Burner Duty Cycle

Reply

  #1  
Old 12-12-13, 07:40 PM
Member
Thread Starter
Join Date: Oct 2008
Location: USA
Posts: 2,922
Received 8 Votes on 8 Posts
Burner Duty Cycle

Wednesday night was chilly, at least for the second week of December: low of -5 deg F. As is typical in the Midwest, the cold temps were accompanied by high, steady barometric pressure and calm winds, so it wasn't a worst-case scenario.

I have an elapsed-time meter on my gas burner. The burner fired 60% of the available hours during the night. Therefore, 40% of the available hours weren't needed for firing. For last night, at least, the boiler was 40% oversized, right? It would be easy to convert burner duty cycle to Btu/hr heat loss.

I think my worst-case situation occurs when the temp is perhaps about 15 deg, with strong west wind that blows across about a mile of open field before reaching our house. I'm thinking about how I can record such burner data and then boil it down to make sense out of it. Perhaps try to correlate it with heat-loss calculations?
 
Sponsored Links
  #2  
Old 12-12-13, 08:54 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 3 Votes on 2 Posts
I'm thinking about how I can record such burner data and then boil it down to make sense out of it. Perhaps try to correlate it with heat-loss calculations?
If you are going to try and correlate the wind factor, can't you just do the same thing as you did last night and compare the results for the difference?

I should think you would also want to incorporate INSOLATION value too... sunny day or cloudy... all things that affect heat loss.
 
  #3  
Old 12-12-13, 09:14 PM
Member
Thread Starter
Join Date: Oct 2008
Location: USA
Posts: 2,922
Received 8 Votes on 8 Posts
If you are going to try and correlate the wind factor, can't you just do the same thing as you did last night and compare the results for the difference?
Yes, good idea. I have a meteorology station that, I think, records average wind speed for past periods. I have too many gadgets, so I kind of lose track of them and what they all do.

I get reminded of my weather station when it conks out, and I then get a computer-generated email from NOAA telling me that they haven't received my data for several hours. So, then, I'm up on a ladder, resolving the problem. How do you young folks ever find time to work?
 
  #4  
Old 12-12-13, 09:23 PM
NJT's Avatar
NJT
NJT is offline
Member
Join Date: Oct 2006
Location: USA
Posts: 23,539
Received 3 Votes on 2 Posts
you young folks
:NO NO NO: You ain't talking to me... well, unless yer an octogenarian, soon to be nonagenarian, only then would you have the right to call me a 'young folk' !

My ultimate data gathering system would be all those sensor thingies running into a data acquisition system into a computer program and mashing the data and giving me pretty charts... I like charts.

I think that snow cover on the roof and around the exposed basement walls needs to be calculated too because of the added insulation value. (when I shovel the snow off the walks I intentionally pile it against the foundation. It's nice and warm in my igloo!)

Might as well throw in relative humidity because the wood framing shrinks and swells. More infiltration in drier winter weather...

Yeah, one can easily go nutz.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: