Thermal Conductivities of Oven Mitts

1
Thermal Conductivities of Oven Mitts

• Jordan Holmes
• Stephen Merrill

2
Objective

• Our goal was to find the thermal conductivities
  (k) of different kinds of gloves. We tested the
  following
• Conventional Oven Mitt
• Polymer Oven Mitt
• Snow Glove
• Dishrag

3
Procedure

• We used an aluminum block to calculate the rate
  of heat transfer from the stove top.
• Using this rate of heat transfer we measured the
  temperatures of the inside of each glove after
  reaching steady state in contact with the
  aluminum block.
• We then calculated the thermal conductivity for
  each material.

4
Measurements

• Assumptions
• Aluminum block is pure aluminum
• Constant surface temperatures
• Temperatures measured after 5 minutes
• Snow Glove
• T 80C
• L .0045 m
• TAl 105C
• Dishrag
• T 82C
• L .0045 m
• TAl 111C

• Stove
• T 108C
• Aluminum Block
• A .051.089 .00454 m2
• L .0126 m
• T 85C
• k 237 W/mK
• Heat Transfer Rate
• q (108-85)237.00454/.0126 1964 W
• Conventional Oven Mitt
• T 70C
• L .0025 m
• TAl 85C
• Polymer Oven Mitt
• T 80C
• L .003 m
• TAl 105C

5
Results

• k qL/A(TAl T)
• Conventional Oven Mitt
• k 1964.0025/(.0045415) 72.1 W/mK
• Polymer Oven Mitt
• k 1964.003/(.0045417) 76.34 W/mK
• Snow Glove
• k 1964.0045/(.0045425) 77.9 W/mK
• Dishrag
• k 1964.0045/(.0045429) 67.13 W/mK

6
Conclusion

• Most of these gloves have similar thermal
  conductivities but the snow glove is the most
  conductive.
• We concluded that a dishrag can be just as useful
  as an oven mitt or better for getting hot things
  out of the oven because it has a lower thermal
  conductivity.