Heat transfer coefficient at the surface of the wire

Reference no: EM13849486

Assignment 1 - Material Balance

A platinum wire of length 0.5m and diameter 1mm conducts a current of 10A. The ambient temperature is 20oC, and the heat transfer coefficient at the surface of the wire is 20 W.m-2.K-1. The thermal conductivity of platinum is 47 W.m-1.K-1 and the specific resistivity is 10.6 ??.cm. Calculate:

(a) The temperatures at the centreline and the surface of the wire
(b) The wire is coated with a 1 mm layer of plastic insulating material of km = 0.1W.m-1.K-1. Calculate the temperature at the inner and outer surfaces of the insulation.

Reference no: EM13849486

Questions Cloud

Essay anti-american love and hate relationship : Write 2 page essay Anti-American Love and Hate Relationship

Write about the economic and social : We have undertaken a long journey in this course. It is time to stand back and look at the big picture of aviation's rapid progress from its humble beginnings to the present day. From the perspective of your newly-gained knowledge, what aspect of ..

Essay about the approach to philosophy in the name of rose : Essay about the approach to philosophy in The Name of the Rose. the approach would be about social and political philosophy

What aspects of writing in general is like to improve : What part do you think you executed the least effectively and why. What aspects of writing in general would you like to improve on in your next essay and why

Heat transfer coefficient at the surface of the wire : A platinum wire of length 0.5m and diameter 1mm conducts a current of 10A. The ambient temperature is 20oC, and the heat transfer coefficient at the surface of the wire is 20 W.m-2.K-1. The thermal conductivity of platinum is 47 W.m-1.K-1 and the spe..

Use the drag coefficient for a horizontal skydiver : 4. A 555-g squirrel with a surface area of 865 cm^2 falls from a 4.4-m tree to the ground. Estimate its terminal velocity. (Use the drag coefficient for a horizontal skydiver. Assume that the cross-sectional area of the squirrel can be approximated a..

Beginning with s = klnns and du = tds - pdv + : Beginning with S = klnNs and dU = TdS - PdV + μdN for the microcanonical ensemble, derive expressions for P, μ, G, F, U and H.

Delta division of ramo products : But the first month using the department shows that my costs are up more than 20 percent." Don Thompson, the general manager of the Delta Division of Ramo Products, had just received his monthly bill for maintenance services and was obviously ups..

Purpose of the article - diagnosis- human by ted gup : Article- Diagnosis: Human by Ted Gup. purpose of the article and main points (please summarize in your own words and do not list!)

User Account

All Pages