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

6 posts • Page **1** of **1**

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

as 68.6 percent. I would appreciate

a review of that figure.

thanks

- franpipeman
**Stoker Coal Boiler:**efm 520 stoker fitzgibbons pressure vessel**Hand Fed Coal Stove:**harman, russo**Coal Size/Type:**rice

LARRY!!! This one is for you!!

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!

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.

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!

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.

- titleist1
**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

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

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

- franpipeman
**Stoker Coal Boiler:**efm 520 stoker fitzgibbons pressure vessel**Hand Fed Coal Stove:**harman, russo**Coal Size/Type:**rice

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.

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.

- Rob R.
**Stoker Coal Boiler:**EFM DF520**Hand Fed Coal Stove:**Hitzer 50-93**Other Heating:**Dad's 1953 EFM Highboy

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

- franpipeman
**Stoker Coal Boiler:**efm 520 stoker fitzgibbons pressure vessel**Hand Fed Coal Stove:**harman, russo**Coal Size/Type:**rice

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.

- Rob R.
**Stoker Coal Boiler:**EFM DF520**Hand Fed Coal Stove:**Hitzer 50-93**Other Heating:**Dad's 1953 EFM Highboy

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