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Author Topic: Heat Transfer: Question of the Week  (Read 13779 times)
David A. Andersen
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« on: March 13, 2009, 10:45:39 AM »

Carl requested more IR Training here. So I thought a Question of the week type thing should identify what we should work on.
This is not about right and wrong answers, but about everyone's perception of the subject.
This will get us going on what we need to work on, so here goes...

Please vote so we can decide to move on or not.


This is a residential building with a gable roof.
There is a 5 foot attic space with flat ceilings.
The air conditioning is set at 68 F. It is 85 F. outdoors.
« Last Edit: March 13, 2009, 03:31:56 PM by David A. Andersen » Logged

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Dale Duffy
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« Reply #1 on: March 14, 2009, 01:10:37 AM »

Thanks Dave...Great help for us that know nothing about the subject..!!
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Dale Duffy

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Barry Adair
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« Reply #2 on: March 14, 2009, 06:11:48 AM »

tutorial
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badair
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Carl Brown
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« Reply #3 on: March 14, 2009, 06:19:26 AM »

Thanks guys this is going to help a LOT.

Barry that was great.
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Barry Adair
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« Reply #4 on: March 14, 2009, 06:30:16 AM »

Thanks guys this is going to help a LOT.

Barry that was great.

now all i have to do is remember all this
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badair
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Carl Brown
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« Reply #5 on: March 14, 2009, 06:33:13 AM »

Thanks guys this is going to help a LOT.

Barry that was great.

now all i have to do is remember all this


And post more examples like that and we will get it easier.
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Dale Duffy
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« Reply #6 on: March 14, 2009, 08:25:45 AM »


I clicked 1-2-3 as the answer, I don't know if it's right, have to head out to an inspection soon, but I sure would like to thank Dave for taking the time to make a poll...I don't know how to make polls--)

but will learn-;)
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Dale Duffy

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Carl Brown
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« Reply #7 on: March 14, 2009, 08:27:39 AM »

Dale,

Did you watch Barry's link?
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Jim McKee
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« Reply #8 on: March 14, 2009, 08:55:25 AM »

great stuff guys....
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Jim McKee
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Dale Duffy
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« Reply #9 on: March 14, 2009, 09:46:31 AM »

Dale,

Did you watch Barry's link?

I watched it after I voted, but just looked at the first page, I was up till midnight last night doing Repo Reports...wild

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Dale Duffy

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Dale Duffy
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« Reply #10 on: March 14, 2009, 09:47:36 AM »

Now I'm off to Saturday's inspection, 4000 sf. Repo....should be a LONG day---- Huh?
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Dale Duffy

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David A. Andersen
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« Reply #11 on: March 14, 2009, 10:11:54 AM »

That is a good show Barry!

Now lets think this through in the house application I used.
As we saw, ALL Energy on earth comes from the sun (to start with).
The sun warms the house roof, so it starts as Radiation.
But how does it heat the air inside the house?

Our ultimate question to answer, is which from of heat transfer has the greatest effect on heating the indoor air of the house.

For anyone afraid of making a wrong answer, you can not determine this easily (if at all) so it will make for good conversation...

This should help your perspective of what we are trying to figure out in our thermal scans.
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David A. Andersen & Associates
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http://www.midtninspections.com
ITC Certified Level II Thermographer Cert#1958
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http://thermalimagingscan.com
HVAC Certification EPA Cert#2046620
Jim McKee
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« Reply #12 on: March 14, 2009, 10:49:59 AM »

hmmmmmm....so my radiation vote was wrong?
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Jim McKee
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David A. Andersen
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« Reply #13 on: March 14, 2009, 12:18:12 PM »

Not wrong! Maybe not the best answer?

Why did you choose radiation?
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David A. Andersen & Associates
Clarksville - Nashville Home Inspector Lic#40
http://www.midtninspections.com
ITC Certified Level II Thermographer Cert#1958
Building Science Thermographer Cert#33784
http://thermalimagingscan.com
HVAC Certification EPA Cert#2046620
Bill Warner
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« Reply #14 on: March 14, 2009, 01:44:09 PM »

This is going to be a great discussion!
This question really makes you think the way it is worded.  You have to whittle away the extra information that can become confusing in order to arrive at the best answer.
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BC Warner Inspections
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