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Can You Review And Provide Feedback On Ger Heat Loss Model?

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Old 05-10-2017, 03:30 PM   #1
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Join Date: Feb 2017
Location: Stanford, CA
Posts: 4
Default Can you review and provide feedback on Ger heat loss model?

Hi all,

I hope you're well!

I'm a graduate student at Stanford University in Palo Alto, California, and am looking at ways of improving heat loss in Gers.

I've built a simple model that tries to capture heat loss through thermal conductivity and air leakage to determine how many BTUs / hr are lost through various parts of the Ger.

The model is here in this file: https://drive.google.com/file/d/0B6M...ew?usp=sharing

I've also attached the file below.

Given your expertise, I want to reach out the forum to ask for any thoughts or feedback on the model?


- Do the R-Value assumptions look reasonable?
- Does the heat loss through air loss look reasonable?
- How does the total compare to your own experience or numbers you've seen elsewhere?
- How many BTUs do your


systems generate? Is this sufficient?
- Have I done anything stupid?

Thank you in advance for your help - I really appreciate your support!


Attached Files
File Type: zip Extreme_Gerhub_Heat Loss Model_v1.zip (10.4 KB, 109 views)
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Old 05-10-2017, 04:41 PM   #2
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Join Date: Jan 2012
Posts: 2,402
Default Re: Can you review and provide feedback on Ger heat loss model?

Can't speak to the math/engineering of it all as that is not my area of knowledge. I will say that in my 30' yurt, I heat with this stove:


Which definitely keeps it quite warm, even well below 0F. Beware of overinsulating a soft-walled yurt. The structure needs to breath. If you have ever spent the night in a tent, what usually happens? Everything inside is sort of damp in the morning from the


. The same happens in a yurt. The structure MUST breath or you will get mold.
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