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Apparel Calculator

Apparel Calculator. Joey Nielsen Derek Jensen Robb Hays. Create customizable heat loss model of the human body Create calculator that computes insulation thicknesses for various textiles Translate insulation thicknesses into usable information for the user. Project Objectives.

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Apparel Calculator

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  1. Apparel Calculator Joey Nielsen Derek Jensen Robb Hays

  2. Create customizable heat loss model of the human body • Create calculator that computes insulation thicknesses for various textiles • Translate insulation thicknesses into usable information for the user Project Objectives

  3. Radiation is negligible • Heat transfer between body parts is negligible • Wind speed is normal to the surface of body parts • Thermal conductivities and other textile properties are uniform • 30% of heat loss is from head • Other 70% is divided among other body parts equally Assumptions

  4. Model of the Human Body Decompose body into system of 5 cylinders (arms, legs, torso) and 1 sphere (head) and find sizes of each using biometrics from Drillis and Contini

  5. Solving for Convective coefficient Find Re, Nu, and finally h

  6. Finding required insulation thickness Use h to find thickness, based on equivalent resistance of each layer

  7. Capturing the results Spreadsheet programmed in Excel

  8. Support for multiple layers of clothing • Computer modeling of body heat loss • GUI standalone interface • Support for warm weather clothing (including radiation effects) Possible improvements

  9. APPENDIX Derivation of solution

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