David Jones and Michael Wilcox

Bismuth Telluride cubes carry heat from one direction to the other Charge comes from DC Voltage

Increase in Voltage => Increase in ΔT At 12 V => ΔT = 51˚C Current heat load = 0W T hot,spec chart = 35˚C, T cool,spec chart = -16˚C

Two Peltier Devices connected to stainless steel plates Coolant runs between radiator and peltier devices.

Coolant is used to keep the T hot down (T room ) Pumped through a fan-cooled radiator Coolant used for anti-rust, anti-mold, increased heat dissipation Stainless Steel used Easily cleaned Resistant to Rusting Holds Heat Well Stainless Steel: k=14.9 W/m*K

Thermal grease used to bridge the gap Stainless kN/m 2, R= x10 -4 m 2 *K/W Thermal grease 3500kN/m 2 ), R=.04 x10 -4 m 2 *K/W CopperStainless

Measure time constant (τ) to reach steady state Cooling τ = 86s Return to T room τ = 98.8s

Basic Assumption: 1-D Transient Conduction Governing Equation: Temperature Distribution: Additional Assumptions: h = 300 W/(m^2*K) Peltier device neglected, except Device modeled by using T ∞ = T i - ΔT = -27˚C

Time constant: τ = 89.9s