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Heating of Magnesium Plates

Heating of Magnesium Plates. By: Jonathan Scott. Introduction. The Problem. Constant temperature profile needed Press pulls away too much heat. Desired failure mode Undesired failure mode. Assumption.

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Heating of Magnesium Plates

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  1. Heating of Magnesium Plates By: Jonathan Scott

  2. Introduction

  3. The Problem • Constant temperature profile needed • Press pulls away too much heat

  4. Desired failure mode • Undesired failure mode

  5. Assumption • No contact resistance between press and magnesium plate • Lumped Capacitance • Room temperature = 298 K • Open convection on all exposed surfaces

  6. The Solution Tmax = 150 C or roughly 425 K Tf = 362 K Ra = 4.35x10^5 Nu top = 13.86 Nu bottom = 6.93 h = 14.83 W/mK Heat loss thru Natural Convection = 39.9 W Heat loss thru Conduction = 63.3 W

  7. Conclusion • Total Heat loss = 103.2 W • 103.2 W must be applied at the press to increase Ts at that point

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