Abstract
An analytical model for predicting peak (dryout) steady-state heat transfer limits in heat pipes utilizing sintered-wick structures is presented. Boiling is accounted for and one-dimensional liquid and vapor flows are assumed. Experimental measurements of peak heat flux values for two cylindrical sintered-copper wicks are made and compared with analytical predictions. Theoretical and experimental dryout heat flux values agree to within 10%. Using the analytical model, flat plate and cylindrical wick heat pipe performance is evaluated as a function of design parameters. Parameters for high-performance flat plate and cylindrical wicks are identified. Peak heat fluxes up to 50 and 100 W cm −2, respectively, are predicted for 10 cm long high-performance wicks using water as the coolant.
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