Roll heat pipe is a novel type of heat pipe which is different from conventional or concentric annular heat pipes because heat is transferred radially from the inner pipe (evaporator region) to the outer pipe (condenser region). The condensed liquid flows back from condenser to evaporator by bridge wicks. In this paper, a two dimensional steady state analysis of the performance of the roll heat pipe is reported. The effect of boundary conditions in on the heat pipe thermal resistance is investigated. Result reveal that the RHP thermal resistance decrease with the heat input and the RHP thermal performance is controlled by the outer surface temperature. Result also revealed that a higher grade of isothermalisation can be obtained with heat input location management.
steady states, thermal resistance, boundary conditions, localized heat
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