Friction heater running in my house

[slapstick]

Hello everyone,


It's nice to see people building the drum on drum style friction heater, but remember the better you make this the better the heat will be. Don't for get to balance the drum.

Thank you
Gabriel

[wrtner]

Don't for get to balance the drum.

And don't forget thqat it needs to be dynamically balanced
and not statically balanced. (Since it will go at a fair lick).

Paul-R

[lostbraincell]

Too flat 1/8: steel plates.i used 18" X 30"bottom plate welded 4 1/4 20 nuts to just fit inside paint can. short pipe cut to fit bearing.Welded in center. 5/8" steel stock for drive shaft washer welded to shaft to hold in place.1/2" from that a another washer welded to put disks on.1/4" all thread for stationary plates. hand cut with tin snipes.center disks i used 4 1/2" grinding disks i used this so i could statically balance.used 5/8" washers as spacers used 1/4" nuts and washers as spacers on sheet metal."note" assemble with out paint can to compress spring app 50 lb tension on spring.i made 6 all thread spacers with sleeves from 1/2" conduit so can would not get crushed when putting top on.ujusted by eye tolerances app 1/16" in. i placed sheet mettel, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle.I found i only needed 4 disks 850rpm heats slowly 1200rpm 31.5 F in 10 min light wt cooking oil.

[wrtner]

Too flat 1/8: steel plates.i used 18" X 30"bottom plate welded 4 1/4 20 nuts to just fit inside paint can. short pipe cut to fit bearing.Welded in center. 5/8" steel stock for drive shaft washer welded to shaft to hold in place.1/2" from that a another washer welded to put disks on.1/4" all thread for stationary plates. hand cut with tin snipes.center disks i used 4 1/2" grinding disks i used this so i could statically balance.used 5/8" washers as spacers used 1/4" nuts and washers as spacers on sheet metal."note" assemble with out paint can to compress spring app 50 lb tension on spring.i made 6 all thread spacers with sleeves from 1/2" conduit so can would not get crushed when putting top on.ujusted by eye tolerances app 1/16" in. i placed sheet mettel, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle.I found i only needed 4 disks 850rpm heats slowly 1200rpm 31.5 F in 10 min light wt cooking oil.

Dear Lost,

Are the sheet metals items stainless steel or mild steel?

I ask because Gabriel has been magnetising his sheets,
and SS will not take magnetising.

[lostbraincell]

Hi come to think of it i put a neo magnet inside bottom.cheep as possible maybe have $40 in this and spare parts.the objects I'm trying for is, 1 under 200 watts, 2 small size forced air heater. Getting +108f in 45 min. Have a very small leak at bottom need to rebuild and rethink sealing at bottom.

[RAMSET]

Understanding the number

Lost
If you want to get a "feel" for your efficiency at this point
take 2 -100 watt light bulbs [if that is your power consumption] and put them into your unit instead of the "device".
run your same test..... see what you get?

be aware, light bulbs are not as efficient for this purpose.

@Slapstick has an open Offer for "free" testing by a very qualified and trusted party!

Thx
Chet

[slapstick]

Lost
If you want to get a "feel" for your efficiency at this point
take 2 -100 watt light bulbs [if that is your power consumption] and put them into your unit instead of the "device".
run your same test..... see what you get?

be aware, light bulbs are not as efficient for this purpose.

@Slapstick has an open Offer for "free" testing by a very qualified and trusted party!

Thx
Chet

Hello Chet,

I am working on the test model, it should be ready for shipping around mid to the end of January.

Thank you
Gabriel

[slapstick]

Too flat 1/8: steel plates.i used 18" X 30"bottom plate welded 4 1/4 20 nuts to just fit inside paint can. short pipe cut to fit bearing.Welded in center. 5/8" steel stock for drive shaft washer welded to shaft to hold in place.1/2" from that a another washer welded to put disks on.1/4" all thread for stationary plates. hand cut with tin snipes.center disks i used 4 1/2" grinding disks i used this so i could statically balance.used 5/8" washers as spacers used 1/4" nuts and washers as spacers on sheet metal."note" assemble with out paint can to compress spring app 50 lb tension on spring.i made 6 all thread spacers with sleeves from 1/2" conduit so can would not get crushed when putting top on.ujusted by eye tolerances app 1/16" in. i placed sheet mettel, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle.I found i only needed 4 disks 850rpm heats slowly 1200rpm 31.5 F in 10 min light wt cooking oil.

Hello

Well done

If you follow my design you will get temps well over 350F.

With the oil at ambient air temp or a "cold start" Lets call it 60F at cold start, the temp will be well over 200F in about 20 to 25 min and reach max set temp in about 40 to 60 min.

Thank you
Gabriel

[theremart]

hmmm idea.

I have been following this thread, and had an idea.

My Vitamix blender can boil water in about 5 min turning at 32,000 RPM. It pulls about 400 watts to do so.

My idea is to forget about the disks, and simply create friction by slamming the oil into a grooved walled container like the vitamix blender has. The oil hitting the sides of the container should cause heat in the same way as the disks...

The advantage I see with this idea ( if it would work ) is that one would not need the tight tolerances with the plates.

Something to think about.

[wrtner]

My Vitamix blender can boil water in about 5 min turning at 32,000 RPM. It pulls about 400 watts to do so.

400 watt for 5 mins = 0.033 KWH

All we need now is the calorific value of water to determine the
KWH needed to raise one Litre (???) of water from about 70 deg C
to 100deg C

[bolt1]

My 400 watts camping kettle will boil a litre of water in about 5 mins too! Its pretty quite has no moving parts, no oil and cost about $9.00

[RAMSET]

Bolt
How are you sir?
the line in the sand [unity] is 0.1 KWH [100 watts total]input power 1 liter water raised 120 F.[ a tuff nut to crack].

A very ruff line ,but useful for the moment.

@Gabriel
Good to hear your setting things up for the test,Nice to have a community willing to help each other!

Thx
Chet

[theremart]

RE: calculation.

400 watt for 5 mins = 0.033 KWH

All we need now is the calorific value of water to determine the
KWH needed to raise one Litre (???) of water from about 70 deg C
to 100deg C

Yep that would give a base line. Then one could experiment with different cylinder shapes, and different propellers at the base of the blender, at different speeds. It could be automated to test with Adrino to find optimum for a given motor / setup with a temp probe.

[Blargus]

Too flat 1/8: steel plates.i used 18" X 30"bottom plate welded 4 1/4 20 nuts to just fit inside paint can. short pipe cut to fit bearing.Welded in center. 5/8" steel stock for drive shaft washer welded to shaft to hold in place.1/2" from that a another washer welded to put disks on.1/4" all thread for stationary plates. hand cut with tin snipes.center disks i used 4 1/2" grinding disks i used this so i could statically balance.used 5/8" washers as spacers used 1/4" nuts and washers as spacers on sheet metal."note" assemble with out paint can to compress spring app 50 lb tension on spring.i made 6 all thread spacers with sleeves from 1/2" conduit so can would not get crushed when putting top on.ujusted by eye tolerances app 1/16" in. i placed sheet mettel, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle,space,space, sheet mettle, disk, sheet mettle.I found i only needed 4 disks 850rpm heats slowly 1200rpm 31.5 F in 10 min light wt cooking oil.

Thanks a lot I appreciate it! I was thinking smaller scale at first...finally found some compatible cans I think--diameter 1/4" apart!

[wrtner]

Thanks a lot I appreciate it! I was thinking smaller scale at first...finally found some compatible cans I think--diameter 1/4" apart!

It may be difficult to keep the system together structurally. You are going
to need bearings at each end.

The material is very weak. Can you find a couple of stainless steel
vessels, maybe in one of those cheap kitchen supply shops?