# p1.9-6 - 1.9-6 Your company manufacturers heater wire...

This preview shows page 1. Sign up to view the full content.

1.9-6 Your company manufacturers heater wire. Heater wire is applied to surfaces that need to be heated and then current is passed through the wire in order to develop ohmic dissipation. A key issue with your product is failures that occur when a length of the wire becomes detached from the surface and therefore the wire is not well connected thermally to the surface. The wire in the detached region tends to get very hot and melt. The wire diameter is D = 0.4 mm and the current passing through the wire is current = 10 amp. the detached wire is exposed to surroundings at T = 20ºC through convection and radiation. The average convection heat transfer coefficient is h = 30 W/m 2 -K and the emissivity of the wire surface is ε = 0.5. The length of the wire that is detached from the surface is L = 1 cm. The ends of the wire at x = 0 and x = L are held at T end = 50ºC. The wire conductivity is k = 10 W/m-K and the electrical resistivity is ρ e = 1x10 -7 ohm-m.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern