Calculate average mass transfer convection coefficient

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Reference no: EM131337743

An experiment is conducted to determine the average mass transfer convection coefficient of a small droplet using a heater controlled to operate at a constant temperature. The power history required to completely evaporate the droplet at a temperature of 37°C is shown in the sketch. It was observed that, as the droplet dried, its wetted diameter on the heater surface remained nearly constant at a value of 4 mm.

(a) Calculate the average mass transfer convection coefficient based on the wetted area during the evaporation process when the droplet, heater, and the dry ambient air are at 37°C.

(b) How much energy will be required to evaporate the droplet if the dry ambient air temperature is 27°C, while the droplet-heater temperature remains at 37°C?

Reference no: EM131337743

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