjk wrote:

http://www.crosslee.co.uk/cl847.html

Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

... 2.5kWhx3412/7.7lb = 1108 Btu/lb.

.... of electrical energy, vs 0 Btu/lb for an indoor clothesline.
I wonder how often the drum moves and how much of that energy
comes from the motor.

Scary-spin mode sounds like fun. UK machines are rated by rpm.

Perhaps they should be rated in Gs to account for drum diameter. :-)

They are, on some sites.

Anyway, I looked it up for you - 1100 RPM max. How does it compare?

I'm not sure. One US DOE site lists "Remaining Moisture Content" standards
after spins...

warm spin cold spin

15 min 4 min 15 min 4 min

100 Gs ~45% ... 50%
...
500 Gs 24% ... 30%

Total time 1:45. Total consumption .45kWh. No detectable weight loss
since spinning, but my scale was too useless to tell.

Digital scales are getting cheaper...


~~~~~

If we can tumble-dry a load of clothes containing 5 pounds of water in
0.5 hours at 130 F with Ps = 4.53" Hg and Pd = 0.374 (?) (70 F at 50% RH
with wd = 0.00788, approximately) and 0.1A(Ps-Pd)0.5 = 5, using an ASHRAE
swimming pool formula, we might say their equivalent area A = 24 ft^2.
Let's arbitrarily reduce this to 10 ft^2, with no tumbling, which makes
the numbers easy: drying time = 5/(Ps-Pd).

So an indoor clothesline in free air at 70 F and 50% RH might dry in 5/0.374
= 13.3 h at an approximate Twb = 9621/(22.47-ln(460+70+37.4-Twb). Plugging in
510 R (50 F) on the right makes Twb = 522 on the right, then 516, 519, 517.3,
518.5, 517.8, 518.2, and 518.0 R (58.0 F)

If we dry clothes in 20 hours in a closet with C cfm of airflow at 0.25 lb/h,
Pd = 29.921/(1+0.62198/(0.00788+0.25/(4.5C)) = (4.2441C+29.921)/(11.338C+1)
and Ps = e^(17.863-9621/(460+T)) = Pd + 0.25 = (7.0583C+30.171)/(11.338C+1).
If the only heat comes from room air, (70-T)C = 1000P = 250, so T = 70-250/C
= 9621/(17.863-ln(Ps))-460, ie C = 250/(530-9621/(17.863-ln(Ps))). Plugging
in C = 100 on the right makes C = 60 cfm on the left, then 74, 67, 70, 68.5,
69.0, and 68.8, which makes T = 70-250/68.9 = 66.4 F, approximately.

If we speed this up with closet insulation and heat, 10 hours at 100 F makes
Ps = 1.979 "Hg, Pd = Ps - 0.5 = 1.479, wd = 0.62198/(29.921/Pd-1) = 0.03234
= 0.00788 + 0.5/(4.5C), and C = 4.54 cfm (not much), with 10h(100-70)4.54
= 1363 Btu of heat, about 0.4 kWh, only 27% of the water's latent heat :-)

With good insulation, longer drying times and higher temps and less airflow
minimize the electrical energy needed for drying: 5 hours at 120 F make Ps
= 3.579 "Hg, Pd = Ps - 1 = 2.579, wd = 0.62198/(29.921/Pd-1)) = 0.05867, and
C = 4.38, with 5h(120-70)4.38 = 1094 Btu, ie 0.32 kWh... 10 hours makes Pd
= Ps - 0.5 = 3.079, wd = 0.62198/(29.921/Pd-1)) = 0.07134, and C = 1.75 cfm,
with 10h(120-70)1.75 = 875 Btu, ie 0.26 kWh. This might come from a Holmes
HFH111 1500 W fan space heater ($12.88 at Wal-Mart) with its thermostat set
to 130 F (if that's below the upper temp limit) running 100x260Wh/(1500Wx10h)
= 1.7% of the time.

If we dislike stiff clothes and don't mind extra labor, we might put
a dryer inside the closet with a sequencer that only turns it on for
1 out of every 10 minutes and a humidistat and fan that circulates
room air through the closet when the RH reaches 80%.

Nick

http://www.crosslee.co.uk/cl847.html describes

Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

... 2.5kWhx3412/7.7lb = 1108 Btu/lb.

.... of electrical energy, about 10% more than the latent heat, vs 0 Btu/lb
for an indoor clothesline. How often does the drum move and how much of
that energy comes from the motor? US dryers have no yellow energy labels,
but they probably use a lot more, on the order of 5kW x 1 hour.

If we can tumble-dry a load of clothes containing 5 pounds of water in
0.5 hours at 130 F with vapor pressure Ps = 4.53" Hg near the clothes and
Pd = 0.374 "Hg(?) in dryer air (70 F at 50% with wd = 0.00788, approximately)
and 0.1A(Ps-Pd)0.5 = 5, using an ASHRAE swimming pool formula, we might say
their equivalent area A = 24 ft^2. Let's arbitrarily reduce this to 10 ft^2,
with no tumbling, which makes the numbers easy: drying time = 5/(Ps-Pd).
An indoor clothesline with lots of 70 F airflow might dry clothes in 5/0.374
= 13.6 hours.

Drying in 20 hours in a T (F) closet with C cfm of airflow at 0.25 lb/h
makes wd = 0.00788+0.25/(60x0.075C) and Pd = 29.921/(1+0.62198/wd)
= (4.2441C+29.921)/(11.338C+1) and Ps = Pd+0.25 = (7.0583C+30.171)/(11.338C+1).
If heat only comes from room air, (70-T)C = 1000P = 250 Btu/h, approximately,
T = 70-250/C = 9621/(17.863-ln(Ps))-460, ie C = 250/(530-9621/(17.863-ln(Ps))),
using a Clausius-Clapeyron approximation. Plugging in C = 100 on the right
makes C = 60 cfm on the left, then 74, 67, 70, 68.5, 69.0, and 68.8, which
makes T = 66.4 F, approximately.

Drying in 8 hours in a 130 F closet makes Pd = 4.53-0.625 = 4.47 "Hg, and
T = 9621/(17.863-ln(Pd))-460 = 128 F at 100% RH, so we might condense 5 lb of
water on a 128 F or cooler surface. If P pounds of water starts at 70 F and
warms to 128, (128-70)P = 5000 Btu makes P = 86 pounds, eg 20 2-liter 4"x12"
soda bottles in a 16"x20"x12" tall box, adding no water vapor to house air,
with 5000 Btu of drying energy from a heater, with perfect closet insulation.

Now suppose we have 2 86 pound heat batteries, A at 70 F and B charged up to
about 130 F with condensation from drying a load of clothes, and we remove
the clothes and put in another load and use B to heat closet air until A
reaches 100 F, then use the heater to warm closet air until A reaches 130
and the clothes are dry, with half the usual energy. Then we cool B to 70 F
with room air and repeat the cycle. What can we do with 3 batteries?

Is there a continuous- vs discrete-battery process that can dry clothes with
a small fraction of their latent heat? An efficient condensing clothes dryer
might use very little energy to move liquid water from one place to another.

Nick

Nick Pine wrote:
wmbjk wrote:

http://www.crosslee.co.uk/cl847.html

Declared/published performance of the 847 A Class machine is:
With test conditions as stipulated in EN 61121- European standard.
Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

... 2.5kWhx3412/7.7lb = 1108 Btu/lb.

Machine is a Splendide 2000, vented model...

... it filled once and spent about 45 minutes washing. In this mode
it spends about 12 seconds turning one way, rests for 5, reverses.

The Philips machine I used in France rested about 5 minutes.

Next it enters spin mode, perhaps 10 minutes of various tumbling, spin
speed ramp-up and pumping. Power consumption tops out at about 400W
until it goes into scary-spin mode, about 500W steady for another 10 minutes.

Scary-spin mode sounds like fun. UK machines are rated by rpm.

800 rpm spin is basic, 1000 so so, top end ones do 1400 now. At 800
clothes come out saturated, at 1300 they come out no more than damp.
Theres really no need for a dryer if youve got a fast spin washer, but
for some reason driers have become common anyway.

(The old twintubs used to do around 2000-2500 rpm, but that was with a
much smaller drum.)

Machine design is an ongoing issue, getting them to do high spin speeds
without jumping about, pummelling other nearby appliances or dancing
across the floor. This is a common fault mode. Modern machines need to
have off balance load sensors so they dont try to spin up when not
distributed correctly, If they did, the drum housing would break. As
you can guess, heavy vibration is normal.



NT

In article .com,
says...
Nick Pine wrote:
wmbjk wrote:

http://www.crosslee.co.uk/cl847.html

Declared/published performance of the 847 A Class machine is:
With test conditions as stipulated in EN 61121- European standard.
Dry cotton load = 5kg, Room temperature 20C
Energy to dry the above load in A class mode = 2.5 kWh
Wetted condition of test load = 70% so 3.5kg of water or 7.7 lbs
Time to dry the test load under these conditions = 8hrs.

... 2.5kWhx3412/7.7lb = 1108 Btu/lb.

Machine is a Splendide 2000, vented model...

... it filled once and spent about 45 minutes washing. In this mode
it spends about 12 seconds turning one way, rests for 5, reverses.

The Philips machine I used in France rested about 5 minutes.

Next it enters spin mode, perhaps 10 minutes of various tumbling, spin
speed ramp-up and pumping. Power consumption tops out at about 400W
until it goes into scary-spin mode, about 500W steady for another 10 minutes.

Scary-spin mode sounds like fun. UK machines are rated by rpm.

800 rpm spin is basic, 1000 so so, top end ones do 1400 now. At 800
clothes come out saturated, at 1300 they come out no more than damp.
Theres really no need for a dryer if youve got a fast spin washer, but
for some reason driers have become common anyway.

(The old twintubs used to do around 2000-2500 rpm, but that was with a
much smaller drum.)

Machine design is an ongoing issue, getting them to do high spin speeds
without jumping about, pummelling other nearby appliances or dancing
across the floor. This is a common fault mode. Modern machines need to
have off balance load sensors so they dont try to spin up when not
distributed correctly, If they did, the drum housing would break. As
you can guess, heavy vibration is normal.

My Miele could spin at 1600 rpm, and the vibration was barely
perceptible. Of course, it had 150 lbs of concrete in its base...

--Gene

Gene S. Berkowitz wrote:
In article .com,
says...

Machine design is an ongoing issue, getting them to do high spin speeds
without jumping about, pummelling other nearby appliances or dancing
across the floor. This is a common fault mode. Modern machines need to
have off balance load sensors so they dont try to spin up when not
distributed correctly, If they did, the drum housing would break. As
you can guess, heavy vibration is normal.

My Miele could spin at 1600 rpm, and the vibration was barely
perceptible. Of course, it had 150 lbs of concrete in its base...

--Gene

... and was a Miele, which is not your average machine. Were the clothes
creased much at 1600?


NT

On the subject of offgrid driers, I expect it would make more sense to
use solar heat, either passing solar hot air through a standard drier,
or else putting a rotating drum or even just clothes line in the solar
heater itself.

NT

In article . com,
says...
Gene S. Berkowitz wrote:
In article .com,
says...

Machine design is an ongoing issue, getting them to do high spin speeds
without jumping about, pummelling other nearby appliances or dancing
across the floor. This is a common fault mode. Modern machines need to
have off balance load sensors so they dont try to spin up when not
distributed correctly, If they did, the drum housing would break. As
you can guess, heavy vibration is normal.

My Miele could spin at 1600 rpm, and the vibration was barely
perceptible. Of course, it had 150 lbs of concrete in its base...

--Gene

.. and was a Miele, which is not your average machine. Were the clothes
creased much at 1600?

Nobody said anything about "average", just "modern".
We generally used the maximum spin for cottons like towels and undies,
never noticed any creasing.

--Gene

Gene S. Berkowitz wrote:
In article . com,
says...

Gene S. Berkowitz wrote:

In article .com,
says...

Machine design is an ongoing issue, getting them to do high spin speeds
without jumping about, pummelling other nearby appliances or dancing
across the floor. This is a common fault mode. Modern machines need to
have off balance load sensors so they dont try to spin up when not
distributed correctly, If they did, the drum housing would break. As
you can guess, heavy vibration is normal.

My Miele could spin at 1600 rpm, and the vibration was barely
perceptible. Of course, it had 150 lbs of concrete in its base...

--Gene

.. and was a Miele, which is not your average machine. Were the clothes
creased much at 1600?


Nobody said anything about "average", just "modern".
We generally used the maximum spin for cottons like towels and undies,
never noticed any creasing.

--Gene


My sears unit runs at 1000 rpm, very little water left in the clothes,
no creasing.


--
Steve Spence
Dir., Green Trust, http://www.green-trust.org
Contributing Editor, http://www.off-grid.net
http://www.rebelwolf.com/essn.html