Multi Fuels

Re: Multi Fuels

PostBy: Scottscoaled On: Sun Jan 26, 2014 12:46 pm

I still have issue with the wet insulation around the pex. It is a major problem.
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Last edited by Scottscoaled on Sun Jan 26, 2014 12:51 pm, edited 1 time in total.
Scottscoaled
 
Stoker Coal Boiler: EFM 520x4, 350, 700. Van Wert 400 x 2, 800, 1200.
Coal Size/Type: Lots of buck

Re: Multi Fuels

PostBy: Lightning On: Sun Jan 26, 2014 12:47 pm

Rob R. wrote:If the pex lines are uninsulated in a single piece of PVC, won't the heat try to transfer from the supply to return? Not sure how much...depends how tight the lines are to one another.


My send and return to my hot tub are in a single PVC pipe. It's a very tight too.

Seems to work out for what ever reason lol. No idea if they were separated if it would make a difference. The heat has to get there, otherwise the loop would boil, wouldn't it?
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut Size / White Ash

Re: Multi Fuels

PostBy: Rob R. On: Sun Jan 26, 2014 12:54 pm

windyhill4.2 wrote:Sorry,i was not trying to beat on him,only trying to clarify a few things.My key board does not have the alphabet in order so typing goes slow for me,besides,repetition is often the only way to get thru my thick skull or slow functioning brain. :) Rob R. is it really critical if the pipe temps are similar IF you have hot enough water for needed heat ? at least the water going back to boiler is not cold in that scenario.


If it heats the house, then no, it doesn't matter. I don't know how much of an issue it is anyway, just mentioned it. It is generally preferred to insulate each pipe separately.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Multi Fuels

PostBy: windyhill4.2 On: Sun Jan 26, 2014 1:11 pm

WOW, Scottscoaled, that is a very distinct melt line,i saw your pic.& looked outside where my pex line is ,i know where it is because i put it ther but if you were to look you would have no idea,snow cover is the same ! Rob R. some are very adamant about separation of the 2 pipes,we do have some insulation between ours.
windyhill4.2
 
Hand Fed Coal Stove: Crane 404 with variable blower
Other Heating: Oaktree OWB 600K

Re: Multi Fuels

PostBy: dchartt On: Sun Jan 26, 2014 1:13 pm

never thought about the return getting warmer going back to the boiler good point, 3 inch pvc with two 1 inch pex lines inside...have never had any snow melt on top of where my line is WOW! and your set on it being wet insulation and not the fact its only 2 1/2 ft below the surface???
dchartt
 
Stoker Coal Boiler: AHS 130
Hand Fed Coal Stove: Glacier Bay

Re: Multi Fuels

PostBy: windyhill4.2 On: Sun Jan 26, 2014 1:22 pm

My lyme riddled brain works a bit slow at times & dchartt your reply does point out a downside to sending the water temp back at similar temp it left the boiler. If water temp is too little change that would prevent the boiler coming on until all the water temp is low ,causing more of the wide swings of up & down cycling.
windyhill4.2
 
Hand Fed Coal Stove: Crane 404 with variable blower
Other Heating: Oaktree OWB 600K

Re: Multi Fuels

PostBy: dchartt On: Sun Jan 26, 2014 1:28 pm

Do you actually think though that the return is rising in temp that much in the amount of time it travels 140 ft? I honestly dont see it I think thats a bit far fetched, how did your grandpop say it freetown fred?
What about my return cooling down my supply? Im not buying it
dchartt
 
Stoker Coal Boiler: AHS 130
Hand Fed Coal Stove: Glacier Bay

Re: Multi Fuels

PostBy: Dennis On: Sun Jan 26, 2014 1:40 pm

see if you can buy or even borrow a infered thermoter and check the return and supply lines(both) from the boiler to the house boiler and both lines from the house boiler to the outside boiler.What i'm infering is don't just read them at the outside boiler,you will get a better understanding of heat loss of the lines only.
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Re: Multi Fuels

PostBy: dchartt On: Sun Jan 26, 2014 1:51 pm

Ill bring one home from work and see what the temps are
Would the heat loss in taking the water to my house be evened out by the heat increase going back to the boiler? Its getting too technical!
dchartt
 
Stoker Coal Boiler: AHS 130
Hand Fed Coal Stove: Glacier Bay

Re: Multi Fuels

PostBy: dchartt On: Sun Jan 26, 2014 5:15 pm

how many of you guys running these coalguns remove the fan assembly during the season to clean out the air chamber that leads to on top of your fire? reason Im asking is because mine was half full of crap when I had mine tore apart yesterday and its definitely something I will be doing from now on during the winter
dchartt
 
Stoker Coal Boiler: AHS 130
Hand Fed Coal Stove: Glacier Bay

Re: Multi Fuels

PostBy: McGiever On: Sun Jan 26, 2014 5:27 pm

dchartt wrote:how many of you guys running these coalguns remove the fan assembly during the season to clean out the air chamber that leads to on top of your fire? reason Im asking is because mine was half full of crap when I had mine tore apart yesterday and its definitely something I will be doing from now on during the winter


Wish you had a picture of that...pictures is worth a 1000 words. ;)
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Multi Fuels

PostBy: McGiever On: Sun Jan 26, 2014 5:32 pm

How did you insulate the outside of the sch 40 pipe?
How was that insulation then protected from the earth pressure/weight being at 4-1/2' buried depth?

Not so sure you would have a visible snow melt line showing due to pex being so deep buried.
McGiever
 
Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hot Air Coal Stoker Stove: HARMAN MAGNUM
Hand Fed Coal Stove: RADIANT HOME AIR BLAST
Baseburners & Antiques: OUR GLENWOOD 111 BASEBURNER "1908"
Coal Size/Type: PEA / ANTHRACITE, NUT-STOVE / ANTHRACITE
Other Heating: Ground Source Heat Pump
Stove/Furnace Make: Hydro Heat /Mega Tek

Re: Multi Fuels

PostBy: Dennis On: Sun Jan 26, 2014 6:36 pm

McGiever wrote:How did you insulate the outside of the sch 40 pipe?
How was that insulation then protected from the earth pressure/weight being at 4-1/2' buried depth?

Not so sure you would have a visible snow melt line showing due to pex being so deep buried.


what type of insulatoin did you use,fiberglass,open/closed cell.?
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Re: Multi Fuels

PostBy: dchartt On: Sun Jan 26, 2014 6:56 pm

closed cell pipe insulation, my theory was the deeper I buried it the more insulation the earth itself would provide, didnt make sense to bury it within the frost line
dchartt
 
Stoker Coal Boiler: AHS 130
Hand Fed Coal Stove: Glacier Bay

Re: Multi Fuels

PostBy: waldo lemieux On: Sun Jan 26, 2014 8:25 pm

Lightning wrote:Rob R. wrote:If the pex lines are uninsulated in a single piece of PVC, won't the heat try to transfer from the supply to return? Not sure how much...depends how tight the lines are to one another.


Two pex lines in a single pvc conduit would exibit little exchange , UNLESS said conduit wasnt glued together to above ground levels. If not you would have a water filled conduit and a great heat exchanger. Same goes for a gravel /sand filled trench in clay (non draining)soils :idea:
waldo lemieux
 
Stove/Furnace Make: efm
Stove/Furnace Model: s-20