1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Thermal conductivity through a cylinder?

  1. Aug 21, 2007 #1
    1. The problem statement, all variables and given/known data

    A copper tube, of internal radius 6.959mm, overall radius 7.975mm, thickness 1.016mm, contains water at 68 deg Celsius, and is present in a room with an ambient temp of 26.65 deg Celsius. If the tube is 1000mm long, what will be the rate of heat transferred from the copper tube?
    k copper = 401 W/mK, A of tube = 0.050m, change in T=42.35 deg C, thickness =0.001016m.

    2. Relevant equations

    Q/t=kAΔT/d.... or Heat transfer across length of cylindrical tubing equation (not specifically known)

    3. The attempt at a solution

    I have entered into the Q/t=kAΔT/d equation and received an answer of about 850 000 W, or 850kW, which seems entirely unrealistic. what am I doing wrong?
     
  2. jcsd
  3. Aug 21, 2007 #2

    Astronuc

    User Avatar

    Staff: Mentor

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Thermal conductivity through a cylinder?
  1. Conducting cylinde (Replies: 1)

  2. Thermal conductivity (Replies: 8)

  3. Thermal conductivity (Replies: 4)

Loading...