APPAREL CALCULATOR Joey Nielsen Derek Jensen Robb Hays.

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Presentation transcript:

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

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

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

SOLVING FOR CONVECTIVE COEFFICIENT Find Re, Nu, and finally h

FINDING REQUIRED INSULATION THICKNESS Use h to find thickness, based on equivalent resistance of each layer

CAPTURING THE RESULTS Spreadsheet programmed in Excel

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

APPENDIX Derivation of solution