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ME 340 Project – David Christensen and Vance Murray – March 31, 2010

Application of Heat Transfer to Ensure Product Safety on a Prosthetic Device for Finger Amputees. ME 340 Project – David Christensen and Vance Murray – March 31, 2010. Introduction. A prosthetic device is being made for finger amputees as a part of a BYU capstone project.

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ME 340 Project – David Christensen and Vance Murray – March 31, 2010

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  1. Application of Heat Transfer to Ensure Product Safety on a Prosthetic Device for Finger Amputees ME 340 Project – David Christensen and Vance Murray – March 31, 2010

  2. Introduction • A prosthetic device is being made for finger amputees as a part of a BYU capstone project. • During user testing, the user mentioned the possibility of using the device to pull things out of the oven after they have cooked. • In order to determine if that would be safe, we have conducted both analytical and physical tests. Video ME 340 Project – David Christensen and Vance Murray – March 31, 2010

  3. Problem Set-Up After heating the pan to a temperature of 350˚ F, the device was used to remove the pan from the oven. A thermocouple was used to measure the temperature at one location near her hand over an interval of one minute. • Find • Temperature of the surface of the device near her hand over time • Given • T oven = T pan,i = 350˚ F • T device,I = T∞ = 69 ˚ F ME 340 Project – David Christensen and Vance Murray – March 31, 2010

  4. Experimental Solution Results Results ME 340 Project – David Christensen and Vance Murray – March 31, 2010

  5. Analytical Solution Results Set-up Lumped capacitance method was used to test the time it would take to cause harm (T = 120 ˚ F) if the pan stayed at a constant temperature of 350˚ F (pan on stove). Results According to our model, in would take almost four minutes to reach a dangerous temperature. ME 340 Project – David Christensen and Vance Murray – March 31, 2010

  6. Conclusions • The device seems suited to safely handle the thermal conditions that would be required to pull something out of the oven. • However, proper care must be taken to allow some cooling at the tip before touching the device with the user’s other hand. • Also, care must be taken to ensure the hot item is tightly secured by the device. ME 340 Project – David Christensen and Vance Murray – March 31, 2010

  7. Appendix Additional Calculations Additional Pictures Calculations of the device modeled as a fin with steady state conditions ME 340 Project – David Christensen and Vance Murray – March 31, 2010

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