Blow Dryers A heat transfer problem waiting to happen By Scott Lemmon and Charlie Crosby.

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Presentation transcript:

Blow Dryers A heat transfer problem waiting to happen By Scott Lemmon and Charlie Crosby

Experiment Determine outlet temperature of a standard household blow dryer  Items Needed for experiment Blow Dryer Thermocouple AC Multimeter Anemometer

Problem q coils q motor T out q out T in q electrical L

Inlet Temp (C)Air Speed (m/s) Mass Flow (kg/s) Reynolds's Number Calc. Outlet (C) Measured Outlet (C) Results VoltsAmpsWatts Total Power Motor Power Heater Power1190

Conclusion Blow dryers make really HOT! air Length of blow dryer is negligible Outlet temperature difficult to measure

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