By: Jonathan Scott

Introduction

The ProblemConstant temperature profile neededPress pulls away too much heat

Desired failure mode

Undesired failure mode

AssumptionNo contact resistance between press and magnesium plate

Lumped CapacitanceRoom temperature = 298 KOpen convection on all exposed surfaces

The SolutionTmax = 150 C or roughly 425 KTf = 362 KRa = 4.35x10^5Nu top = 13.86Nu bottom = 6.93h = 14.83 W/mKHeat loss thru Natural Convection = 39.9 WHeat loss thru Conduction = 63.3 W

ConclusionTotal Heat loss = 103.2 W103.2 W must be applied at the press to increase Ts at that point