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

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

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

4. Inlet Temp (C)Air Speed (m/s) Mass Flow (kg/s) Reynolds's Number Calc. Outlet (C) Measured Outlet (C) 2416.2.01582494198.26106.6 Results VoltsAmpsWatts Total Power11910.61261.4 Motor Power1190.670.4 Heater Power1190

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