Pictures of your stove

Re: Pictures of your stove

PostBy: Highlander On: Sun Feb 03, 2008 11:07 am

Yanche, thank you for your kind words. I would hope that some of the manufacturers out there would rethink their current designs and put some more sophisticated controls into their coal burning products. Harman does this with their line of pellet fired equipment, yet the coal fired stoves and boiler, get the 1980's electronic timer control.

Chris, the PLC I used is one that my company distributes so the choice was fairly easy. There are a multitude of controls on the market that could do the job, their ability to process analog signals is the key. As to my house, the boiler is located in the basement and provides a welcome amount of additional heat there in the winter. In the summer, it gets pretty warm so I open a screen door to let some of the excess heat out. We normally don't run AC in the summer, just an attic fan, but it does add to the heat. I've added insulation under the sheet metal to help with the heat loss, it adds maybe 5 to 10 deg to the average boiler water temperature. All in all a small price to pay for the greatly reduced propane bill.

Kirk, The flex hose with the outside air is a relatively recent addition, I didn't have it during the summer months. I ran with the restrictor plate, maybe half open with the combustion blower running all the time. My chimney draft was about .02" with outdoor temps in the 80's, but I never had coal gas. I did experiment with it open all the way and still had no coal gas smell. The chimney is a double wall insulated SS type. It draws very well in the winter, almost too well, the baro damper swings open quite a bit, but its doing its job. The latest mod was the variable speed control for the combustion blower. When the stoker runs, the blower runs full tilt, when its off, the blower slows down to less than half speed. This should keep a larger bed of coals and reduce the excess air flushing heat out of the boiler while still maintaining the fire during long periods of idle.

This boiler and burning coal has turned into a hobby for me, I look for ways to tweak the operation and controls to maximize the performance and minimize the fuel useage. Some people might think I'm a bit crazy, but I'll bet people here know what I'm talking about.

Bill
Last edited by Highlander on Sun Feb 03, 2008 5:51 pm, edited 1 time in total.
Highlander
 
Stoker Coal Boiler: Harman VF3000 Sold
Hand Fed Coal Stove: Vermont Castings Resolute
Coal Size/Type: Nut
Stove/Furnace Make: Harman
Stove/Furnace Model: VF3000 Stoker Boiler

Re: Pictures of your stove

PostBy: 1975gt750 On: Sun Feb 03, 2008 3:49 pm

i like the idea of the slowing down the combution blower during idle time have you noticed a diffrence in coal usage and stack temp. i have a kaa-2 keystoker boiler and my combution blower runs one speed all the time. i notice at idle my stack temp is 100-150 degrees and at full fire it is 250-300 degrees. do your mumbers relate to mine
1975gt750
 
Stoker Coal Boiler: keystoker kaa-2
Coal Size/Type: rice coal / blaschak
Other Heating: pensotti oil boiler with riello 40 burner
Stove/Furnace Make: keystoker
Stove/Furnace Model: kaa-2

Re: Pictures of your stove

PostBy: Highlander On: Sun Feb 03, 2008 6:12 pm

i like the idea of the slowing down the combution blower during idle time have you noticed a diffrence in coal usage and stack temp. i have a kaa-2 keystoker boiler and my combution blower runs one speed all the time. i notice at idle my stack temp is 100-150 degrees and at full fire it is 250-300 degrees. do your mumbers relate to mine


Chris

Its hard to tell exactly how much the flue temperature drops when the blower cuts back to idle, I'm sure it does, but I haven't measured it between cycles. My cycle time is 7 minutes or 420 seconds total. The on time varies from a low of 30 seconds to a high of 410 seconds. When it idles for a while, the temp drops dramatically, the fire will burn down to a ribbon across the back, maybe an inch or so wide. The exhaust temp is so cool you can stick your hand in it.

The speed control I used was from Lowes, its meant to control a paddle fan or some other small motor but it works fine with the combustion blower on the Harman. If your blower runs all the time, you would probably need to add a relay that is on when the stoker is on. You could then use the contact to bypass the speed control when the unit stokes, and cut back to the idle speed when its not.

Hope this helps

Bill
Highlander
 
Stoker Coal Boiler: Harman VF3000 Sold
Hand Fed Coal Stove: Vermont Castings Resolute
Coal Size/Type: Nut
Stove/Furnace Make: Harman
Stove/Furnace Model: VF3000 Stoker Boiler


Re: Pictures of your stove

PostBy: 1975gt750 On: Sun Feb 03, 2008 9:40 pm

thanks for the info i could wire a spdt relay and it would work just fine. i am just wondering if it is worth it . my timer runs evey 10 minutes for 90 second to maintain the fire. if you could can you posiblly check what your stack temps are with the blower running normally and then with the blower running controlled and see what the diffrence is and let me know i would be curious to know.
1975gt750
 
Stoker Coal Boiler: keystoker kaa-2
Coal Size/Type: rice coal / blaschak
Other Heating: pensotti oil boiler with riello 40 burner
Stove/Furnace Make: keystoker
Stove/Furnace Model: kaa-2

Re: Pictures of your stove

PostBy: Wood'nCoal On: Sun Feb 03, 2008 10:02 pm

Very nice, Highlander!
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: Pictures of your stove

PostBy: coalstoves On: Mon Feb 04, 2008 1:44 am

I truly applaud your work Highlander an actual Smart control.

What do estimate the cost of components for the control and sensor array
coalstoves
 
Stove/Furnace Make: Harman and Liberty
Stove/Furnace Model: Magnum and Victory 700

Re: Pictures of your stove

PostBy: Highlander On: Mon Feb 04, 2008 11:21 pm

Thanks again for all the kind words.
Coalstoves, the PLC and temperature transmitter were demo stock, but I would estimate it at less than $300 for the components. The outside air temp sensor was a Velleman electronics kit, cost about $20 online. It didn't have the higer temp range needed to monitor boiler water, but is fine for ambient air temperature.

Chris, I'm on the road now, but I will try and see if I can measure a difference between the full and partial blower temps when I get back.
Highlander
 
Stoker Coal Boiler: Harman VF3000 Sold
Hand Fed Coal Stove: Vermont Castings Resolute
Coal Size/Type: Nut
Stove/Furnace Make: Harman
Stove/Furnace Model: VF3000 Stoker Boiler

Re: Pictures of your stove

PostBy: Wotseurba On: Thu Feb 07, 2008 3:24 pm

In my case this will be a pictures of my system. Other photos of this project are in the thread "Better Late than Never" in the Stokers section.

A "brief" discription. As can be seen in my avitar, I have a good size house, and a 40 x 60 workshop out back. When I built the shop building, I put in radiant tubes in the concrete for heat, with the heat source to be determined later. I researched most viable boilers, and various fuels. I finally settled on an AHS Coalgun, S-130. I also have an oil fired boiler in the system (not yet ready for use) that will serve as back-up if the coal fire goes cold, if I'm out of town etc. There's an underground pair of insulated pipes leading to the house for integration to my heating system there. I'm using a Tekmar 2 stage boiler control with outdoor reset, it monitors outdoor temp, coal boiler temp, shop room temp, and a few other attributes. If the system temperature falls below a preset value, (i.e coal fire goes out) the oil boiler will take over and keep things going. I used a Tekmar variable speed mixing controller to mix down the boiler temp to the required temp which is then sent through the shop floor tubes. The shop is on priority, which means even if the house were to call for heat, the house will get none, until the shop is satisfied. I have two additional zone take-offs ready to use as needed. I still have a few details to complete for the oil boiler, and some wiring clean-up to do. I started up the S-130 last weekend, with very little effort. The shop was a COLD 34 when starting, burned about 300# of coal as of today just to warm up the 35 yrds of concrete and all of the items inside the shop. Now up to 62 degrees, which is more than warm enough for me. I will now begin tracking coal usage to maintain the temp of the shop. The house integration is still a few weeks away.
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Dual Boiler Setup and Control Board from inside boiler room
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Shop Side Circulator Unit & Manifolds
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Wotseurba
 
Stove/Furnace Make: Alternate Heating Systems
Stove/Furnace Model: S-130

Re: Pictures of your stove

PostBy: coal-cooker On: Sat Feb 23, 2008 6:38 pm

My Crane Coal-cooker, purchased used in 1985 and still going strong.
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Crane Coal-Cooker in my camp basement
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coal-cooker
 
Stove/Furnace Make: Crane/Harman
Stove/Furnace Model: Coal Cooker/Mark II

Re: Pictures of your stove

PostBy: gutts On: Tue Feb 26, 2008 5:26 pm

Anybody know what this is [ha ha] !!
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gutts
 
Stove/Furnace Make: jenson
Stove/Furnace Model: not sure[1981]

Re: Pictures of your stove

PostBy: SJ Coal On: Mon Mar 03, 2008 6:25 pm

Fairly new to the forum, thought I would post a picture of my stove.

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SAEY Hannover I, 14yrs Old
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Believe it or not the stove was free. The chimney was not (ouch!).
SJ Coal
 
Stove/Furnace Make: SAEY
Stove/Furnace Model: Hannover I

Re: Pictures of your stove

PostBy: cheapheat On: Mon Mar 03, 2008 7:38 pm

Very nice tiles you have there SJ. Jim
cheapheat
 
Stove/Furnace Make: Alaska Channing 3
Stove/Furnace Model: Bagging my own rice coal

Re: Pictures of your stove

PostBy: beemerboy On: Mon Mar 17, 2008 3:55 pm

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Second day with the Hannover 1.

When the weather warms up I may repaint it a high temp gray (to match the dust). ;)
beemerboy
 
Stove/Furnace Make: SAEY
Stove/Furnace Model: Hannover 1

Re: Pictures of your stove

PostBy: extreme915 On: Tue Mar 25, 2008 9:04 pm

Here is a pic of my Keystoker Koker, I hooked it up today and I love it already.
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extreme915
 
Stove/Furnace Make: Keystoker Koker

Re: Pictures of your stove

PostBy: coalkirk On: Tue Mar 25, 2008 9:36 pm

I'm curious why you didn't go with a boiler since I see you have hydronic heat?
coalkirk
 
Stoker Coal Boiler: Harman VF3000
Coal Size/Type: antrhcite/rice coal