Results 1 to 3 of 3
  1. #1
    Join Date
    May 2010
    Location
    Odessa, TX
    Age
    55
    Posts
    9
    Rep Power
    0

    Assigning a equivalent R-value.



    How would one go about assigning a equivalent R value to a material. Or find the U value and go from there. I have a rude lab set up where I am measuring the heat rise of a pound of water by ten degree F under a material I am testing, and doing the same with know insulating materials, and then basically stacking insulation on top of the insulation I started with until the time it takes to raise the temp ten degree matches the time it took with the material I am testing. It is a "thermal barrier" material. The person I am doing this for will argue that it is not a radiant barrier, but to me it is just a play on words. However and anyway, I am doing this because I find it very interesting to do, and a good project. Any input would be appreciated.



  2. #2
    Join Date
    Aug 2007
    Location
    Sydney
    Age
    51
    Posts
    1,094
    Rep Power
    23

    Re: Assigning a equivalent R-value.

    surenuff
    Q=A U K
    U=W/m2K
    Q=W
    W=J/s
    U=1/R...
    It's a simple case of mathematics where you need to transpose the formula with respect to time. I would help more but I am not familiar with imperial units.

  3. #3
    Join Date
    May 2008
    Location
    Belgie
    Posts
    13
    Rep Power
    0

    Re: Assigning a equivalent R-value.

    Q = Amē * Wh/mē * K
    VB Q = 1 * 0.3Wh/ * K
    Q = 1 * 0.3W/h * 1 = 0.3W/h

Similar Threads

  1. Looking for oil equivalent to POE 160
    By Rigo in forum Technical Speculations
    Replies: 6
    Last Post: 01-09-2009, 03:48 PM
  2. Sourcing a modern equivalent to old USA Copeland compressor
    By weeksy in forum Industrial Compressors
    Replies: 7
    Last Post: 15-05-2009, 03:46 PM
  3. Equivalent Lenght table
    By RODRIGO BR in forum Refrigeration Books
    Replies: 2
    Last Post: 23-11-2007, 05:16 PM
  4. Equivalent length for fittings
    By harsen in forum Technical Speculations
    Replies: 12
    Last Post: 11-04-2007, 05:13 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •