Central Boiler FORGE 3500 Outdoor Coal Boiler

 
User avatar
Lightning
Site Moderator
Posts: 14659
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Fri. Dec. 21, 2018 12:54 pm

Yes is does. It's in the Reaction Chamber column. You can see in the graph that the fire gradually becomes more efficient with its use of oxygen. It's the only explanation since the BTU load does not change. Notice the water temp sloping upward while it's idling. It's going to hit 200 and shut off the combustion air in probably another hour or so.

Attachments

Screenshot_20181221-125108.png
.PNG | 497.6KB | Screenshot_20181221-125108.png


 
User avatar
hotblast1357
Member
Posts: 5657
Joined: Mon. Mar. 10, 2014 10:06 pm
Location: Peasleeville NY
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: air source heat pump, oil furnace

Post by hotblast1357 » Fri. Dec. 21, 2018 12:59 pm

The btu load does change...

If it’s 50 outside vs 0 outside, the latter is colder air passing through the baseboard or whatever is in the loop.

 
User avatar
Lightning
Site Moderator
Posts: 14659
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Fri. Dec. 21, 2018 2:37 pm

hotblast1357 wrote:
Fri. Dec. 21, 2018 12:59 pm
The btu load does change...

If it’s 50 outside vs 0 outside, the latter is colder air passing through the baseboard or whatever is in the loop.
The air passing thru the baseboard is in the house. It's always between 60-65 degrees. :what:

 
User avatar
Lightning
Site Moderator
Posts: 14659
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Fri. Dec. 21, 2018 2:45 pm

Well maybe it gets down to 58 in the house when it's really cold out. It depends also if there are warm bodies home using lights, computers, tv's ECT lol

 
User avatar
hotblast1357
Member
Posts: 5657
Joined: Mon. Mar. 10, 2014 10:06 pm
Location: Peasleeville NY
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: air source heat pump, oil furnace

Post by hotblast1357 » Fri. Dec. 21, 2018 2:53 pm

If the temp never changes inside you wouldn’t need a source of heat..

 
User avatar
Lightning
Site Moderator
Posts: 14659
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Fri. Dec. 21, 2018 3:08 pm

So, how much of a BTU load change with 60 degree air convecting thru the baseboard vs 65 degree air?

Where's Larry? lol :)

 
User avatar
hotblast1357
Member
Posts: 5657
Joined: Mon. Mar. 10, 2014 10:06 pm
Location: Peasleeville NY
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: air source heat pump, oil furnace

Post by hotblast1357 » Fri. Dec. 21, 2018 3:21 pm

What I’m saying is, depending on the heat loss of the house, it’s going to have cooler air going through them.

Or does it just have more air going through them?

Something has to change because a house needs more BTU’s when it’s 0 outside than when it’s 50 outside.


 
User avatar
lsayre
Member
Posts: 21781
Joined: Wed. Nov. 23, 2005 9:17 pm
Location: Ohio
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75

Post by lsayre » Fri. Dec. 21, 2018 4:01 pm

Typically about 3-1/3% more heat energy (BTU) is required for each additional HDD to be overcome. But that is for systems that can keep up. For systems that can't keep up the HDD's are not being overcome and instead with each additional HDD experienced the house simply gets colder by one degree. For the latter case a steady state rate of energy demand is what is experienced.
Last edited by lsayre on Sat. Dec. 22, 2018 6:13 am, edited 1 time in total.

 
User avatar
hotblast1357
Member
Posts: 5657
Joined: Mon. Mar. 10, 2014 10:06 pm
Location: Peasleeville NY
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: air source heat pump, oil furnace

Post by hotblast1357 » Fri. Dec. 21, 2018 4:29 pm

So it all depends at what outside air temp does the system begin to fall short at, below that, yes nothing changes, but above it, it’s all dependent on temp change.

 
User avatar
Lightning
Site Moderator
Posts: 14659
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Fri. Dec. 21, 2018 4:48 pm

Imagine your house being heated by an electric heater that is just on constantly. The BTU output doesn't change. Same deal with this situation.

 
User avatar
hotblast1357
Member
Posts: 5657
Joined: Mon. Mar. 10, 2014 10:06 pm
Location: Peasleeville NY
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: air source heat pump, oil furnace

Post by hotblast1357 » Fri. Dec. 21, 2018 6:06 pm

I don’t think this discussion will solve anything with this setup.

Is he ever going to fix anything or?

 
User avatar
Lightning
Site Moderator
Posts: 14659
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Fri. Dec. 21, 2018 6:10 pm

He's just making due with what he's got. He plans on making it better, soon.

 
User avatar
hotblast1357
Member
Posts: 5657
Joined: Mon. Mar. 10, 2014 10:06 pm
Location: Peasleeville NY
Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: air source heat pump, oil furnace

Post by hotblast1357 » Fri. Dec. 21, 2018 6:41 pm

The hi temp cut off needs to be raised to like 210-215.

 
User avatar
Lightning
Site Moderator
Posts: 14659
Joined: Wed. Nov. 16, 2011 9:51 am
Location: Olean, NY
Stoker Coal Boiler: Modified AA 130
Coal Size/Type: Pea Size - Anthracite

Post by Lightning » Fri. Dec. 21, 2018 6:55 pm

hotblast1357 wrote:
Fri. Dec. 21, 2018 6:41 pm
The hi temp cut off needs to be raised to like 210-215.
I don't think it can be raised. It's an open system, no pressure. It'll boil at around 208 degrees due to altitude.

 
User avatar
lsayre
Member
Posts: 21781
Joined: Wed. Nov. 23, 2005 9:17 pm
Location: Ohio
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75

Post by lsayre » Fri. Dec. 21, 2018 7:47 pm

Lightning wrote:
Fri. Dec. 21, 2018 6:55 pm
I don't think it can be raised. It's an open system, no pressure. It'll boil at around 208 degrees due to altitude.
Or perhaps as low as 205 degrees whenever a low pressure front moves through.


Post Reply

Return to “Hand Fired Coal Boilers Using Anthracite”