520 Fuel Usage Energy Efficiency

Stoker Coal Boilers automatically feed the coal and have controls and pumps just like any conventions boiler. They are intended to be used as a primary heat and often have domestic hot water coils as an added bonus. They can be set up independently or in dual sytem with your existing oil/gas boiler. They can accommodate both hot water base board or steam plumbing.
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franpipeman
Member
Posts: 203
Joined: Fri. Jan. 11, 2008 4:27 pm
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice
Other Heating: alpine propane condensing boiler radiant floor
Location: Wernersville pa

Post Sun. Jan. 05, 2014 8:52 am

First I like coal heat, secondly we all like the price, but I have done a simple calc for 520 and I have determined at best, its fuel efficiency
as 68.6 percent. I would appreciate
a review of that figure.
thanks

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titleist1
Member
Posts: 4404
Joined: Wed. Nov. 14, 2007 4:06 pm
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite
Location: Cecil County, MD

Post Sun. Jan. 05, 2014 9:04 am

LARRY!!! This one is for you!! :D

Well, my review of that 68.6 figure....
I see all the numbers are even and there is a decimal point in there! And it would be a great scoring average in golf!
Sorry I couldn't resist! :oops:

Don't worry, some of the number crunchers will be along shortly. I was up in your area this past summer to play golf at Galen Hall....very hilly place.
I drive a VW TDI, heat my home & workshop with two coal stokers and have two vintage JD diesel tractors....
The EPA just loves me!!

User avatar
franpipeman
Member
Posts: 203
Joined: Fri. Jan. 11, 2008 4:27 pm
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice
Other Heating: alpine propane condensing boiler radiant floor
Location: Wernersville pa

Post Sun. Jan. 05, 2014 9:20 am

yes Indeed very hilly and very windy elevation is 1010 above sea level Not far from the coal fields about 40 minutes but many mom and pops sell coal around here.
And while were talking about heat and energy not many people likely walk the galen hall golf course as it would generate too much heat for the human machine

Visit Alternate Heating Sytems

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Rob R.
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Posts: 11348
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Sun. Jan. 05, 2014 9:58 am

It is tough to review your figure if you haven't told us your logic or calculations.

What did you calculate for the efficiency of your previous system?

I have never tried to calculate efficiency numbers, but I can say that the rule of 180 gallons of fuel oil to 1 ton of anthracite has been very close to what I have observed.

User avatar
franpipeman
Member
Posts: 203
Joined: Fri. Jan. 11, 2008 4:27 pm
Stoker Coal Boiler: efm 520 stoker fitzgibbons pressure vessel
Hand Fed Coal Stove: harman, russo
Coal Size/Type: rice
Other Heating: alpine propane condensing boiler radiant floor
Location: Wernersville pa

Post Sun. Jan. 05, 2014 10:20 am

as I review my figures its less than 68.6 . I used one bound of anthracite has 12.500 BTU per pound. The manual for 10 pounds is four clicks is gross out put of 85,700. with net out put at 74,600 for water . That being said it will be less than 68.6 percent as I used gross output for 68 percent figure

User avatar
Rob R.
Site Moderator
Posts: 11348
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Sun. Jan. 05, 2014 12:38 pm

We do not know what btu/lb figure EFM used, but I was told it was conservative to allow for less than ideal anthracite. I would guess that 11,000 btus/lb is probably in the ballpark. The difference between the gross and net ratings is due to a 15% pickup factor. If you look at the specs for an oil boiler you will see something similar.

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