Heat flux meters use a very sensitive device known as a thermopile to measure the temperature difference across a thin, heat conducting film made of kapton (k = 0.345 W/m•K). If the thermopile can detect temperature differences of 0.1°?C or more and the film thickness is 2 mm, what is the minimum heat flux this meter can detect?
What will be an ideal response?
A certain thermopile used for heat flux meters is considered. The minimum heat flux this meter can detect is to be determined.
Assumptions 1 Steady operating conditions exist.
Properties The thermal conductivity of kapton is given to be 0.345 W/m?K.
Analysis The minimum heat flux can be determined from
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