Ait temperature (convection blower)

[DannMarr]

Can we post the air temperature our stoves/inserts are pushing out and what pellets are used?

 

[little_hawk_59]

145 on feed speed three and convection on 6

 

[nailed_nailer]

I have an Enviro EF-2 Freestanding. OAK and venting straight out the back to the "t" then vertical 12' up.

Adjusting my fuel feed dial to about the 2 O'clock position (about 3/4 feed rate)
And having my conbustion damper set so the unburned pellets are just dancing in the box.
My convection blower is set to about the 10 O'clock position also about 3/4 speed. Any higher and the blower gets too loud.

I used a Fluke 189 Multimeter with a Type K thermocouple.
Thermocouple came from Grainger and looks like this
(broken link removed)

//////Pellets///////

New England's (Tan bag Red Letters, 2009 Jaffery Plant)
Heat exchanger air temp is 150-170 deg F

Okanagans Clear bag from BJ's this year
Heat exchanger air temp is 170-190 deg F

I am running the fuel feed rate at about max.
If I push the feed rate up any higher the safety sensor kicks in and the convection blower kicks up to highest speed to cool the stove.

The Okies are much Hotter by about 20 degrees.

With a strong North East wind blowing (NNE 20+MPH) on the house and outside temps ~20 Deg F.
The in house room temps tells it all.
68-72 with the NEWP
70-76 with the Okies

---Nailer---

 

[New Hampshire Jim]

Rocky Mountains

 

[jamesdjs]

Rocky Mountains

From the readings I've taken the temperature can vary greatly depending where you take the reading from.
I'm using an Omega digital display with thermocouple type K and if I put the probe into the heat exchanger tube the temps can be as high as 500 F.
If I place the probe one inch away from the heat exchanger tubes my temp comes down to 265 F.
This is when the stove is running at the highest feed rate. My stove is connected to the thermostat and when it set this way runs either full out or when at temp slow back to a very low feed.
In order to make any sense of the temp readings a consensus has to be made as to the best way to take readings.
Do we put the probe into the heat exchanger and how far in? Or
Do we place the probe a certain distance away from the heat exchanger and do we take the readings from the center or the left or right sides?
I found the center is hotter then the sides.
I'm burning LGs on a St Croix Pepin stove.

 

[DannMarr]

190 degrees sounds low. Using an IR thermometer I get between 300- 379 on high with Barefoot pellets. That is taking the temp reading right inside the tubes.

 

[nailed_nailer]

190 degrees sounds low. Using an IR thermometer I get between 300- 379 on high with Barefoot pellets. That is taking the temp reading right inside the tubes.

DannMarr

Not saying your measurement method is wrong...just different from mine. Both provide a metric to the answer.

I believe your IR pyrometer measures surface temp of the steel that makes up the heat exchanger (I could be wrong). I don't believe you are measuring air temp. I have also found that when using them, the laser dot (if that is what you have) is subject to reflections. IOW, the more shine off the surface, the less accurate the result.

The convection air passing over that steel (in the tubes) will be significantly less heated than the steel itself due to air being a poor conductor of heat and it is moving. Mr Science ( or someone with a good thermodynamic degree could probably let us all know the principles of boyle's law and how movement affects temp etc...)

The Type K thermocouple I am using measures discharge air temp at the output of the heat exchanger (if it is not touching the steel). Mine is positioned just inside the front grill 2" to the right of center, not touching steel or brass.

I agree we should all come to a consensus on proper placement of the probe sensor to get a good idea of how our units/ pellets are comparing. Or explain how and where we are taking our measurements from.

Or if we use a IR pyrometer where to actually measure from (heat exchanger tube, trim grate/grill, baffle, etc.) As well as where across the front of the stove (left, right, middle, top, bottom, etc...)

I'm not saying I am doing it right. But, I would like to see us all agree on a plan.

---Nailer---

 

[BDPVT]

Can we post the air temperature our stoves/inserts are pushing out and what pellets are used?

I apologize in advance for being so cynical, but what is the point of this. There are so many variables to consider that any meaningful comparison between stoves is pretty much impossible in my opinion. On the other hand, I have seen some good controlled tests that some have done comparing pellets and stove settings on their stoves with worthwhile data. Sorry, but I am a research scientist and poor experiments drive me crazy. Can't help it.

 

[poconoman]

We can't all be "research scientist". Some of us are going to use, what's available.

 

[BDPVT]

We can't all be "research scientist". Some of us are going to use, what's available.

It's not a question of how you go about collecting data, use whatever method works for you. But how can you compare random samplings from different stoves to your own results? It seems most pellet users are "scientists" in one way or another and enjoy experimenting with their stoves. There are tons of useful info on this forum as a result of those experiments. I just don't believe this thread is going to be useful.

 

[jamesdjs]

We can't all be "research scientist". Some of us are going to use, what's available.

It's not a question of how you go about collecting data, use whatever method works for you. But how can you compare random samplings from different stoves to your own results? It seems most pellet users are "scientists" in one way or another and enjoy experimenting with their stoves. There are tons of useful info on this forum as a result of those experiments. I just don't believe this thread is going to be useful.

I agree to a point. Any thread that tries to understand what is happening is good.
Unless the data is meaningful it doesn't do anybody any good.

 

[poconoman]

We can't all be "research scientist". Some of us are going to use, what's available.

It's not a question of how you go about collecting data, use whatever method works for you. But how can you compare random samplings from different stoves to your own results? It seems most pellet users are "scientists" in one way or another and enjoy experimenting with their stoves. There are tons of useful info on this forum as a result of those experiments. I just don't believe this thread is going to be useful.

We can't be all as perfect as you. Since you're this scientist, do some experimenting and show us what YOU have.

 

[jtakeman]

AWF 240°F
X=Okies 262ºF
Y=Barefoot 265ºF
Bayou 223ºF
Curran 228°F
Eco- Flames 232°F
Fireside 228ºF
Green Team 248°F
Greenway 234°F
Inferno 185ºF
Instant Heat 224ºF
Lignetics 250ºF
Maine Choice 228ºF
Maine Wds 224°F
Marth 247ºF
Michigan 232ºF
Penningtons 227ºF
Presto Logs 225ºF
Rocky Mtn 235ºF
Somerset 251°F
Tidy Timbers 229ºF

Sorry I get a little carried away with my test's sometimes. These are all averages. More to come!
jay

Edit: Stove set on medium heat range. Air temp from heat exchanger. I just like to measure the heated air temps. My probe does not touch the stove surface.

 

[Topshelf]

So far in my short "pellet burning career" I have taken temps of anywhere from 245 to 300 using a cheap digital oven thermometer with the probe mounted by alligator clip in the center of my stove's room exhaust NOT touching steel. These are the variables I have tried to get the most heat out my multi fuel stove.

1 Pelletpro's, Auger set at 5, blower set at 8, Bottom buttons set at 3-4-1, Temp ranges from 245 - 290.

2 Maeder Bros, Auger set at 5, blower set at 8, Bottom buttons set at 3-4-1, Temp ranges from 245 - 290

3 Mixed corn/pellets at a 50/50 rate Auger set at 5, blower set at 8, Bottom buttons set at 3-2-1, Temp ranges from 275-300.

Absolutly nothing scientific about this one. This info is solely for my benefit so next year I will know what works best and is most efficient at my house.

 

[BDPVT]

We can't all be "research scientist". Some of us are going to use, what's available.

It's not a question of how you go about collecting data, use whatever method works for you. But how can you compare random samplings from different stoves to your own results? It seems most pellet users are "scientists" in one way or another and enjoy experimenting with their stoves. There are tons of useful info on this forum as a result of those experiments. I just don't believe this thread is going to be useful.

We can't be all as perfect as you. Since you're this scientist, do some experimenting and show us what YOU have.

Wow, that's a lot of resentment! I thought this forum was an open exchange of ideas and opinions. People come here to share their expertise and experience. I thought I could add my opinion to the discussion without being attacked for being knowledgeable. I always come to this forum with an open mind and hope to learn something new. Maybe you should try it sometime.

 

[jtakeman]

We can't all be "research scientist". Some of us are going to use, what's available.

It's not a question of how you go about collecting data, use whatever method works for you. But how can you compare random samplings from different stoves to your own results? It seems most pellet users are "scientists" in one way or another and enjoy experimenting with their stoves. There are tons of useful info on this forum as a result of those experiments. I just don't believe this thread is going to be useful.

We can't be all as perfect as you. Since you're this scientist, do some experimenting and show us what YOU have.

Wow, that's a lot of resentment! I thought this forum was an open exchange of ideas and opinions. People come here to share their expertise and experience. I thought I could add my opinion to the discussion without being attacked for being knowledgeable. I always come to this forum with an open mind and hope to learn something new. Maybe you should try it sometime.

BDPVT,

If you could provide some incite I would listen. I always want to learn.

Would there be a way to standardize these temps?

jay

 

[BDPVT]

We can't all be "research scientist". Some of us are going to use, what's available.

It's not a question of how you go about collecting data, use whatever method works for you. But how can you compare random samplings from different stoves to your own results? It seems most pellet users are "scientists" in one way or another and enjoy experimenting with their stoves. There are tons of useful info on this forum as a result of those experiments. I just don't believe this thread is going to be useful.

We can't be all as perfect as you. Since you're this scientist, do some experimenting and show us what YOU have.

Wow, that's a lot of resentment! I thought this forum was an open exchange of ideas and opinions. People come here to share their expertise and experience. I thought I could add my opinion to the discussion without being attacked for being knowledgeable. I always come to this forum with an open mind and hope to learn something new. Maybe you should try it sometime.

BDPVT,

If you could provide some incite I would listen. I always want to learn.

Would there be a way to standardize these temps?
Jay,
I'd be happy to get involved. You seem to be pretty far along in your testing and I admire your efforts. Results can only be as good as the experiment, and you don't need fancy equipment to do good testing. As a matter of fact, your pellet stove is a pretty good laboratory. Send me a link to your test results. I would enjoy seeing what you've done. Maybe I can help in your efforts.

jay

 

[jtakeman]

https://www.hearth.com/talk/threads/42511/

Almost finished with them. Last brand in the stove. I want to test the big names next. I have always used a good thermometer and judged my brands with there temp output, I want maximum heat for my money.

jay

 

[Bobby]

If your trying to read with IR thermometers on reflected services, put a small square of scotch tape on them. Then you'll see a different temp. My vent pipe reads 91F on the gavenized part, I left a tag on the pipe and read on it and get 180-200F. Try it and see

 

[DannMarr]

My inquiry was to see the differences of pellet heat outputs. I realize different stoves and settings and where the temperature readings are done, play a part in this. But this information can guide us to see if our stoves are performing as they should and if the pellets we are using are the best for our needs. Thanks for the responses.
I AM A BIG FAN OF LEARNING, so don't let negative remarks stop you from posting. All information provided will help someone in some ways, more for some.

 

[stoveguy2esw]

i have no idea but its 78F in my house right now with a foot of snow on the ground stove set on 2 (of 9) and cruising on a thermostat

 

[little_hawk_59]

if you all want a standered then get the temp at like one inch from the store in the air stream that is how i get mine

 

[poconoman]

We can't all be "research scientist". Some of us are going to use, what's available.

It's not a question of how you go about collecting data, use whatever method works for you. But how can you compare random samplings from different stoves to your own results? It seems most pellet users are "scientists" in one way or another and enjoy experimenting with their stoves. There are tons of useful info on this forum as a result of those experiments. I just don't believe this thread is going to be useful.

We can't be all as perfect as you. Since you're this scientist, do some experimenting and show us what YOU have.

Wow, that's a lot of resentment! I thought this forum was an open exchange of ideas and opinions. People come here to share their expertise and experience. I thought I could add my opinion to the discussion without being attacked for being knowledgeable. I always come to this forum with an open mind and hope to learn something new. Maybe you should try it sometime.

The ONLY thing you're doing is criticize. Since your the 'scientist', TELL us the BEST way to conduct these experiments. Walk the walk and educate us.