Question: a pipe is constructed of two cylindrical shells joined by...
- A pipe is constructed of two cylindrical shells joined by a
shrink fit, as shown in the figure. The inner shell is stainless
steel with a thermal conductivity of 15.1 W/m∙K and a thickness of
3 mm. The outer shell is Inconel with a thermal conductivity of
11.6 W/m∙K and a thickness of 2.5 mm. The contact conductance
between the Inconel and the stainless is 4310 W/m2K.
(Note that in this case there is an extra thermal resistance term
associated with the contact, and Rcontact=
1/contact conductance x contact area). A liquid solution
flows inside the pipe with a heat transfer coefficient of 3200
W/m2K and water flows over the exterior of the pipe with
heat transfer coefficient of 7900 W/m2K.
- Calculate the total thermal resistance from the liquid solution to the water for a pipe 1 meter long. Assume no fouling and use dimensions on the figure.
- What is the controlling resistance?