MPD location

MPD location

PostBy: ddahlgren On: Sun Mar 09, 2014 3:06 pm

I in no way dispute their need and usefulness but a question on location. Everything I have read mentions something like between 12 and 18 inches from the stove outlet. Why not 5 feet and gain a lot of heat exchanger area?
ddahlgren
 
Hand Fed Coal Stove: Crane 404

Re: MPD location

PostBy: Lightning On: Sun Mar 09, 2014 3:07 pm

I agree, why not?
Be careful its not a fire hazard.
Is the pipe much cooler after a MPD?
I agree it would be after a barometric..
Last edited by Lightning on Sun Mar 09, 2014 3:09 pm, edited 1 time in total.
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: MPD location

PostBy: freetown fred On: Sun Mar 09, 2014 3:08 pm

That'll work just fine also if you're comfortable with it--no safety issues involved there, just preference :)
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Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

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Re: MPD location

PostBy: ddahlgren On: Sun Mar 09, 2014 3:54 pm

My reasoning is based on the fact a base burner has a longer flue path as one of it's benefits why not think along the same lines and while can not add as much you can add some to recover more heat. It is what we are trying to do heat a space.
ddahlgren
 
Hand Fed Coal Stove: Crane 404

Re: MPD location

PostBy: freetown fred On: Sun Mar 09, 2014 4:02 pm

Do it--if it works well, your reasoning is correct, if it don't work well, your reasoning was a tad off ;)
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: MPD location

PostBy: ddahlgren On: Sun Mar 09, 2014 4:29 pm

freetown fred wrote:Do it--if it works well, your reasoning is correct, if it don't work well, your reasoning was a tad off ;)


I am doing the install this spring hopefully in time to try a burn before next heating season so I can fix it if need be before I need it. Maybe install two one close and one farther away so I can test which works best?
ddahlgren
 
Hand Fed Coal Stove: Crane 404

Re: MPD location

PostBy: freetown fred On: Sun Mar 09, 2014 5:22 pm

Sounds like a winner all round. Personally, I don't think you'll find any difference, but make sure you post your results.
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: MPD location

PostBy: Sunny Boy On: Sun Mar 09, 2014 6:44 pm

ddahlgren wrote:My reasoning is based on the fact a base burner has a longer flue path as one of it's benefits why not think along the same lines and while can not add as much you can add some to recover more heat. It is what we are trying to do heat a space.


Sound reason and it works. Even my kitchen range with it's long indirect flue paths, and more heat radiating surface area then a base heater, doesn't have any problem with the MPD 3 feet from the stove.

To gain heat radiating area, I put the MPD up as high as possible. It's 36 inches above the range pipe collar. And there is a substantial heat difference below and above the MPD when it's close to, or fully closed.

I would have put the MPD even higher, but then , like Fred mentioned - safety. My girl friend couldn't reach it safely if it was any higher. If it was, she might accidentally lean on the hottest end of the stove top.

Paul
Sunny Boy
 
Hand Fed Coal Boiler: Anthracite Industrial, domestic hot water heater
Baseburners & Antiques: Glenwood range 208, # 6 base heater, 2 Modern Oak 118.
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Re: MPD location

PostBy: michaelanthony On: Sun Mar 09, 2014 7:28 pm

As long as you get the desired flue pipe temp. warm enough to keep the necessary draft the mpd placement is secondary, remember there are no free btu's.
michaelanthony
 
Hand Fed Coal Stove: Vigilant 2310, gold marc box, vogelzang pot belly coat rack
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Re: MPD location

PostBy: scalabro On: Sun Mar 09, 2014 8:06 pm

I wonder if any rocket scientists have tried a MPD at the flue outlet on top of the chimney?

:doh:
scalabro
 
Baseburners & Antiques: Crawford 40, PP Stewart No. 14 in the works.
Coal Size/Type: Stove, Anthracite
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Re: MPD location

PostBy: freetown fred On: Sun Mar 09, 2014 8:16 pm

Alright--where the hell is Larry???????????????????????????
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: MPD location

PostBy: dlj On: Sun Mar 09, 2014 8:24 pm

I don't think it makes much difference. I think the main concern is ease of use. You should have it where you can reach it easily while attending your stove. I like it handy to the valve on my base burner. So mine is about 8 inches from the valve on my stove. I can work both easily.

dj
dlj
 
Hand Fed Coal Stove: Vermont Castings Resolute
Baseburners & Antiques: Glenwood Baseheater #6
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Re: MPD location

PostBy: Lightning On: Sun Mar 09, 2014 8:51 pm

Gekko wrote:I wonder if any rocket scientists have tried a MPD at the flue outlet on top of the chimney?

:doh:


Seems like I remember someone blocking part of the top of the chimney purposely to reduce the opening size because the draft was too strong.. Hmmm who was that?...
Lightning
 
Hand Fed Coal Furnace: Clayton 1537G
Coal Size/Type: Nut/Stove Size Mix

Re: MPD location

PostBy: scalabro On: Sun Mar 09, 2014 8:54 pm

Lightning wrote:
Gekko wrote:I wonder if any rocket scientists have tried a MPD at the flue outlet on top of the chimney?

:doh:


Seems like I remember someone blocking part of the top of the chimney purposely to reduce the opening size because the draft was too strong.. Hmmm who was that?...


???
scalabro
 
Baseburners & Antiques: Crawford 40, PP Stewart No. 14 in the works.
Coal Size/Type: Stove, Anthracite
Other Heating: Oil fired forced hot air

Re: MPD location

PostBy: KingCoal On: Sun Mar 09, 2014 9:48 pm

i did both, i took off the cap and registered the result AND put a reducer on top and logged that result also.

i did not however use an MPD up there as that would have meant multiple trips up across the roof to check at 22.5 * intervals.
KingCoal
 
Hand Fed Coal Stove: DSM 1400, Riteway # 37, Comforter Stove Works
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