It's going to be a long summer

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lsayre
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Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Sat. Jun. 29, 2019 1:34 pm

David... wrote:
Sat. Jun. 29, 2019 12:06 pm
157000 btu's per day seems like a lot for only domestic hot water.

David

My house is all electric. ~225 KWH/Month for DHW for the two of us. The difference in price isn't all that great between 13 lbs. of coal and 7.4 KWH of electricity per day. I'm losing about $0.55 per day by burning coal instead of using electricity for DHW, but a 60 watt bulb 24/7 in the boiler over the summer to keep it from rusting out would cost me about $0.21 per day, so I'm actually only losing about $0.34 per day for the 150 days a year that we are not heating the house. ~$51 for the entire 150 day span.

~10 of the 13 lbs are required merely to keep the fire burning. The other ~3 lbs are for DHW.

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lsayre
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Posts: 16822
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Tue. Jul. 09, 2019 3:00 pm

Continual incremental lowering of the ashing initiation temperature has led to continually increasing amounts of partially to fully unburned coal in the ash tub, so now I'm finally trying the opposite direction. Presently at 115 degrees, and contemplating a switch to 120 degrees. 2 degrees of hysteresis. Before the reversal I had it down to 100 degrees at one point.

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McGiever
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Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: RICE,PEA,NUT,STOVE /ANTHRACITE and EGG / BIT
Other Heating: Ground Source Heat Pump and some Solar
Location: Junction of PA-OH-WV

Post By: McGiever » Tue. Jul. 09, 2019 11:58 pm

Yup...it's going to be a long summer.

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Scottscoaled
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Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
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Coal Size/Type: Lots of buck
Other Heating: Slant Fin electric boiler backup
Location: Malta N.Y.

Post By: Scottscoaled » Wed. Jul. 10, 2019 4:31 am

Yep, maybe the longest summer ever recorded.

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lsayre
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Posts: 16822
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Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Wed. Jul. 10, 2019 5:15 am

My last ash tub was so heavy that it took both my wife and I to carry it. 17 gallons, and full nearly to the brim. Loads of partially burned coal. At this juncture I'm letting it run out/burn out for a cleaning. Not forcing it to shut down by turning the power off, but rather just letting it run out the hopper on its own. I'm out of coal and still waiting on my new delivery.

Rob R.
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Stoker Coal Boiler: EFM DF520
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Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post By: Rob R. » Wed. Jul. 10, 2019 6:21 am

Good idea. Get it cleaned & serviced. Use alternate means of making DHW until you need heat again.

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McGiever
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Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
Hand Fed Coal Boiler: BUCKET A DAY water heater
Hand Fed Coal Stove: Warm Morning 414A
Coal Size/Type: RICE,PEA,NUT,STOVE /ANTHRACITE and EGG / BIT
Other Heating: Ground Source Heat Pump and some Solar
Location: Junction of PA-OH-WV

Post By: McGiever » Wed. Jul. 10, 2019 6:25 am

Will this be the first time to have let it run completly out of hopper supply coal, either intentional or unintentional?

Might it burn or at least turn the paint brown at hopper neck and possibly trigger the 'overheat safety'.

Would want hopper lid in place for sure.

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lsayre
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Posts: 16822
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Wed. Jul. 10, 2019 8:15 am

McGiever wrote:
Wed. Jul. 10, 2019 6:25 am
Will this be the first time to have let it run completly out of hopper supply coal, either intentional or unintentional?

Might it burn or at least turn the paint brown at hopper neck and possibly trigger the 'overheat safety'.

Would want hopper lid in place for sure.
Every time I do the annual cleaning I let it run itself empty in precisely this fashion. No harm. The paint is still fully intact at the outlet tube of my hopper. The snap disc safety has never come into play.

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lsayre
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Posts: 16822
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Wed. Jul. 10, 2019 8:19 am

McGiever wrote:
Tue. Jul. 09, 2019 11:58 pm
Yup...it's going to be a long summer.
I'm open to suggestions.

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hotblast1357
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Stoker Coal Boiler: 1984 Eshland S260 coal gun
Coal Size/Type: Lehigh anthracite pea
Other Heating: oil furnace
Location: Peasleeville NY

Post By: hotblast1357 » Wed. Jul. 10, 2019 4:30 pm

Larry my Lehigh very rarely “looks” burnt. Especially this time of year. The ash tub 3/4 full can weigh 55-60 pounds. It’s bigger than yours though.

CapeCoaler
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Stoker Coal Boiler: want AA130
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Coal Size/Type: Pea/Nut/Stove
Location: Cape Cod, MA

Post By: CapeCoaler » Thu. Jul. 11, 2019 11:00 am

The hand fed 503 Hitzer always burns up the lehigh...
Have to check the last bucket...
It was burning at like 150*...
for a few weeks...
Can't imagine that if you get the fire just right...
It would not burn up reasonably well...

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lsayre
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Posts: 16822
Joined: Wed. Nov. 23, 2005 9:17 pm
Stoker Coal Boiler: AHS S130 Coal Gun
Coal Size/Type: Lehigh Anthracite Pea
Other Heating: Resistance Boiler (13.5 KW), ComfortMax 75
Location: N/E Ohio, between Medina and Wadsworth

Post By: lsayre » Thu. Jul. 11, 2019 1:46 pm

I just went to 120 degrees on the ashing. Trying to deepen the fire.

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StokerDon
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Stoker Coal Boiler: 1959Axeman Anderson130M, 1991Axeman Anderson130M, BairMatic BMC-500/Van Wert VA400 Stoker, down to 1Van Wert VA-600
Hand Fed Coal Furnace: Harman SF3500 reduced down to 3 grates connected to its own plenum
Coal Size/Type: Rice, Pea, Chestnut and whatever will fit through the door on the Harman
Other Heating: Noth'in but COAL! Well, Maybe a little tiny bit of wood
Location: PA, Southern York County!

Post By: StokerDon » Fri. Jul. 12, 2019 8:30 am

Larry, I have had this same problem this Summer. I have been all over the place with ashing temperature and it didn't help at all. In my case, slowing the ashing down helped some, but lowering the fan speed helped the most.

Currently running 6.9 grate cycles per hour and 1293.75 RPM fan speed. These settings give me some clinkers and ash but I still have partly burn black rocks in there. I was also getting an occasional outfire so I am now running the timer at 1 hour, 3%. I haven't had any problems for a month now.

Keep in mind that we are almost certain that my problem is a very hard batch of coal. The last of that batch is in the barrel now. after that runs out, we will be running Rice coal from the basement. I'm betting the Rice will be better for Summertime running.

-Don

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