Coal fired pool heater

Coal fired pool heater

PostBy: blue83camaro On: Sat Sep 15, 2007 12:46 am

I am building a coal fired pool heater. I have the heat exchanger and the shaker grate built. Hopefully this weekend I will get the refractory cement in the fire chamber. Then I have to build the base with the ash pan and blower. I will post picks as soon as it is finished. I tested the heat exchanger with wood and it worked good but adding wood every 15 min gets old fast not to mention the creasote build up on the exchanger. The heat exchanger is made from 11 runs of 5/16 copper tubing connected to 1 inch copper manifolds.
blue83camaro
 
Stove/Furnace Make: Us Stove
Stove/Furnace Model: 1600G

PostBy: cheapheat On: Sun Sep 16, 2007 11:05 am

Hey blue I am looking forward to seeing those pics
cheapheat
 
Stove/Furnace Make: Alaska Channing 3
Stove/Furnace Model: Bagging my own rice coal

PostBy: blue83camaro On: Sun Sep 16, 2007 7:53 pm

a few pics of my progress. The fire chamber is one you are looking down into at the shaker grates. It will have a 1.5 inch thick cast refractory wall. The can below will hold the ashes and the blower. On top of the fire chamber will sit another can containing the heat exchanger but it will only be about 8 inches tall. I will refine the whole system if it works good.
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heat exchanger 1.JPG
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75 ft of 5/16 copper tubing
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shaker grate.jpg
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the gap between grate and outer can will be filled with refractory cement all the way to the top. I will use a form after the shaker grate.
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pool heater.jpg
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blue83camaro
 
Stove/Furnace Make: Us Stove
Stove/Furnace Model: 1600G


Re: Coal fired pool heater

PostBy: EarthWindandFire On: Tue May 31, 2011 3:36 pm

I have been reading about and researching coal-fired water heaters for my pool.

Here's a good link, albeit wood-fired, but the site gives some useful information.

http://www.woodstovepools.com/WSP-PROFILE.html
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75.
Other Heating: Oil and Natural Gas.

Re: Coal fired pool heater

PostBy: 2001Sierra On: Tue May 31, 2011 9:21 pm

How about a Stoker Pool heater for us "girly" aka older coal burners. Just remember we have been there and done that and maybe "Earned" the stoker right for our older coal burning bones :P :P
2001Sierra
 
Hot Air Coal Stoker Stove: Keystoker 90 Chimney vent
Coal Size/Type: Rice
Other Heating: Buderus Oil Boiler 3115-34
Stove/Furnace Model: Keystoker 90 Chimney Vent

Re: Coal fired pool heater

PostBy: Rob R. On: Tue May 31, 2011 10:02 pm

My EFM is heating the pool right now...80 degrees currently. :D
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Coal fired pool heater

PostBy: freetown fred On: Tue May 31, 2011 10:39 pm

80 degrees???? are you takin a bath or swimmin---the old swimming hole down at the creek is about 60*--I think my willy got sucked up towards my adams :oops2: :clap: toothy
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Coal fired pool heater

PostBy: EarthWindandFire On: Wed Jun 01, 2011 8:40 am

I would never, ever, use a wood-fired pool heater!

I guess I posted the wood-fired heater link as an example of what could be made using a coal-fired stoker.
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75.
Other Heating: Oil and Natural Gas.

Re: Coal fired pool heater

PostBy: EarthWindandFire On: Tue Jun 21, 2011 9:43 am

I am posting this for future reference:

The goal is to have a heater that has enough capacity to heat the pool to your desired level in a reasonable amount of time. Maintaining that temperature is a lot easier once the pool is up to temp.

First, the capacity of most pool heaters are rated in BTU's or British Thermal Units. One BTU is the amount of heat required to raise the temperature of one pound of water, one degree F. And since there are 8.33 gallons of water per pound, it takes 8.33 BTU's to raise one gallon of water, one degree F.

Now let's calculate:

1. Determine the number of gallons in your pool (G).

2. Determine the amount in temperature that you want to raise the pool temp (the easiest way to figure this is to use the air temp as the minimum and the desired pool temp as the maximum) (Delta T).

3. Calculate the number of BTU's needed (BTU) per gallon of water by multiplying step 2 x 8.33. Multiply this number times the gallons of water in your pool (G). This is the number of BTU's to raise your pool temp from the minimum to desired temp.

4. Determine how FAST you want to be able to go from the minimum temp to the desired temp (in hours) (H).

5. Divide the total number of BTU's from step 3 by the hours in step 4 to yield the BTU'S per hour that your heater will need to deliver.

6. Multiply Step 5 by a error factor of 20% and add to step 5. This is approximately the size of heater that you will need.

Example:

1. Assume pool volume, G = 10,000 gallons 2. Assume 80F desired pool temp and 60F air temp. Delta T = 80 - 60 = 20F 3. BTU's per gallon x Delta T: 8.33 x 20 = 166.6 BTU's per gallon. BTU/Gal x Gallons (G): 166.6 x 10,000 gal = 1,666,000 Total BTU's. (Wow, seems like a lot!) 4. Assume I want to be able to warm the pool in two days of continuous operation = 48 hours. 5. Total BTUs / Hours: 1,666,000 / 48 = 34,708 BTU's per hour. 6. (BTU/Hr x 20%) + BTU/Hr: 34,708 x 0.20 = 6,941 BTU's 6,941 + 34,708 = 41,649 BTU's per hour.

Now, most pool heaters come in a round number of BTU's like 50,000, 100,000, 150,000, etc. You should select the closest size to your needs (usually on the higher side is best).

Hence, for this example, a 50,000 BTU heater would be more than adequate.

Obviously, you could also work these calculations backward to determine what Delta T you could handle given a certain size heater and pool size.
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75.
Other Heating: Oil and Natural Gas.

Re: Coal fired pool heater

PostBy: AA130FIREMAN On: Tue Jun 21, 2011 3:36 pm

Don't you know the easiest way to heat the pool is go to your local jenny craig and post a pool party poster, when they arive dump a box of twinkies in the pool and all that excess blubber will warm the pool in no time flat. :lol:
AA130FIREMAN
 
Stove/Furnace Make: axeman anderson
Stove/Furnace Model: 130 anthratube

Re: Coal fired pool heater

PostBy: Rob R. On: Tue Jun 21, 2011 3:37 pm

That might work, but the pool would be half empty when they all got out.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Coal fired pool heater

PostBy: EarthWindandFire On: Tue Jun 28, 2011 7:03 pm

If I had a dedicated boiler for just heating the pool, would any boiler work well or the smaller the better?

And, being the summertime, a boiler would have a hard time staying lit in summer temps.

The load would be 35,000 to 50,000 btu's at most. Any boilers that small or would another method work better?

This would also be a chlorine free pool using an ozone generator instead of the harsh chlorine.
EarthWindandFire
 
Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Hand Fed Coal Stove: Hitzer model 75.
Other Heating: Oil and Natural Gas.

Re: Coal fired pool heater

PostBy: coaledsweat On: Tue Jun 28, 2011 7:26 pm

EarthWindandFire wrote:This would also be a chlorine free pool using an ozone generator instead of the harsh chlorine.

Ozone is corrosive too.
coaledsweat
 
Stoker Coal Boiler: Axeman Anderson 260M
Coal Size/Type: Pea

Re: Coal fired pool heater

PostBy: cabinover On: Thu Jun 30, 2011 5:06 am

I used my AA and a SS heat exchanger. Was the best week we've spent in the pool last summer. Haven't gotten around to plumbing it again this year, just not enough time.
cabinover
 
Stoker Coal Boiler: Hybrid Axeman Anderson 130
Baseburners & Antiques: Sparkle #12
Coal Size/Type: Pea, Buckwheat, Nut
Other Heating: LP Hot air. WA TX for coal use.

Re: Coal fired pool heater

PostBy: Scottscoaled On: Thu Jun 30, 2011 9:40 pm

C'mon Bob! No midnight swims for you! ;)
Scottscoaled
 
Stoker Coal Boiler: EFM 520x3, 700 Van Wert 800
Hot Air Coal Stoker Furnace: EFM 150, Keystoker 150
Coal Size/Type: Lots of buck