The efm 520 stoker boiler has been in production since 1951

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: stoker-man On: Sun May 25, 2008 6:57 am

I think coal berner is referring to the turbulators of the early model boilers, which were used in the vertical tubes. The modern boiler uses a radiator style heat exchanger.

Here are pics of the new baffles.

http://nepacrossroads.com/download/file ... &mode=view

http://nepacrossroads.com/download/file ... &mode=view
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: coal berner On: Sun May 25, 2008 5:29 pm

e.alleg wrote:
coal berner wrote:
stokerscot wrote:No, I have too many now. I'm not really concerned with a couple percent efficiency. When oil was a buck a gallon(seems like yesterday) I wouldn't have changed my 87% oil boiler out with a higher rated appliance. It just didn't pay. Same with coal. At the prices for these machines it isn't a concern to get a couple percent better efficiency. A couple ton more isn't going to break the bank, yet. :) Scott

Your efficiency will not go up or down with them they do Nothing but get in the way when cleaning out the tubes and Collect Flyash it was a design that never worked a waste of metal


I think you might be wrong. The plates serve as a device to keep the intense coal heat from getting sucked out the chimney as fast. All it takes is a simple experiment, check the stack temp without the baffles for a 24 period in the winter and then again with the baffles in place, no other changes. I'll bet the stack is cooler with the baffles in place. No way would EFM continue to put 100 or so extra pounds of expensive steel into the boiler if it wasn't necessary, most customers surely wouldn't complain if they were omitted. As far as removing them for cleaning, how often does it need to be cleaned out, once every year at the most? I'd leave them in as EFM designed.

Ed we are not talking about the baffle plates we are talking about the spiral Pieces of metal that went in the older tube boilers that EFM made They where to act like a heat sinker to help keep the heat in the tubes longer they really did not do anything but get in the way when you where cleaning the tubes out you had to take them out most people don't even know about them and the ones that did took them out
Last edited by coal berner on Tue May 27, 2008 2:26 am, edited 1 time in total.
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: coal berner On: Sun May 25, 2008 5:34 pm

stoker-man wrote:I think coal berner is referring to the turbulators of the early model boilers, which were used in the vertical tubes. The modern boiler uses a radiator style heat exchanger.

Here are pics of the new baffles.

http://nepacrossroads.com/download/file ... &mode=view

http://nepacrossroads.com/download/file ... &mode=view

Thanks Chris for the correct name Tubulators ;) I always forget the correct name for them
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: stoker-man On: Sun May 25, 2008 8:51 pm

What turbulators do is slow down the super-heated air passing through the tubes, so more hot air is transferred to the tube wall and the water around it. That's how you start with 2000 degree heat and come out the other end at 300 degrees.

They play an important roll in oil fired systems and they do get sooted up, just like a stoker tube would get ashed up. They are removed to clean the tubes and re-installed. If the stack temperature is too low, some people will remove two of the turbulators to bring it up to 350 degrees.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: coalcrazy On: Mon May 26, 2008 6:05 am

my aunt is wants to buy the efm 520 ( oil heat costs 6000.00 a year) how much does this unit cost on average. thanks
coalcrazy
 
Stove/Furnace Make: us stove
Stove/Furnace Model: clayton 1800 wood/coal furnace

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: stoker-man On: Mon May 26, 2008 6:45 am

At that usage, you will get a total payback of your investment in an efm coal boiler in 3-5 years. Check your PM.
stoker-man
 
Hand Fed Coal Boiler: 1981 efm wcb-24 in use 365 days a year
Coal Size/Type: Anthracite/Chestnut
Other Heating: Hearthstone wood stove

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: e.alleg On: Tue May 27, 2008 12:59 am

Sorry coal berner I thought you were talking about the baffles on the newer boilers. Thats what I get for posting after midnight when I get up at 5am.
e.alleg
 
Stove/Furnace Make: EFM
Stove/Furnace Model: 520

Re: The efm 520 stoker boiler has been in production since 1951

PostBy: coal berner On: Tue May 27, 2008 2:33 am

e.alleg wrote:Sorry coal berner I thought you were talking about the baffles on the newer boilers. Thats what I get for posting after midnight when I get up at 5am.
No need for apology Ed. We all have screw up's we are only human ;)
coal berner
 
Stoker Coal Boiler: 1986 Electric Furnace Man 520 DF
Stove/Furnace Make: Electric Furnace Man
Stove/Furnace Model: DF520