Recent content by Scratchy

Thanks! I did that out several times and just missed that!

So I'm trying to perform this calculations with the actual numbers I will be using and I am getting a small, negative number for an R-value which doesn't make sense. If: the outside air Text = -20c the inside air at T0 =24c if I want the final temperature after 24hrs to be Tt = 4c using...

Awesome that helps clear up a lot! Thanks so much! So with your assumptions Tinit and Text are at time 0, correct? And if I wanted the temp at T(24hrs) to be greater than or equal to 4.5 I just set T(24hrs) to 4.5C and then find the specific heat capacity of a lipo battery, and add in mass then...

Howdy everyone, I'm sorry if this is in the wrong forum, but since I believe it is mostly a thermodynamics problem I think this is the right arena. My questions stems from trying to insulate a bank of batteries in cold weather. I am trying to determine the proper material and design...