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Author Topic: Wood usage for the season?  (Read 9691 times)

RSI

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Wood usage for the season?
« on: February 12, 2019, 11:13:48 PM »

Has anyone ever tracked wood usage and compared it to heating degree days? It would be interesting to see if wood usage for the rest of the season could be accurately estimated with it.
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heat550

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Re: Wood usage for the season?
« Reply #1 on: February 13, 2019, 03:02:38 AM »

I know right down to pound what I burned it's alot . 306,223,000 BTUs thru boiler. So far divide that in 1/2 thats BTUs to the houses. 6600sqft.
Now what's my heating days .. I will get back to ya .

Heat550
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heat550

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Re: Wood usage for the season?
« Reply #2 on: February 13, 2019, 03:27:31 AM »

https://www.degreedays.net/

Here's numbers your looking for .

Heat550
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heat550

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Re: Wood usage for the season?
« Reply #3 on: February 13, 2019, 03:40:17 AM »

37,398 BTUs per degree .. 4040 was my degrees days at average system at 63 degrees .. now how crazy is that number.

Heat550
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heat550

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Re: Wood usage for the season?
« Reply #4 on: February 13, 2019, 04:02:34 AM »

That says I need 7.38 bundles yet and I only have 7 left . That's with a DNR average of 7896 heating degrees days .. might have to get couple more bundles or cut up some nasty wet logs . 👍😎😉

Heat550
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greasemonkoid

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Re: Wood usage for the season?
« Reply #5 on: February 13, 2019, 05:38:12 AM »

How many here have only a certain type of wood with the same moisture content and soundness? I gave up on trying to establish a number since there are sections of pine, poplar, and cottonwood in the pile. Only thing I can say is my moisture content is consistent at 5-10% on all of it.
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BoilerHouse

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Re: Wood usage for the season?
« Reply #6 on: February 13, 2019, 07:17:21 AM »

For this season I have started logging wood use and daily high and low temps, and I will compare this to 2011/12, when I last ran a daily log just to see if anything has changed.  It might give me some sense of the boilers performance- or maybe not. 

I don't see how you can predict wood consumption as this would require an accurate weather forecast.  I find the weatherman has become very good at forecasting one to three days out, and generally not bad a week out, much beyond that its a bit of a crap shoot.  Last year, our March temperatures were "January like", and winter carried on well into April.  No one foresaw that.  For me, this easily added a half cord or more to my annual wood use. 

Grease - How long has your wood aged to get the moisture to 5 - 10%. 

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jreimer

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Re: Wood usage for the season?
« Reply #7 on: February 13, 2019, 07:49:59 AM »

I advocate for measuring your wood consumption by the pound instead of by the cord.  As long as the moisture content is consistent, when we are all talking pounds of wood consumption it doesn't really matter if we are burning poplar, pine, ash or oak.  When you know your pounds per day and BTU efficiency per pound, we can all talk the same language.
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jreimer

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Re: Wood usage for the season?
« Reply #8 on: February 13, 2019, 08:05:01 AM »

Heat550 - How did you calculate your BTU's needed per degree?  Just divided the number of BTU's used (measured to date) by the Degree Days # (calculated to date)?
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heat550

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Re: Wood usage for the season?
« Reply #9 on: February 13, 2019, 11:44:54 AM »

Yep find your degrees days where you live. And the amount you burned.
So you can find out how many pounds it took for a degree . And also find the average degrees days at your location per season. DNR in Minnesota said 7896 for twin cities average degrees days per season.witch is about 3 degrees warmer then. Me .

Heat550
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greasemonkoid

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Re: Wood usage for the season?
« Reply #10 on: February 13, 2019, 12:30:19 PM »

Some good ideas here, need to find a good set of scales, maybe something I can deduct the tare weight and and walk over it during the load.



Grease - How long has your wood aged to get the moisture to 5 - 10%.

Between 3 and 4 years. Hopefully I don't outrun my buffer.
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jreimer

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Re: Wood usage for the season?
« Reply #11 on: February 13, 2019, 12:36:31 PM »

For a scale I use a hanging scale used for meat carcasses with a large tub and hang it from the rafters of my wood shed.
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RSI

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Re: Wood usage for the season?
« Reply #12 on: February 13, 2019, 01:25:01 PM »

That says I need 7.38 bundles yet and I only have 7 left . That's with a DNR average of 7896 heating degrees days .. might have to get couple more bundles or cut up some nasty wet logs . 👍😎😉

Heat550

Have you checked a couple different points in the season to see if it is tracking with your numbers?
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MattyNH

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Re: Wood usage for the season?
« Reply #13 on: February 13, 2019, 03:37:03 PM »

I keep a track on how long the firewood rows last..Been doing that since I've owned owned OWB ( I did skip last yr lol)..Looking back on my lists, You can definitely tell if you've had a really cold winter or a mild winter.. Pretty neat Id say..
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wreckit87

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Re: Wood usage for the season?
« Reply #14 on: February 13, 2019, 04:40:26 PM »

Heat550- If I remember correctly you're closer to Duluth than the cities? If so, Duluth is a shake over 9000 if I remember correctly. I use 9000 in all my design, as "design day" here is only -17 and we both know that's laughable

Greasemonkoid- do you have to set an alarm every 3 hours or how do you keep up feeding that thing with 5-10% MC poplar and cotty? Holy crap
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