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The uncertainty in measurement by the thermocouple is given as ±0.5°C by the
manufacturer for T-type thermocouples. However, when we compared the thermocouples
with a RTD, the maximum deviation found was ±0.31°C.
The thermal conductivity of the fluid is measured with the help of the KD2 pro whose
accuracy is within ±5% for the range 0.2−2 W/m.K.
The thermal conductivity of the 304 stainless steel is obtained from an equation from a
curve fitted value. Here the maximum uncertainty found is 0.617%.
Using these uncertainties, the uncertainty in the measurement of Nusselt number is 6.54%
(see Table 3.2).
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