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Cold Hands? Which Hot Chocolate Cup is the best Hand Warmer?

Cold Hands? Which Hot Chocolate Cup is the best Hand Warmer?. December 11, 2006 Matthew Vogel Matt Nichols. Cold Hands?. The picture to the left depicts how much of your hand is in need of warming when your hand “feels” cold. Life is so much harder when your hands are cold.

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Cold Hands? Which Hot Chocolate Cup is the best Hand Warmer?

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  1. Cold Hands?Which Hot Chocolate Cup is the best Hand Warmer? December 11, 2006 Matthew Vogel Matt Nichols

  2. Cold Hands? The picture to the left depicts how much of your hand is in need of warming when your hand “feels” cold • Life is so much harder when your hands are cold. • There are plenty of hand warmers out there. • This project investigates the phenomenon of warming your hands while enjoying a national past-time — drinking hot chocolate. Courtesy of www.heatbands.com/ Above pictures courtesy of Google Images “hand warmers”

  3. The Best Hand Warmer? • Which cup acts as the best Hand Warmer? • Plastic Cup • Ceramic Mug • Styrofoam Cup Above pictures courtesy of Google Images “plastic cup, mug, Styrofoam cup”

  4. The Project • This project is NOT interested in which cup is the best insulator. • This project investigates how different cups for your hot chocolate can allow you to effectively warm your HANDS and insides. • Specifically, this project investigates which cup keeps the outside temperature of the cup between 40 and 50o Celsius

  5. The Experiment Thermocouple designed to take temperature measurement from center of water • The test apparatus was set up to measure temperatures of the inside water every 30 seconds. • The test was repeated for all 3 different cups. Watch allowed us to monitor results every 30 seconds Data acquisition system Water brought to a boil

  6. Data Analysis and Assumptions Wall of Cup T1 Ts • Assumptions: • Cups are perfect cylinders • The water was moving inside the cup causing forced convection and thus the inside temperature of the cup was the temperature of the water. q”cond,k q”conv,h

  7. Data Analysis

  8. The Results-Water Temp

  9. The Results-Surface Temp Tm= 17 min Tp= 15 min

  10. So In the Future? • Remember a ceramic mug just doesn’t keep your hot chocolate warm it also keeps your Hands warm. • If it is a cold day outside and you are without a mug, grab a Plastic cup before a Styrofoam one to make for more pleasant drinking with Warm Hands. Courtesy of www.heatbands.com/

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