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Heat transfer in Lightsabers

Investigating heat flux from focus crystal to maintain safe surface temp in Lightsaber. Thermal circuit calculations for efficient energy transfer.

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Heat transfer in Lightsabers

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  1. Heat transfer in Lightsabers An ME 340 Project by Clayton Grames

  2. Introduction • Lightsabers are fictional weapons used in the Star Wars Universe • Energy is focused through a crystal to form a beam of light that can cut through virtually anything • Lightsabers are traditionallythe weapons of Jedi Knights

  3. Objective • This project aims to find the maximum heat flux from the focus crystal that would maintain a safe constant outer surface temperature • Assumptions: • Constant heat flux through from the crystal radially outward • Liquid coolant in the crystal chamber negates the effects of radiative heat transfer • Crystal mounts are fully insulated

  4. conditions Insulation K = 0.2 W/m*K L = 15 mm • Convective heat transfer coefficients are found for the internal flow and the outer surface • The hydraulic internal flow is turbulent and causes free convection to be negligible • A thermal circuit is used to calculate the heat flux from the surface of the lightsaber to center of the crystal chamber Water V = 1 m/sTi = 300 K, k = 0.58 Water To = 400 K Al Housing K = 200 W/m*K L = 10 mm Ts = 300 K T∞ = 290 K

  5. Thermal circuit • This shows the thermal circuit used to calculate the heat flux through the system • Where: • Q = (Tsurface – Tinside)/Rtotal • The heat flux for the given assumptions was found to be very small • Q = 2.09 W/m^2 Water Cond. Rubber Insulation Outside Conv. Al Shell Water Convection with Wall and Crystal

  6. Calculations

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